A Kind of Boundary Layer ‘Flutter’,” Alluding to the Problems of Wing “Flutter.” 7
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Comparison of Theodorsen's Unsteady Aerodynamic Forces with Doublet Lattice Generalized Aerodynamic Forces 5B
NASA/TM–2017-219667 Comparison of Theodorsen’s Unsteady Aerodynamic Forces with Doublet Lattice Generalized Aerodynamic Forces Boyd Perry, III Langley Research Center, Hampton, Virginia September 2017 NASA STI Program . in Profile Since its founding, NASA has been dedicated to the x CONFERENCE PUBLICATION. advancement of aeronautics and space science. The Collected papers from scientific and technical NASA scientific and technical information (STI) conferences, symposia, seminars, or other program plays a key part in helping NASA maintain meetings sponsored or co-sponsored by NASA. this important role. x SPECIAL PUBLICATION. Scientific, The NASA STI program operates under the auspices technical, or historical information from NASA of the Agency Chief Information Officer. It collects, 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 NTRS Registered and its public interface, the NASA Technical Reports Server, thus providing one x TECHNICAL TRANSLATION. of the largest collections of aeronautical and space English-language translations of foreign science STI in the world. Results are published in both scientific and technical material pertinent to non-NASA channels and by NASA in the NASA STI NASA’s mission. Report Series, which includes the following report types: Specialized services also include organizing and publishing research results, distributing x TECHNICAL PUBLICATION. Reports of specialized research announcements and feeds, completed research or a major significant phase of providing information desk and personal search research that present the results of NASA support, and enabling data exchange services. Programs and include extensive data or theoretical analysis. -
FLUID DYNAMICS, Volume IV
http://dx.doi.org/10.1090/psapm/004 PROCEEDINGS OF SYMPOSIA IN APPLIED MATHEMATICS VOLUME IV FLUID DYNAMICS McGRAW-HILL BOOK COMPANY, INC. NEW YORK TORONTO LONDON 1953 FOR THE AMERICAN MATHEMATICAL SOCIETY 80 WATERMAN STREET, PROVIDENCE, RHODE ISLAND PROCEEDINGS OF THE FOURTH SYMPOSIUM IN APPLIED MATHEMATICS OF THE AMERICAN MATHEMATICAL SOCIETY Held at the University of Maryland June 22-23, 1951 COSPONSORED BY THE U.S. NAVAL ORDNANCE LABORATORY M. H. Martin EDITOR EDITORIAL COMMITTEE R. V. Churchill Eric Reissner A. H. Taub Copyright, 1953, by the McGraw-Hill Book Company, Inc. Printed in the United States of America. All rights reserved. This book, or parts thereof, may not be reproduced in any form without permission of the publishers. Library of Congress Catalog Card Number: 52-10326 CONTENTS EDITOR'S PREFACE v Some Aspects of the Statistical Theory of Turbulence 1 BY S. CHANDRASEKHAR A Critical Discussion of Similarity Concepts in Isotropic Turbulence 19 BY C. C. LIN The Nonexistence of Transonic Potential Flow 29 BY ADOLF BUSEMANN On Waves of Finite Amplitude in Ducts (Abstract) 41 BY R. E. MEYER On the Problem of Separation of Supersonic Flow from Curved Profiles .... 47 BY T. Y. THOMAS On the Construction of High-speed Flows 55 BY G. F. CARRIER AND K. T. YEN An Example of Transonic Flow for the Tricomi Gas 61 BY M. H. MARTIN AND W. R. THICKSTUN On Gravity Waves 75 BY A. E. HEINS Hydrodynamics and Thermodynamics 87 BY S. R. DE GROOT Nonuniform Propagation of Plane Shock Waves 101 BY J. M. BURGERS Theory of Propellers 109 BY THEODORE THEODORSEN Numerical Methods in Conformal Mapping 117 BY G. -
;• National Advisory Committee for Aeronautics
I , / ;• NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS REPORT No. 777 THE THEORY OF PROPELLERS Ill-THE SLIPSTREAM CONTRACTION WITH NUMERICAL VALUES FOR TWO-BLADE AND FOUR-BLADE PROPELLERS By THEODORE THEODORSEN 1944 For sale by the Superintendent of Documents - U. S. Government Printing Office - Washington 20, D. C. - Price 20 cents -S.- AERONAUTIC SYMBOLS 1. FUNDAMENTAL AND DERIVED UNITS Metric English Symbol Unit Abbrevia- Abbrevia- uunit t tion Length 1 meter--------------------m foot (or mile) --------- -ft (or mi) Time -------- --t second ----------------- --s second (or hour) ------- --see (or hr) Force---------- F weight of 1 kilogram kg weight of 1 pound-------lb Power ------- - P horsepower (metric) ----- --------— horsepower-------------hp Speed v f kilometers per hour--------kph miles per hour ---------- mph imeters per second ------- -mps feet per second--------- fps 2. GENERAL SYMBOLS W Weight=mg V Kinematic viscosity g Standard acceleration of gravity=9.80665 rn/s 2 p Density (mass per unit volume) or 32.1740 ft/sec' Standard density of dry air, 0.12497 kg-m-'-s' at 15° 0 W M Mass= — and 760 mm; or 0.002378 lb-ft-4 sec' g Specific weight of "standard" air, 1.2255 kg/ml or I Moment of inertia=mk2. (Indicate axis of 0.07651 lb/cu ft radius of gyration k by proper subscript.) Coefficient of viscosity 3. AERODYNAMIC SYMBOLS S Area ill Angle of setting of wings (relative to thrust line) S. Area of wing it Angle of stabilizer setting (relative to thrust 6' Gap line) b Span (7 Resultant moment C Chord Resultant angular velocity V -
Interviw with Homer J. Stewart
HOMER J. STEWART (1915 - 2007) INTERVIEWED BY JOHN L. GREENBERG October-November 1982 INTERVIEWED BY SHIRLEY K. COHEN November 3, 1993 1979 ARCHIVES CALIFORNIA INSTITUTE OF TECHNOLOGY Pasadena, California Subject area Engineering, aeronautical engineering Abstract Two interviews with Homer J. Stewart, aeronautical engineer and Caltech Professor of Aeronautics, 1942-1980, and Caltech alumnus (PhD, 1940). The interview by John L. Greenburg is in four sessions in October and November of 1982. A supplemental interview was conducted by Shirley K. Cohen in November 1993. The first interview covers Stewart’s youth and education (B.Aero.E., University of Minnesota, 1936) and his early interest in aeronautic technology. Comes to Caltech for graduate study in aeronautics, 1936-1940 (PhD, 1940); courses with faculty members W. Smythe, R. C. Tolman, E. T. Bell, M. Ward, H. Bateman. Comments on critical roles of Theodore von Kármán and Clark Millikan in establishment of graduate program known as GALCIT [Guggenheim Aeronautical Laboratory at the California Institute of Technology]; creation of GALCIT wind tunnel for testing; advancement of aeronautical engineering education; and linking of GALCIT to burgeoning California aerospace industry. Von Kármán’s identification of new technologies; his bridging of industry and http://resolver.caltech.edu/CaltechOH:OH_Stewart_H academe; similar integrating approach applied to founding of Jet Propulsion Laboratory [JPL]. Discusses GALCIT’s role in the development of commercial aviation in the 1930s. Appointment to professorial rank (1942) and wartime teaching and research on meteorology; comments on Irving Krick at Caltech. Discusses beginnings of rocketry at Caltech and his own pioneering contributions; work of Frank Malina and H. -
Theodorsen's and Garrick's Computational
https://ntrs.nasa.gov/search.jsp?R=20200002621 2020-05-24T04:40:06+00:00Z THEODORSEN’S AND GARRICK’S COMPUTATIONAL AEROELASTICITY, REVISITED Boyd Perry, III Distinguished Research Associate Aeroelasticity Branch NASA Langley Research Center Hampton, Virginia, USA International Forum on Aeroelasticity and Structural Dynamics Savannah, Georgia June 10-13, 2019 “Results of Theodorsen and Garrick Revisited” by Thomas A. Zeiler Journal of Aircraft Vol. 37, No. 5, Sep-Oct 2000, pp. 918-920 Made known that – • Some plots in the foundational trilogy of NACA reports on aeroelastic flutter by Theodore Theodorsen and I. E. Garrick are in error • Some of these erroneous plots appear in classic texts on aeroelasticity Recommended that – • All of the plots in the foundational trilogy be recomputed and published 2 “Results of Theodorsen and Garrick Revisited” by Thomas A. Zeiler Journal of Aircraft Vol. 37, No. 5, Sep-Oct 2000, pp. 918-920 Made known that – • Some plots in the foundational trilogy of NACA reports on aeroelastic flutter by Theodore Theodorsen and I. E. Garrick are in error • Some of these erroneous plots appear in classic texts on aeroelasticity Recommended that – • All of the plots in the foundational trilogy be recomputed and published Cautioned that – • “One does not set about lightly to correct the masters.” 3 Works Containing Erroneous Plots 1. Theodorsen, T.: General Theory of Aerodynamic Instability and the Mechanism of Flutter. NACA Report No. 496, 1934. 2. Theodorsen, T. and Garrick, I. E.: Mechanism of Flutter, a Theoretical and Experimental Investigation of the Flutter Problem. NACA Report No. 685, 1940. 3. Theodorsen, T. -
Theodorsen's and Garrick's Computational
THEODORSEN’S AND GARRICK’S COMPUTATIONAL AEROELASTICITY, REVISITED Boyd Perry, III Distinguished Research Associate Aeroelasticity Branch NASA Langley Research Center Hampton, Virginia, USA International Forum on Aeroelasticity and Structural Dynamics Savannah, Georgia June 10-13, 2019 “Results of Theodorsen and Garrick Revisited” by Thomas A. Zeiler Journal of Aircraft Vol. 37, No. 5, Sep-Oct 2000, pp. 918-920 Made known that – • Some plots in the foundational trilogy of NACA reports on aeroelastic flutter by Theodore Theodorsen and I. E. Garrick are in error • Some of these erroneous plots appear in classic texts on aeroelasticity Recommended that – • All of the plots in the foundational trilogy be recomputed and published 2 “Results of Theodorsen and Garrick Revisited” by Thomas A. Zeiler Journal of Aircraft Vol. 37, No. 5, Sep-Oct 2000, pp. 918-920 Made known that – • Some plots in the foundational trilogy of NACA reports on aeroelastic flutter by Theodore Theodorsen and I. E. Garrick are in error • Some of these erroneous plots appear in classic texts on aeroelasticity Recommended that – • All of the plots in the foundational trilogy be recomputed and published Cautioned that – • “One does not set about lightly to correct the masters.” 3 Works Containing Erroneous Plots 1. Theodorsen, T.: General Theory of Aerodynamic Instability and the Mechanism of Flutter. NACA Report No. 496, 1934. 2. Theodorsen, T. and Garrick, I. E.: Mechanism of Flutter, a Theoretical and Experimental Investigation of the Flutter Problem. NACA Report No. 685, 1940. 3. Theodorsen, T. and Garrick, I. E.: Flutter Calculations in Three Degrees of Freedom. NACA Report No. 741, 1942. -
30388 OID RS Annual Review
Review of the Year 2005/06 >> President’s foreword In the period covered by this review*, the Royal Society has continued and extended its activities over a wide front. There has, in particular, been an expansion in our international contacts and our engagement with global scientific issues. The joint statements on climate change and science in Africa, published in June 2005 by the science academies of the G8 nations, made a significant impact on the discussion before and at the Gleneagles summit. Following the success of these unprecedented statements, both of which were initiated by the Society, representatives of the science academies met at our premises in September 2005 to discuss how they might provide further independent advice to the governments of the G8. A key outcome of the meeting was an We have devoted increasing effort to nurturing agreement to prepare joint statements on the development of science academies overseas, energy security and infectious diseases ahead particularly in sub-Saharan Africa, and are of the St Petersburg summit in July 2006. building initiatives with academies in African The production of these statements, led by the countries through the Network of African Russian science academy, was a further Science Academies (NASAC). This is indicative illustration of the value of science academies of the long-term commitment we have made to working together to tackle issues of help African nations build their capacity in international importance. science, technology, engineering and medicine, particularly in universities and colleges. In 2004, the Society published, jointly with the Royal Academy of Engineering, a widely Much of the progress we have has made in acclaimed report on the potential health, recent years on the international stage has been environmental and social impacts of achieved through the tireless work of Professor nanotechnologies. -
Aeronautical Science 101: the Development of Engineering Science in Aeronautical Engineering Education at the University of Minnesota
Aeronautical Science 101: The Development of Engineering Science in Aeronautical Engineering Education at the University of Minnesota A THESIS SUBMITTED TO THE FACULTY OF THE GRADUATE SCHOOL OF THE UNIVERSITY OF MINNESOTA BY Amy Elizabeth Foster IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF ARTS October 2000 1. Introduction: Engineering Science and Its Role in Aeronautical Engineering Education In 1929, the University of Minnesota founded its Department of Aeronautical Engineering. John D. Akerman, the department head, developed the curriculum the previous year when aeronautical engineering was still an option for mechanical engineering students. Akerman envisioned the department's graduates finding positions as practical design engineers in industry. Therefore, he designed the curriculum with a practical perspective. However, with the rising complexity of aircraft through the 1930s, 40s, and 50s, engineering science grew more important to aeronautical engineering design practices than ever before. In 1948, the university closed a deal on an idle gunpowder plant. The aeronautical engineering department converted the site into a top- notch aeronautical research laboratory. A new dean for the engineering schools, Athelstan Spilhaus, arrived at the University of Minnesota in 1949. He brought a vision for science-based engineering. Akerman, who never felt completely comfortable with theoretical design methods, struggled with the integration of engineering science into his department's curriculum. Despite Akerman's resistance, engineering science eventually permeated the aeronautical engineering curriculum at Minnesota through this new lab and the dean's vision. In following this path, the University of Minnesota came to exemplify the significant place of engineering science in aeronautical engineering by the 1950s. -
Theodorsen's and Garrick's Computational
International Forum on Aeroelasticity and Structural Dynamics IFASD 2019 9-13 June 2019, Savannah,IFASD Georgia,-2019- USA106 THEODORSEN’S AND GARRICK’S COMPUTATIONAL AEROELASTICITY, REVISITED Boyd Perry, III NASA – Langley Research Center Hampton, Virginia 23681-2199 USA [email protected] Keywords: Flutter; NACA Reports 496, 685, 741; Theodore Theodorsen; I.E. Garrick Abstract: This paper describes a multiyear effort to recompute all of the numerical flutter results contained in Theodore Theodorsen’s and I.E. Garrick’s (“T&G’s”) groundbreaking trilogy of National Advisory Committee for Aeronautics technical reports on aeroelastic flutter (NACA Reports 496, 685, and 741). The paper includes overviews of T&G’s aeroelastic equations and solution methods, comparisons between the original and recomputed numerical results, and instances of errors and tripping points (potentials for confusing the reader) in the original NACA reports. 1 INTRODUCTION In 1934, starting from first principles, Theodore Theodorsen laid out the theory of aeroelastic flutter for a typical section with three degrees of freedom and provided a method for its practical solution [1]. At the time, this solution method offered the only means of solving the flutter problem in an exact closed-form way. To borrow today’s terminology and retroactively apply it to 1934, it can be argued that reference 1 was the original paper on computational aeroelasticity, the only differences between the original and today’s variations being the accuracy and fidelity of their respective structural and unsteady aerodynamic representations. There were follow-on papers in 1938 [2] and 1942 [3] co-authored with I.E. -
Plasma Aerodynamics Since the End of the Cold War Dennis C
Florida State University Libraries Electronic Theses, Treatises and Dissertations The Graduate School 2012 Plasma Aerodynamics since the End of the Cold War Dennis C. Mills Follow this and additional works at the FSU Digital Library. For more information, please contact [email protected] THE FLORIDA STATE UNIVERSITY COLLEGE OF ARTS AND SCIENCES PLASMA AERODYNAMICS SINCE THE END OF THE COLD WAR By DENNIS C. MILLS A Dissertation submitted to the Department of History in partial fulfillment of the requirements for the degree of Doctor of Philosophy Degree Awarded: Summer Semester, 2012 Dennis C. Mills defended this dissertation on April 19, 2012. The members of the supervisory committee were: Jonathan Grant Professor Directing Dissertation Michael Ruse University Representative Frederick Davis Committee Member Edward Wynot Committee Member Rafe Blaufarb Committee Member The Graduate School has verified and approved the above-named committee members, and certifies that the dissertation has been approved in accordance with university requirements. ii To my mother and my wife. iii ACKNOWLEDGEMENTS This journey began back in junior high school around 1970 when I first realized I enjoyed history. Many people helped along the way and I truly wish I could personally thank each and every one of them for the achievement of a life-long dream. They assisted in this long journey and I am forever in their gratitude. iv TABLE OF CONTENTS ABSTRACT .................................................................................................................................. -
Commencement 1920-1940
THE JOHNS HOPKINS UNIVERSITY BALTIMORE Conferring of Degrees At The Close Of The Fifty-Third Academic Year JUNE 11, 1929 IN THE LYRIC THEATRE AT 4 P- M. MARSHALS Professor William 0. Wetforth Chief Marshal Aids Professor G. H. Cabtledge Professor Florence E. Bamberger Dr. E. T. Abercrombie Professor A. M. Chesney Dr. G. H. Evans Professor W. W. Ford Professor J. C. Smallwood Professor S. J. Hart USHERS William Purnell Hall, Jr. Chief Usher George Gump Maxwell Sauerwein George Kay Walter Scheidt Burrell Kilmer Fred Waring Edwin Lockard S. Carson Wasson Robert Lyons MUSIC The program is under the direction of Philip S. Morgan and will be presented by the Johns Hopkins Orchestra, Bail Wirtz, Conductor. The orchestra was founded in 1919 by the Johns Hopkins Musical Association, organized for the promotion of good music in the University and community, the officers of which are Philip S. Morgan, of the Johns Hopkins Alumni Association, President; Frederick H. Gottlieb, Vice-Presi- dent; Professor Frank Morley, Secretary; Ferdinand C. Smith, Executive Secretary; S. Page Nelson, Treasurer. Seventy-three symphony concerts have been given, and the orchestra, which is composed chiefly of amateurs, has played on nineteen occasions for public exercises of the University. — —— ORDER OF EXERCISES i Academic Procession War March from " Athalie " Mendelssohn II Invocation The Reverend Charles E. McAllister Rector of St. Michaels and All Angels Church in Address Dr. Frederick George Donnan Professor of General Chemistry, University College, London IV -
Scientific American, July, 1956
SCIENTIFIC ERIC ANTIOCHUS I, KING OF KOMMAGENE F/FTYCENTS �/956 © 1956 SCIENTIFIC AMERICAN, INC A pound of fuel to light Chicago THAT'S ALL THE URANIUM needed to produce atomic production processes, to test product quality, and for power equal to the energy in 3 million pounds of coal. research. It could light Chicago for a full day! THE CHALLENGING FIELD of atomic energy is not ATOMIC RESEARCH is focused on developing an eco new to the people of Union Carbide. They have been nomical way to produce electricity from atomic energy. pioneering in every phase of this exciting business Scientists at Oak Ridge National Laboratory, which from the mining of uranium ore to harnessing the atom Union Carbide Nuclear Company operates for the for ·our future comfort and well-being. Atomic Energy Commission, have already built experi F R E E: To learn more about the atom and the tremendous mental power producing reactors that are serving as a strides made in the peaceJul applications oj atomic energy, guide to commercial atom power plants. write Jor the illustrated booklet "The Atom In Our Hands." PEACEFUL USES for the atom have also been found in the diagnosis and treatment of disease. Radioactivity is UNION CARBIDE uncovering important facts about plant and animal AND CARBON CORPORATION growth. Industry uses the atom's radiation to control 30 EAST 42ND STREET 00 NEW YORK 17. N. Y. In Canada: UNION CARBIDE CANADA LIMITED, Toronto VCC's Trade-marked Products include ELECTROMET Alloys and Metals CRAG Agricultural Chemicals NATIONAL Carbons ACHESON