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Development of a Reliable Performance Gas Generator of 75 Tonf-Class Liquid Rocket Engine for the Korea Space Launch Vehicle II
DOI: 10.13009/EUCASS2019-521 8TH EUROPEAN CONFERENCE FOR AERONAUTICS AND SPACE SCIENCES (EUCASS) Development of a Reliable Performance Gas Generator of 75 tonf-class Liquid Rocket Engine for the Korea Space Launch Vehicle II Byoungjik Lim*, Munki Kim*, Donghyuk Kang*, Hyeon-Jun Kim*, Jong-Gyu Kim*, and Hwan-Seok Choi* *Korea Aerospace Research Institute 169-84, Gwahak-ro, Yuseong-Gu Daejeon, 34133, South Korea [email protected] Abstract In this paper, development history and result of a reliable performance gas generator of 75 tonf-class liquid rocket engine is described. Based on the experience acquired from the 30 tonf-class gas generator development, the almost identical concept was adopted to 75 tonf-class gas generator such as a coaxial swirl injector and a regeneratively cooled combustion chamber. During the entire development process using the full-scale and subscale technological demonstration model and development model up to now, combustion tests of over 430 times and cumulative time of over 17 700 seconds have been carried out for a 75 tonf-class gas generate. Now the 75 tonf-class fuel-rich gas generator shows very reliable and reproducible characteristics throughout the entire lifetime including the flight test which was done with the test launch vehicle in November 2018. Thus, it can be said that the development of a 75 tonf-class fuel rich gas generator which will be used in Korea first independent space launch vehicle, KSLV-II was finished successfully. 1. Introduction As a leading institute for technology which is related with space launch vehicle and a national space development agency in the Republic of KOREA, the Korea Aerospace Research Institute (KARI) has been continuously researching and developing technology related to space launch vehicles since establishment in 1989. -
FIC-Prop-65-Notice-Reporter.Pdf
FIC Proposition 65 Food Notice Reporter (Current as of 9/25/2021) A B C D E F G H Date Attorney Alleged Notice General Manufacturer Product of Amended/ Additional Chemical(s) 60 day Notice Link was Case /Company Concern Withdrawn Notice Detected 1 Filed Number Sprouts VeggIe RotInI; Sprouts FruIt & GraIn https://oag.ca.gov/system/fIl Sprouts Farmers Cereal Bars; Sprouts 9/24/21 2021-02369 Lead es/prop65/notIces/2021- Market, Inc. SpInach FettucIne; 02369.pdf Sprouts StraIght Cut 2 Sweet Potato FrIes Sprouts Pasta & VeggIe https://oag.ca.gov/system/fIl Sprouts Farmers 9/24/21 2021-02370 Sauce; Sprouts VeggIe Lead es/prop65/notIces/2021- Market, Inc. 3 Power Bowl 02370.pdf Dawn Anderson, LLC; https://oag.ca.gov/system/fIl 9/24/21 2021-02371 Sprouts Farmers OhI Wholesome Bars Lead es/prop65/notIces/2021- 4 Market, Inc. 02371.pdf Brad's Raw ChIps, LLC; https://oag.ca.gov/system/fIl 9/24/21 2021-02372 Sprouts Farmers Brad's Raw ChIps Lead es/prop65/notIces/2021- 5 Market, Inc. 02372.pdf Plant Snacks, LLC; Plant Snacks Vegan https://oag.ca.gov/system/fIl 9/24/21 2021-02373 Sprouts Farmers Cheddar Cassava Root Lead es/prop65/notIces/2021- 6 Market, Inc. ChIps 02373.pdf Nature's Earthly https://oag.ca.gov/system/fIl ChoIce; Global JuIces Nature's Earthly ChoIce 9/24/21 2021-02374 Lead es/prop65/notIces/2021- and FruIts, LLC; Great Day Beet Powder 02374.pdf 7 Walmart, Inc. Freeland Foods, LLC; Go Raw OrganIc https://oag.ca.gov/system/fIl 9/24/21 2021-02375 Ralphs Grocery Sprouted Sea Salt Lead es/prop65/notIces/2021- 8 Company Sunflower Seeds 02375.pdf The CarrIngton Tea https://oag.ca.gov/system/fIl CarrIngton Farms Beet 9/24/21 2021-02376 Company, LLC; Lead es/prop65/notIces/2021- Root Powder 9 Walmart, Inc. -
High Purity Inorganics
High Purity Inorganics www.alfa.com INCLUDING: • Puratronic® High Purity Inorganics • Ultra Dry Anhydrous Materials • REacton® Rare Earth Products www.alfa.com Where Science Meets Service High Purity Inorganics from Alfa Aesar Known worldwide as a leading manufacturer of high purity inorganic compounds, Alfa Aesar produces thousands of distinct materials to exacting standards for research, development and production applications. Custom production and packaging services are part of our regular offering. Our brands are recognized for purity and quality and are backed up by technical and sales teams dedicated to providing the best service. This catalog contains only a selection of our wide range of high purity inorganic materials. Many more products from our full range of over 46,000 items are available in our main catalog or online at www.alfa.com. APPLICATION FOR INORGANICS High Purity Products for Crystal Growth Typically, materials are manufactured to 99.995+% purity levels (metals basis). All materials are manufactured to have suitably low chloride, nitrate, sulfate and water content. Products include: • Lutetium(III) oxide • Niobium(V) oxide • Potassium carbonate • Sodium fluoride • Thulium(III) oxide • Tungsten(VI) oxide About Us GLOBAL INVENTORY The majority of our high purity inorganic compounds and related products are available in research and development quantities from stock. We also supply most products from stock in semi-bulk or bulk quantities. Many are in regular production and are available in bulk for next day shipment. Our experience in manufacturing, sourcing and handling a wide range of products enables us to respond quickly and efficiently to your needs. CUSTOM SYNTHESIS We offer flexible custom manufacturing services with the assurance of quality and confidentiality. -
Re-Engining Competitors Vie to Keep These U.S. Nuclear, Conventional Workhorses fl Ying Past 2050 PAGE 24
HUMAN SPACEFLIGHT 18 Q&A 14 WEATHER FORECASTING 32 The year of Commercial Crew OneWeb’s satellite maker Radio occultation explained Re-engining competitors vie to keep these U.S. nuclear, conventional workhorses fl ying past 2050 PAGE 24 FEBRUARY 2019 | A publication of the American Institute of Aeronautics and Astronautics | aerospaceamerica.aiaa.org AIAA CONGRESSIONAL WEDNESDAY, 20 MARCH VISITS DAY Advocate for Aerospace on Capitol Hill Every year, AIAA members—engineers, scientists, researchers, students, educators, and technology executives—travel to Washington, DC, for a day of advocacy and awareness with national decision makers. Spend a day meeting with new and established congressional members and their staff. Your participation, enthusiasm, and passion remind our lawmakers that aerospace is a key component of an economically strong and secure nation. If you are interested in the future of your profession, the advancement of technology, the furthering of scientific research, and the strengthening of our nation’s security, this event is for you! Travel subsidies are available Participating in CVD was like getting a bird’s eye view of a grand and magnificent “ national aerospace project. I knew that my contribution might be small, but being a voice of the aerospace community filled my heart with immense pride and humility at the same time. RUCHIR GOSWAMI PhD Candidate Iowa State University ” REGISTER NOW aiaa.org/CVD2019 FEATURES | February 2019 MORE AT aerospaceamerica.aiaa.org U.S. Air U.S. Force 18 32 40 24 Commercial Radio occultation The cost of New engines Crew’s payoff is put to the test aerospace NASA looks to 2019 Entrepreneurs aim advances as the year it might to prove that the for the B-52 An aerospace expert be liberated from technique is accurate gives his take on The U.S. -
Mr. Soon-Young Park Korea Aerospace Research Institute (KARI), Korea, Republic Of, [email protected]
70th International Astronautical Congress 2019 Paper ID: 50565 IAF SPACE PROPULSION SYMPOSIUM (C4) Propulsion System (1) (1) Author: Mr. Soon-Young Park Korea Aerospace Research Institute (KARI), Korea, Republic of, [email protected] Dr. Yoonwan Moon Korea Aerospace Research Institute (KARI), Korea, Republic of, [email protected] Dr. Hwan-Seok CHOI Korea Aerospace Research Institute (KARI), Korea, Republic of, [email protected] Dr. Chang Ho Choi Korea Aerospace Research Institute (KARI), Korea, Republic of, [email protected] Dr. Sangyeop Han Korea Aerospace Research Institute (KARI), Korea, Republic of, [email protected] Dr. Yeoung-Min Han Korea Aerospace Research Institute (KARI), Korea, Republic of, [email protected] Dr. Jinhan Kim Korea Aerospace Research Institute (KARI), Korea, Republic of, [email protected] DEVELOPMENT STATUS OF BOOSTER STAGE LIQUID ROCKET ENGINE OF KSLV-II PROGRAM Abstract South Korea's indigenous three-staged liquid propellant rocket Korea Space Launch Vehicle-II (KSLV- II) also known as Nuri is now developing by Korea Aerospace Research Institute (KARI). KSLV-II planned to launch into space in 2021 at the NARO Space Center located the southern coast of Korea peninsular. Both the booster stage and the second stage of KSLV-II are propelled by the newly developing 75-tonf thrust level liquid-propellant rocket engines (KRE-075) and the third stage is powered by a 7-tonf thrust level rocket engine (KRE-007). KRE-075 fueled by kerosene and liquid oxygen which have some heritage of predecessor LV (KSR-III and KSLV-I). For the simplicity of its design and the parallel development logic to reduce the development schedule of the key components such as combustion chamber and turbopump, we adopted the reliable gas-generator cycle. -
10Th IAASS Conference - Making Safety Happen Date: Wednesday, 15/May/2019 8:30Am - 10:30Am P1: Plenary Session 1
03042019 Conference Agenda 10th IAASS Conference - Making Safety Happen Date: Wednesday, 15/May/2019 8:30am - 10:30am P1: Plenary Session 1 10:30am - 11:00am Coffee Break 11:00am - 12:30pm S-01: Re-entry Safety - I Effect of Latitude Bias in Entry Angle on Ground Casualty Risk from Naturally Decaying Space Objects Chris Ostrom NASA Orbital Debris Program Office / HX5, United States of America Seasonal- and Beta-Angle-Dependent Latitude Bias Variations in Natural Decays John Bartlett Bacon NASA, United States of America Probabilistic casualty risk assessment and labeling for the re-entry of spacecraft components Tobias Lips, Patrik Kärräng HTG GmbH, Germany Update of the Ariane 5 EPC test case with the Fragmentation and survivability tool suite of ArianeGroup Célia Finzi, Grégory Pinaud, Charles Bertorello, Jean-Marc Bouilly, Laurent Chevalier ARIANEGROUP, France 11:00am - 12:30pm S-02: Human Performance for Safety & Organizational Culture - I Capability Considerations for Enhancing Safety on Long Duration Manned Missions: Insights from a Technical Interchange Meeting on Autonomous Crew Operations Shu-Chieh Wu1,2, Alonso H. Vera2 1San Jose State University, United States of America; 2NASA Ames Research Center, United States of America Addressing Rapid Mobilization and Evacuation During Large-Group Commercial Spaceflight Emergencies Victor Armando Kitmanyen University of Houston, USA Fatigue Management for Risk Reduction David Fuller NASA, United States of America Safety on site - Operating a test facility for a Flight Stage Michael Dommers, Andreas Haberzettl DLR, Germany 03042019 11:00am - 12:30pm S-03: Nuclear Space Safety OVERVIEW OF THE ISSUES RELATED TO THE USE OF RADIOISOTOPE POWER SYSTEMS IN EUROPEAN SPACE MISSIONS Christophe Fongarland1, Cédric Lemarié1, Laurent Jourdainne2, Alessandra Barco3, Richard Ambrosi3, Keith Stephenson4 1ArianeGroup, France; 2Arianespace, France; 3University of Leicester - Dept. -
Introduction to the Special Issue on Acoustics of Rockets 로켓의 음향학 특집호 소개
한국음향학회지 제39권 제4호 pp. 319~321 (2020) The Journal of the Acoustical Society of Korea Vol.39, No.4 (2020) pISSN : 1225-4428 eISSN : 2287-3775 Introduction to the special issue on acoustics of rockets 로켓의 음향학 특집호 소개 Won-Suk Ohm1 and Taeyoung Park1 (엄원석,1 박태영1) 1School of Mechanical Engineering, Yonsei University I. Introduction distant future. As the tectonic shift toward cheaper rockets and space The word “rocket” conjures up so much imagination travel is already underway, two things should be abundantly and awe in the psyche of the general public and the clear to acousticians, especially those young aspiring specialists alike. If one ever watches a rocket launch, it is researchers who wish to make notable contributions to the very hard to not be impressed by the thunderous roar of the advancement of acoustics. First, on a practical level, time rocket, spewing enormous flames and smokes as it soars to will come when there is a strong demand to combat a new the outer space. For acousticians, a rocket launch is one of kind of noise pollution due to rocket launch and landing. the most intense man-made acoustic events, the sound Currently, rocket noise can pose a design issue for its power level of which could reach up to 200 dB (re 1 pW) as damaging effects on rockets, payloads, and launch pads, in the case of the Saturn V rocket. but is of minor concern from the community noise per- Although the sounds of rockets are as conspicuous as spective because most launch facilities are located in any man-made sound can be, the exact physical mecha- remote, unpopulated areas. -
Causes of War Prospects for Peace
Georgian Orthodox Church Konrad-Adenauer-Stiftung CAUSES OF WAR PROS P E C TS FOR PEA C E Tbilisi, 2009 1 On December 2-3, 2008 the Holy Synod of the Georgian Orthodox Church and the Konrad-Adenauer-Stiftung held a scientific conference on the theme: Causes of War - Prospects for Peace. The main purpose of the conference was to show the essence of the existing conflicts in Georgia and to prepare objective scientific and information basis. This book is a collection of conference reports and discussion materials that on the request of the editorial board has been presented in article format. Publishers: Metropolitan Ananya Japaridze Katia Christina Plate Bidzina Lebanidze Nato Asatiani Editorial board: Archimandrite Adam (Akhaladze), Tamaz Beradze, Rozeta Gujejiani, Roland Topchishvili, Mariam Lordkipanidze, Lela Margiani, Tariel Putkaradze, Bezhan Khorava Reviewers: Zurab Tvalchrelidze Revaz Sherozia Giorgi Cheishvili Otar Janelidze Editorial board wishes to acknowledge the assistance of Irina Bibileishvili, Merab Gvazava, Nia Gogokhia, Ekaterine Dadiani, Zviad Kvilitaia, Giorgi Cheishvili, Kakhaber Tsulaia. ISBN 2345632456 Printed by CGS ltd 2 Preface by His Holiness and Beatitude Catholicos-Patriarch of All Georgia ILIA II; Opening Words to the Conference 5 Preface by Katja Christina Plate, Head of the Regional Office for Political Dialogue in the South Caucasus of the Konrad-Adenauer-Stiftung; Opening Words to the Conference 8 Abkhazia: Historical-Political and Ethnic Processes Tamaz Beradze, Konstantine Topuria, Bezhan Khorava - A -
Fscl Presidents Fall 2020
FSCL PRESIDENTS FALL 2020 Interfraternity Council Oranization Name Email Acacia Aaron Varnau [email protected] Alpha Chi Rho James Moeller [email protected] Alpha Epsilon Pi Roey Kleiman [email protected] Alpha Gamma Rho Jaden Retter [email protected] Alpha Sigma Phi Stafford Babbitt [email protected] Alpha Tau Omega Drew Bruns [email protected] Beta Chi Theta Matt Thomas [email protected] Beta Sigma Psi Chris Mikeworth [email protected] Beta Theta Pi Ethan Pio [email protected] Beta Upsilon Chi Paul McDonald [email protected] Delta Sigma Phi Lucas Tyler [email protected] Delta Tau Delta Theodore Lester [email protected] Evans Scholars Hannah Hill [email protected] FarmHouse Wyatt Law [email protected] Kappa Alpha Order Jonathan Andrews [email protected] Kappa Delta Rho Michael Storrs [email protected] Kappa Sigma Kevin Boes [email protected] Lambda Chi Alpha Matt Mills [email protected] Phi Delta Theta Jacob Schmidel [email protected] Phi Gamma Delta Andrew Bettner [email protected] Phi Kappa Psi Sam Enweonwu [email protected] Phi Kappa Sigma Hassan Chaudry [email protected] Phi Kappa Tau Kendall Soares [email protected] Phi Sigma Kappa Nick Wegh [email protected] Pi Kappa Alpha Jordan Jones [email protected] Pi Kappa Phi Erik Wilson [email protected] Pi Lambda Phi Dominik Rafinski [email protected] Psi Upsilon Nikolas Damalas [email protected] Sigma Alpha Epsilon -
Morphological and Electrical Properties of Nickel Based Ohmic Contacts Formed by Laser Annealing Process on N-Type 4H-Sic
Preprint – Manuscript submitted to Materials Science in Semiconductor Processing (November 20, 2018) Morphological and electrical properties of Nickel based Ohmic contacts formed by laser annealing process on n-type 4H-SiC S. Rascunà 1*, P. Badalà 1, C. Tringali 1, C. Bongiorno 2, E. Smecca 2, A. Alberti 2, S. Di Franco 2, F. Giannazzo 2, G. Greco 2, F. Roccaforte 2, M. Saggio 1 1 STMicroelectronics SRL, Stradale Primosole 50, 95121 Catania, Italy 2 Consiglio Nazionale delle Ricerche – Istituto per la Microelettronica e Microsistemi (CNR-IMM), Strada VIII, n.5 Zona Industriale, I-95121 Catania, Italy (*) Corresponding author: [email protected], For the n-type SiC, annealed Ni-films are Abstract. This work reports on the commonly used to form nickel silicide (Ni 2Si) morphological and electrical properties of Ni- back-side Ohmic contacts. Typically, rapid based back-side Ohmic contacts formed by thermal annealing (RTA) exceeding 900°C laser annealing process for SiC power diodes. are used to achieve an Ohmic behavior [3]. Nickel films, 100 nm thick, have been However, today there is the need to replace sputtered on the back-side of heavily doped the conventional thermal annealing by laser 110 µm 4H-SiC thinned substrates after annealing processes carried out on the back- mechanical grinding. Then, to achieve Ohmic side of thinned wafers at the end of the behavior, the metal films have been irradiated fabrication flow [4]. with an UV excimer laser with a wavelength In Fig. 1, a schematic of a standard flow of 310 nm, an energy density of 4.7 J/cm 2 and chart (with and without grinding step) for the pulse duration of 160 ns. -
Spring 2021 TE TA UN S E ST TH at I F E V a O O E L F a DITAT DEUS
Commencement 2021 Spring 2021 TE TA UN S E ST TH AT I F E V A O O E L F A DITAT DEUS N A E R R S I O Z T S O A N Z E I A R I T G R Y A 1912 1885 ARIZONA STATE UNIVERSITY COMMENCEMENT AND CONVOCATION PROGRAM Spring 2021 May 3, 2021 THE NATIONAL ANTHEM CONTENTS THE STAR-SPANGLED BANNER The National Anthem and O say can you see, by the dawn’s early light, Arizona State University Alma Mater ................................. 2 What so proudly we hailed at the twilight’s last gleaming? Whose broad stripes and bright stars through the perilous fight Letter of Congratulations from the Arizona Board of Regents ............... 5 O’er the ramparts we watched, were so gallantly streaming? History of Honorary Degrees .............................................. 6 And the rockets’ red glare, the bombs bursting in air Gave proof through the night that our flag was still there. Past Honorary Degree Recipients .......................................... 6 O say does that Star-Spangled Banner yet wave Conferring of Doctoral Degrees ............................................ 9 O’er the land of the free and the home of the brave? Sandra Day O’Connor College of Law Convocation ....................... 29 ALMA MATER Conferring of Masters Degrees ............................................ 36 ARIZONA STATE UNIVERSITY Craig and Barbara Barrett Honors College ................................102 Where the bold saguaros Moeur Award ............................................................137 Raise their arms on high, Praying strength for brave tomorrows Graduation with Academic Recognition ..................................157 From the western sky; Summa Cum Laude, 157 Where eternal mountains Magna Cum Laude, 175 Kneel at sunset’s gate, Cum Laude, 186 Here we hail thee, Alma Mater, Arizona State. -
Wide Gap Braze Repairs of Nickel Superalloy Gas Turbine Components
WIDE GAP BRAZE REPAIRS OF NICKEL SUPERALLOY GAS TURBINE COMPONENTS by Cheryl Hawk A thesis submitted to the Faculty and Board of Trustees of the Colorado School of Mines in partial fulfillment of the requirements for the degree of Master of Science (Metallurgical and Materials Engineering). Golden, Colorado Date: ______________________ Signed: ______________________________ Cheryl Hawk Signed: ______________________________ Dr. Stephen Liu Thesis Advisor Golden, Colorado Date: ______________________ Signed: ______________________________ Dr. Ivar Reimanis Professor and Head Department of Metallurgical and Materials Engineering ii ABSTRACT The effect of microstructure and processing parameters on the bend properties of wide gap braze repairs has been investigated for BNi-2 and BNi-5 filler metals. BNi-2 braze alloys developed a brittle eutectic constituent that was the source for crack initiation and propagation. BNi-5 braze alloys developed large pores and lack of fusion to the base metal René 108 that decreased the strength of the joint. Three types of crack behaviors were observed within the two braze alloys. (1) Crack initiation and propagation through the brittle eutectic constituent. (2) Crack initiation and propagation through the brittle eutectic constituent/ matrix interface. The crack would propagate through grain boundaries if the eutectic constituent was dispersed. (3) Crack propagation follows type 1 or type 2, but propagated due to a major defect and coalesced with the defect. Braze alloy chemistry was improved by changing the filler metal-additive powder ratio. For the BNi-2 braze alloys, a mixing ratio of 40 wt.% BNi-2 produced the lowest volume percent of the brittle eutectic constituent. These alloys produced the highest strengths.