DOCSLIB.ORG

Development and Application of Simultaneous 2D Flow Velocity And

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Development and Application of Simultaneous 2D Flow Velocity And Development and application of simultaneous 2D flow velocity and gas temperature measurements using thermographic phosphors under engine-relevant conditions Valerio Frattina To cite this version: Valerio Frattina. Development and application of simultaneous 2D flow velocity and gas tempera- ture measurements using thermographic phosphors under engine-relevant conditions. Chemical and Process Engineering. Université Paris-Saclay; Universität Duisburg-Essen, 2019. English. NNT : 2019SACLC073. tel-02466375 HAL Id: tel-02466375 https://tel.archives-ouvertes.fr/tel-02466375 Submitted on 4 Feb 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Development and application of 073 C simultaneous 2D flow velocity and gas temperature measurements : 2019SACL using thermographic phosphors NNT under engine-relevant conditions Thèse de doctorat de l’Université de Duisburg-Essen et de l'Université Paris- Saclay, préparée à CentraleSupélec École doctorale n°579 Sciences Mécaniques et Energétiques, Matériaux et Géosciences Spécialité de doctorat : Energétique Thèse présentée et soutenue à Duisburg, le 21/10/2019, par Valerio Frattina Composition du Jury : Christine Rousselle Professeur, Université Orléans (PRISME) Président Thierry Schuller Professeur, Université Toulouse III (IMFT) Rapporteur Benoit Fond Maitre de conférences, Université de Magdeburg (OVGU) Examinateur Sebastian Kaiser Professeur, Université de Duisbourg-Essen (IVG) Examinateur Gilles Bruneaux Ingénieur de Recherche, IFPEN Directeur de thèse Christof Schulz Directeur de Recherche, Université de Duisbourg-Essen (IVG) Directeur de thèse Titre : Développement et application d'une technique de diagnostic optique pour des mesures 2D et non-intrusives de température et de vitesse des gaz en condition moteur Mots clés : température, PIV, phosphore, diagnostique optique, Résumé : Dans le cadre de cette thèse, une tech- Les mesures ont été effectuées à un régime mo- nique de diagnostic optique a été développée teur de 1200 tr/min avec une fréquence d'échan- pour mesurer simultanément la température et la tillonnage de 10 Hz entre 180 et 540°vil sans vitesse de gaz dans un moteur thermique trans- combustion. parent. Les champs de température et de vitesse ont été La technique de la PIV-thermographique (T- mesurés avec succès à différents angles vilebre- PIV) combine la thermométrie par phosphores- quin pendant la phase de compression et de dé- cence et la vélocimétrie par image de particules tente. Les champs de température obtenus expé- (PIV) et offre la possibilité de mesurer simulta- rimentalement sont comparés aux températures nément la température et la vitesse du gaz. Le obtenues à partir d'une simulation 0D montrant matériau luminophore approprié a été choisi en un écart de température d'environ 1% (200°vil) testant trois luminophores disponibles dans le et de 14% (480°vil) par rapport au modèle de si- commerce : BAM:Eu2+, ZnO et ZnO:Zn. mulation. La précision de mesure estimé est de 55 K (18%) à 300 K et de 2 K (0.3%) à 614 K L'émission lumineuse et la réponse spectrale à sur une moyenne de 200 cycles. divers paramètres, y compris la température, ont été mesurées dans un écoulement gazeux ense- La T-PIV a également été testé pour mesurer la mencé de particules afin de reproduire les con- température des gaz en post-combustion. Dans ditions rencontrées typiquement dans un mo- ce cas, les mesures étaient impossibles, proba- teur. Cela à permis d’obtenir une courbe d'éta- blement en raison d’une dégradation du maté- lonnage dépendante de la température à utiliser riau luminophore utilisé qui ne résiste pas aux dans les expériences sur moteur. Les particules températures élevées de la combustion. Les de ZnO:Zn montrent une sensibilité relative- perspectives de développements futurs qui ré- ment plus forte à la température permettant une sultent de ces résultats sont la sélection d’un lu- précision plus élevée sur la mesure de tempéra- minophore capable de résister à plus hautes tem- ture. pératures. Pour ces raisons, le ZnO:Zn a été choisi comme Enfin, la technique montre un grand potentiel de candidat approprié pour les mesures dans le mo- développement dans un environnement moteur. teur transparent. Université Paris-Saclay Espace Technologique / Immeuble Discovery Route de l’Orme aux Merisiers RD 128 / 91190 Saint-Aubin, France Title: Development and application of simultaneous 2D flow velocity and gas temperature measure- ments using thermographic phosphors under engine-relevant conditions Keywords: Thermographic PIV, thermographic phosphor, temperature, laser diagnostics Abstract: A non-intrusive laser diagnostics Measurements were performed in an internal technique has been developed for simultaneous combustion engine at a speed of 1200 rpm with measurements of velocity and gas temperature a sampling rate of 10 Hz between 180 and in optically accessible internal combustion en- 540°CA under motored conditions. The temper- gines. The technique, thermographic PIV ature and velocity fields were measured success- (T-PIV) combines phosphor thermometry and fully at various times throughout the compres- particle image velocimetry (PIV) and offers the sion and the exhaust stroke. The obtained tem- possibility of simultaneous measurement of gas perature fields are compared with simulated temperature and velocity. bulk-gas temperatures from a 0D model-based simulation showing a temperature deviation of Suitable phosphor materials were selected by around 1% (200°CA) to 14% (480°CA) from the testing three commercially available phosphors: model. The measurement accuracy was found to BAM:Eu2+, ZnO and ZnO:Zn. The lumines- be 55 K (18%) at 300 K and 2 K (0.3%) at 614 K cence emission and the spectral response to var- for the 200-cycles average. ious parameters including temperature were measured yielding a temperature-dependent cal- The potential of the diagnostics was tested also ibration curve to be used for signal interpreta- in in cylinder post-combustion gases. In this tion in engine experiments. The ZnO:Zn phos- case, the diagnostics was failing probably due to phor shows the highest sensitivity to tempera- the characteristics of the phosphor used, which ture allowing higher temperature precision. does not seem to resist to high combustion tem- Therefore, ZnO:Zn phosphor was chosen as the peratures degrading its luminescence properties. suitable candidate for engine measurements. The potential of T-PIV in post-combustion gases remains under the conditions of finding more resistant phosphor particles. Université Paris-Saclay Espace Technologique / Immeuble Discovery Route de l’Orme aux Merisiers RD 128 / 91190 Saint-Aubin, France Titel: Entwicklung und Anwendung einer simultanen, 2D-Geschwindigkeits-, und Temperaturmessmethode mittels thermographischer Phosphore unter motorischen Bedingungen Schlüsselwörter : Thermographische PIV, thermographischer Phosphor, Temperatur, Laserdiagnostik Zusammenfassung: In der vorliegenden Arbeit In einem Verbrennungsmotor wurden wurde eine nicht-intrusive Methode der Temperaturmessungen bei 1200 U/min und 10 Laserdiagnostik zur simultanen Messung von Hz unter geschleppten Bedingungen zwischen Gasgeschwindigkeit und -temperatur in einem 180°KW und 540°KW durchgeführt. optisch zugänglichen Verbrennungsmotor Geschwindigkeit und Temperatur des Gases entwickelt und getestet. Diese Messmethode der wurden an mehreren Kurbelwinkeln während thermographischen PIV (T-PIV) kombiniert des Verdichtungs- und Expansionstaktes Phosphorthermometrie mit Particle Image gemessen und die Gastemperatur mit der Velocimetry (PIV) und ermöglicht die Restgastemperatur einer 0D Simulation simultane Messung von Geschwindigkeit und verglichen. Die Abweichung zwischen Mess- Temperatur eines Gases. und Simulationsergebnissen beträgt 1% (200°KW) und 14% (480°KW). Die Im Verlauf der Arbeit wurden drei kommerziell Messgenauigkeit für den Mittelwert über 200 verfügbare Phosphormaterialien für die Messzyklen beträgt 55 K (18%) bei 300 K und Motorexperimente getestet: BAM:Eu2+, ZnO 2 K (0.3%) bei 614 K. and ZnO:Zn. Die optischen Eigenschaften und die Spektralantwort des Phosphors auf Die Messmethode wurde außerdem zur Parametervariationen wie Restgastemperaturmessung im gefeuerten Temperaturänderungen wurden gemessen. Betrieb des optischen Motors angewandt. Daraus wird eine temperaturabhängige Jedoch konnte unter diesen Bedingungen keine Kalibrationskurve erstellt, die zur validen Messungen durchgeführt werden, da der Temperaturmessung im Motor dient. Der Phosphor möglicherweise bei Phosphor ZnO:Zn wurde für Verbrennungstemperaturen degradiert und die Temperaturmessungen im Motor ausgewählt, da Lumineszenz-Eigenschaften verändert werden. die optischen Eigenschaften des Phosphors die Eine erfolgreiche Anwendung von T-PIV unter größte Sensitivität zu Temperaturänderungen motorischen Bedingungen wird künftig unter aufweisen. der Voraussetzung möglich sein, dass verbrennungsresistente Phosphormaterialien gefunden werden. Université Paris-Saclay Espace Technologique / Immeuble Discovery Route de
Load more

Recommended publications
  • Phosphorescent Thermal History Sensors for Extreme Environments
    Imperial College London Department of Mechanical Engineering Phosphorescent thermal history sensors for extreme environments Álvaro Yáñez González Submitted in part fulfilment of the requirements for the degree of Doctor of Philosophy in Mechanical Engineering of Imperial College London and the Diploma of Imperial College London September 2015 2 DECLARATION OF ORIGINALITY I, Álvaro Yáñez González, certify that the thesis entitled “Phosphorescent thermal history sensors for extreme environments” and the work presented herein are my own and any information derived from published or unpublished work of others has been properly acknowledged and a list of references is provided at the end of the thesis. COPYRIGHT DECLARATION The copyright of this thesis rests with the author and is made available under a Creative Commons Attribution Non-Commercial No Derivatives licence. Researchers are free to copy, distribute or transmit the thesis on the condition that they attribute it, that they do not use it for commercial purposes and that they do not alter, transform or build upon it. For any reuse or redistribution, researchers must make clear to others the licence terms of this work 3 ABSTRACT The measurement of the surface temperature of many components in gas turbines has become increasingly important as the firing temperature raises to improve thermal efficiency and reduce CO2 emissions. Traditional methods to measure temperatures in real time, such as thermocouples or pyrometers, are sometimes not suitable and an alternative must be sought. Thermal history sensors record the maximum temperatures reached during operation, which can then be measured after the engine has cooled down. Currently, temperature sensitive paints are mainly used to obtain temperature profiles on gas turbine components but they present some limitations such as subjectivity of the measurement, poor resolution and toxicity.
    [Show full text]
  • Development of New Phosphors for High Temperature Thermometry
    Development of new phosphors for high temperature thermometry Entwicklung neuer Leuchtstoffe für die Hochtemperatur- Thermometrie Der Technischen Fakultät der Friedrich-Alexander Universität Erlangen-Nürnberg DISSERTATION zur Erlangung des Doktorgrades Doktor-Ingenieur vorgelegt von Liudmyla Chepyga aus Myhove (Ukraine) Erlangen, Dezember 2018 Als Dissertation genehmigt von der Technischen Fakultät der Friedrich-Alexander-Universität Erlangen-Nürnberg Tag der mündlichen Prüfung: 10.12.2018. Vorsitzende des Promotionsorgans: Prof. Dr. Reinhard Lerch 1. Gutachter: Priv.-Doz. Dr. Miroslaw Batentschuk 2. Gutachter: Prof. Dr. Dominique de Ligny ii To my parents Mykola and Valentyna Chepyga, beloved sister Olena and my teacher of chemistry Tarnavska Liudmyla Iurijvna “To strive, to seek, to find and not to yield” (Alfred, Lord Tennyson) iii Statutory declaration I declare on oath that I have written the present dissertation independently and without outside help and I have not used any sources or aids other than those specified. Liudmyla Chepyga iv Acknowledgements I want to thank Prof. Dr. Christoph J. Brabec for the invitation to join his working group, for very interesting research topic and providing excellent experimental facilities. An additional gratitude for his favor a friendly group atmosphere. The results in this thesis were obtained in the frame of my activity as a Ph.D. student at the Institute of Materials for Electronics and Energy Technology (i-MEET) at Friedrich- Alexander-University Erlangen-Nuremberg, under the supervision of Priv.-Doz. Dr. Miroslaw Batentschuk. The dissertation would not have been completed without a financial support from the Bavarian Research Foundation (BFS) (DOK-170-14), and the Erlangen Graduate School in Advanced Optical Technologies (SAOT), which is funded by the German Research Foundation (DFG) within the framework of the Excellence Initiative of the German Federal and State Governments to Promote Science and Research at German Universities.
    [Show full text]
  • Laser-Induced Phosphor Thermometry - Feasibility and Precision in Combustion Applications
    Laser-Induced Phosphor Thermometry - Feasibility and Precision in Combustion Applications Lindén, Johannes 2012 Link to publication Citation for published version (APA): Lindén, J. (2012). Laser-Induced Phosphor Thermometry - Feasibility and Precision in Combustion Applications. Total number of authors: 1 General rights Unless other specific re-use rights are stated the following general rights apply: Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal Read more about Creative commons licenses: https://creativecommons.org/licenses/ Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. LUND UNIVERSITY PO Box 117 221 00 Lund +46 46-222 00 00 Laser-Induced Phosphor Thermometry Feasibility and precision in combustion applications Johannes Lindén Copyright © Johannes Lindén Lund Report on Combustion Physics, LRCP-154 ISBN 978-91-7473-361-7 ISSN 1102-8718 ISRN LUTFD2/TFCP-154-SE
    [Show full text]
  • Implementation of an Ultra-Bright Thermographic Phosphor for Gas Turbine Engine Temperature Measurements
    NASA/TM—2014-218418 Implementation of an Ultra-Bright Thermographic Phosphor for Gas Turbine Engine Temperature Measurements Jeffrey I. Eldridge, Timothy J. Bencic, and Dongming Zhu Glenn Research Center, Cleveland, Ohio Michael D. Cuy Vantage Partners, LLC, Brook Park, Ohio Douglas E. Wolfe Pennsylvania State University, University Park, Pennsylvania Stephen W. Allison and David L. Beshears Emerging Measurements, Knoxville, Tennessee Thomas P. Jenkins Metrolaser, Laguna Hills, California Bauke Heeg Lumium, Leeuwarden, The Netherlands Robert P. Howard and Andrew Alexander Aerospace Testing Alliance, Arnold Air Force Base, Tennessee December 2014 NASA STI Program . in Profi le Since its founding, NASA has been dedicated to the • CONFERENCE PUBLICATION. Collected advancement of aeronautics and space science. The papers from scientifi c and technical NASA Scientifi c and Technical Information (STI) conferences, symposia, seminars, or other program plays a key part in helping NASA maintain meetings sponsored or cosponsored by NASA. this important role. • SPECIAL PUBLICATION. Scientifi c, The NASA STI Program operates under the auspices technical, or historical information from of the Agency Chief Information Offi cer. It collects, NASA programs, projects, and missions, often organizes, provides for archiving, and disseminates concerned with subjects having substantial NASA’s STI. The NASA STI program provides access public interest. to the NASA Aeronautics and Space Database and its public interface, the NASA Technical Reports • TECHNICAL TRANSLATION. English- Server, thus providing one of the largest collections language translations of foreign scientifi c and of aeronautical and space science STI in the world. technical material pertinent to NASA’s mission. Results are published in both non-NASA channels and by NASA in the NASA STI Report Series, which Specialized services also include organizing includes the following report types: and publishing research results, distributing specialized research announcements and feeds, • TECHNICAL PUBLICATION.
    [Show full text]
  • Application of Phosphor Thermometry to a Galvanneal Temperature Measurement System*
    Application of Phosphor Thermometry to a Galvanneal Temperature Measurement System* David L. Beshears, S. W. Allison, William H. Andrews, Michael R. Cates, Eric B. Grann, Wayne W. Manges, Timothy J. McIntyre, Matthew B. Scudiere, Marc L. Simpson, Robert M. Childs Oak Ridge National Laboratory P. O. Box 2009 Oak Ridge, Tennessee 37831-8058 USA Phone:(423) 576-0175 Fax: (423) 576-0279 Joe Vehec Liwei Zhang Advanced Process Control Technical Center The American Iron and Steel Institute National Steel Corp 247 Fort Pitt Boulevard, 2nd Floor 1745 Fritz Drive Pittsburgh, Pennsylvania 15222 USA Trenton, Michigan 48183-2147 USA Phone: (412) 566-2322 Phone: (734) 676-8080 Fax: (412) 566-2330 Fax: (734) 676-2030 ABSTRACT The Galvanneal Temperature Measurement System (GTMS) was developed for the American Iron and Steel Institute by the Oak Ridge National Laboratory through a partnership with the National Steel Midwest Division in Portage, Indiana. The GTMS provides crucial on-line thermal process control information during the manufacturing of galvanneal steel. The system has been used with the induction furnaces to measure temperatures ranging from 450 to 700°C with an accuracy of better than +/-5°C. The GTMS provides accurate, reliable temperature information thus ensuring a high quality product, reducing waste, and saving energy. The production of uniform, high-quality galvanneal steel is only possible through strict temperature control. * Prepared by the Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831•8058, managed by Lockheed Martin Energy Research Corporation, for the U. S. Department of Energy under contract DE•AC05•960R22464. The submitted manuscript has been authored by a contractor of the U.
    [Show full text]
  • Development of Phosphor Thermometry Systems for Use in Development Gas Turbine Engines
    Development of phosphor thermometry systems for use in development gas turbine engines A thesis submitted to the University of Manchester for the degree of Doctor of Engineering in the faculty of Engineering and Physical Sciences 2011 Ashiq Hussain Khalid School of Mechanical, Aerospace and Civil Engineering Faculty of Engineering and Physical Sciences University of Manchester A. Khalid Contents Contents 2 List of Tables 6 List of Figures 8 Nomenclature 18 Abstract 22 Declaration 23 Copyright Statement 23 Acknowledgements 24 About the Author 25 1 INTRODUCTION 26 1.1 Overview of the Engineering Doctorate Programme 26 1.2 Background 27 1.3 Aims and Objectives 27 1.4 Thesis Structure 28 2 MOTIVATIONS FOR PHOSPHOR THERMOMETRY IN AERO-ENGINES 30 2.1 Temperature measurement in aero-engines 30 2.1.1 Characterisation of Engine Sensors Types 30 2.1.2 Research into improved engine efficiency 32 2.1.3 The role of accurate temperature measurement 35 2.1.4 Verification / Design tool 38 2.1.5 Health Monitoring / Engine Control 38 2.1.6 Summary 39 2.2 Review of the existing methods for surface temperature measurement inside aeroengines 39 2.2.1 Introduction 39 2.2.2 Thermocouples and RTDs (contact sensors) 39 2.2.3 Radiation Pyrometry 41 2.2.4 Thermal Paints and Thermal Melts 43 2.2.5 Summary 44 2.3 Capability shortfalls, gaps & requirements analysis 47 3 LUMINESCENCE THERMOMETRY 57 3.1 Introduction 57 3.2 Historical Context 57 3.3 Principles of Luminescence 59 3.3.1 Generic Luminescence Behaviour 59 3.3.2 Luminescence in Phosphors 62 - 2 - A.
    [Show full text]
  • REVIEW ARTICLE Remote Thermometry with Thermographic
    REVIEW ARTICLE Remote thermometry with thermographic phosphors: Instrumentation and applications S. W. Allisona) Engineering Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-7280 G. T. Gilliesb) Department of Mechanical, Aerospace, and Nuclear Engineering, University of Virginia, Charlottesville, Virginia 22901 ~Received 12 July 1996; accepted for publication 8 April 1997! The temperature-dependent characteristics of fluorescence of several rare-earth-doped ceramic phosphors has made these materials the focus of a major effort in the field of noncontact thermometry over the past few decades. These ‘‘thermographic phosphors,’’ e.g., Y2O3 :Eu, have been used for remote measurements of the temperatures of both static and moving surfaces, and have performed many other tasks that standard sensors ~thermocouples, thermistors, etc.! cannot. The range of usefulness of this class of materials extends from cryogenic temperatures to those approaching 2000 °C. The instrumentation needed for this type of thermometry has followed many different lines of development, and this evolution has produced a wide variety of both field- and laboratory-grade systems that are now described in the literature. In general, the technique offers high sensitivity ('0.05 °C), robustness ~e.g., stability of the sensor sample in harsh environments!, and NIST traceability. In addition, such systems have been successfully adapted to make remotely sensed measurements of pressure, heat flux, shear stress, and strain. In this review, we summarize the physical mechanisms that form the basis for the technique, and then catalog and discuss the instrumentation-related aspects of several different remote thermometry systems that employ thermographic phosphors as the sensors. © 1997 American Institute of Physics.
    [Show full text]
  • Characterization of Rare-Earth Doped Thermal Barrier Coatings for Phosphor Thermometry
    University of Central Florida STARS Electronic Theses and Dissertations, 2004-2019 2019 Characterization of Rare-earth Doped Thermal Barrier Coatings for Phosphor Thermometry Quentin Fouliard University of Central Florida Part of the Aerospace Engineering Commons Find similar works at: https://stars.library.ucf.edu/etd University of Central Florida Libraries http://library.ucf.edu This Doctoral Dissertation (Open Access) is brought to you for free and open access by STARS. It has been accepted for inclusion in Electronic Theses and Dissertations, 2004-2019 by an authorized administrator of STARS. For more information, please contact [email protected]. STARS Citation Fouliard, Quentin, "Characterization of Rare-earth Doped Thermal Barrier Coatings for Phosphor Thermometry" (2019). Electronic Theses and Dissertations, 2004-2019. 6869. https://stars.library.ucf.edu/etd/6869 CHARACTERIZATION OF RARE-EARTH DOPED THERMAL BARRIER COATINGS FOR PHOSPHOR THERMOMETRY by QUENTIN FOULIARD B.S. Ecole´ Polytechnique de l’Universite´ de Nantes, 2014 M.S. Ecole´ Polytechnique de l’Universite´ de Nantes, 2016 A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Mechanical and Aerospace Engineering in the College of Engineering and Computer Science at the University of Central Florida Orlando, Florida Fall Term 2019 Major Professor: Seetha Raghavan c 2019 Quentin Fouliard ii ABSTRACT Thermal Barrier Coatings have been extensively used to protect and insulate the metal- lic components in turbine engines from extreme environments to achieve higher turbine inlet temperatures, resulting in an increase in combined engine cycle efficiency, lower- ing NOx emissions and fuel consumption. Additionally, as the major failure mechanisms determining lifetime are thermally activated during engine operation, uncertainty in tem- perature measurements affects lifetime prediction.
    [Show full text]
  • Doped Oxides for High-Temperature Luminescence and Lifetime Thermometry
    ANRV380-MR39-14 ARI 27 May 2009 15:44 Doped Oxides for High-Temperature Luminescence and Lifetime Thermometry M.D. Chambers1 and D.R. Clarke2 1Materials Department, College of Engineering, University of California, Santa Barbara, California 91360-5050; email: [email protected] 2School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 Annu. Rev. Mater. Res. 2009. 39:325–59 Key Words The Annual Review of Materials Research is online at thermal barrier coating, environmental barrier coating, rare earths, decay, matsci.annualreviews.org zirconia, silicates This article’s doi: 10.1146/annurev-matsci-112408-125237 Abstract Access provided by Harvard University on 04/26/17. For personal use only. Copyright c 2009 by Annual Reviews. The measurement of high temperatures in oxides and oxide-based structures All rights reserved Annu. Rev. Mater. Res. 2009.39:325-359. Downloaded from www.annualreviews.org in practical applications often presents challenges including steep thermal 1531-7331/09/0804-0325$20.00 gradients, the presence of flames or chemically aggressive environments, and the transparency or translucency of most oxides. For turbine engines, oxide coatings are of great commercial importance, and the rapid motion of parts prohibits contact thermometry. Luminescence thermometry offers a number of advantages for measuring temperature in such systems and has been the subject of ongoing study for many years. Recent work on rare- earth-doped thermal barrier coatings, environmental barrier coatings, and related oxides has demonstrated the feasibility of luminescence thermometry to temperatures well in excess of 1000◦C. The luminescent properties of these materials and the analytical techniques used to extract reproducible temperature measurements from the measured luminescence are reviewed.
    [Show full text]
  • Depth-Selective Diagnostics of Thermal Barrier Coatings Incorporating Thermographic Phosphors
    DEPTH-SELECTIVE DIAGNOSTICS OF THERMAL BARRIER COATINGS INCORPORATING THERMOGRAPHIC PHOSPHORS Jeffrey 1. Eldridge and Timothy J. Bencic Stephen W. Allison and David L. Beshears NASA Glenn Research Center Oak Ridge National Laboratory Cleveland, OR 44135 Oak Ridge, TN 37831 KEYWORDS Thermal Barrier Coatings, Thermographic Phosphors, Temperature Measurement ABSTRACT Thermographic phosphors have been previously demonstrated to provide effective non-contact, errussivity-independent surface temperature measurements. Because of the translucent nature of thermal barrier coatings (TBCs), thermograpruc-phosphor-based temperature measurements can be extended beyond the surface to provide depth-selective temperature measurements by incorporating the thermograpruc phosphor layer at the depth where the temperature measurement is desired. In this paper, thermographic phosphor (Y20 3:Eu) fluorescence decay time measurements are demonstrated for the first time to provide through-the-coating-thickness temperature readings up to lOOO°C with the phosphor layer residing beneath a lOO-/-lm-thick TBC (plasma-sprayed 8wt% yttria-stabilized zirconia). With an appropriately chosen excitation wavelength and detection configuration, it is shown that sufficient phosphor errussion is generated to provide effective temperature measurements, despite the attenuation of both the excitation and errussion intensities by the overlying TBC. This depth-selective temperature measurement capability should prove particularly useful for TBC diagnostics, where a large thermal
    [Show full text]
  • Laser-Induced Phosphor Thermometry - Feasibility and Precision in Combustion Applications
    Laser-Induced Phosphor Thermometry - Feasibility and Precision in Combustion Applications Lindén, Johannes 2012 Link to publication Citation for published version (APA): Lindén, J. (2012). Laser-Induced Phosphor Thermometry - Feasibility and Precision in Combustion Applications. Total number of authors: 1 General rights Unless other specific re-use rights are stated the following general rights apply: Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal Read more about Creative commons licenses: https://creativecommons.org/licenses/ Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. LUND UNIVERSITY PO Box 117 221 00 Lund +46 46-222 00 00 Laser-Induced Phosphor Thermometry Feasibility and precision in combustion applications Johannes Lindén Copyright © Johannes Lindén Lund Report on Combustion Physics, LRCP-154 ISBN 978-91-7473-361-7 ISSN 1102-8718 ISRN LUTFD2/TFCP-154-SE
    [Show full text]
  • Development of Fluorescent Coatings for High Temperature Aerospace Applications
    DEVELOPMENT OF FLUORESCENT COATINGS FOR HIGH TEMPERATURE AEROSPACE APPLICATIONS W.A. Hollerman*, S.W. Allison**, D.L. Beshears**, R.F. Guidry*, T.J. Bencic†, C.R. Mercer†, J.I. Eldridge††, M.R. Cates**, P. Boudreaux*, and S.M. Goedeke§ * Department of Physics, University of Louisiana at Lafayette, P.O. Box 44210, Lafayette, LA 70504 ** Oak Ridge National Laboratory (ORNL), National Transportation Research Center (NTRC), 2360 Cherahala Blvd., MS-6472, Knoxville, TN 37932 † Optical Instrumentation Technology Branch, NASA John H. Glenn Research Center at Lewis Field, 21000 Brookpark Road, Mailstop 77-1, Cleveland, OH 44135-3191 †† Environmental Durability Branch, NASA John H. Glenn Research Center at Lewis Field, 21000 Brookpark Road, Cleveland, OH 44135 § Department of Mechanical Engineering, Tennessee Technological University, Cookeville, TN 38505 ABSTRACT For many years, phosphor thermometry has been used for non-contact measurements in hostile high temperature environments, including large blackbody radiation backgrounds, vibration, rotation, fire/flame, pressure, or noise. Often these environments restrict the use of more common thermocouples or infrared thermometric techniques. In particular, temperature measurements inside jet turbines, rocket engines, or similar devices are especially amenable to fluorescence techniques. Often the fluorescent materials are used as powders, either suspended in binders and applied like paint or applied as high temperature sprays. These coatings will quickly assume the same temperature as the surface to which they are applied. The temperature dependence of fluorescent materials is a function of the base matrix atoms and a small quantity of added activator or “dopant” ions. Often for high temperature applications, the selected materials are refractory and include rare earth ions.
    [Show full text]