Theodore von Kármán

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Theodore von Kármán
Theodore von Karman crop.jpg
Von Kármán at the Caltech Jet Propulsion Laboratory in 1950
Born (1881-05-11)May 11, 1881
Budapest, Austria-Hungary
Died May 6, 1963(1963-05-06) (aged 81)
Aachen, West Germany
Residence Hungary
Germany
United States
Nationality Hungarian
Citizenship Hungary
United States
Alma mater Budapest University of Technology and Economics
Known for Kármán vortex street
von Kármán constant
von Kármán swirling flow
von Kármán momentum integral
Kármán line
Kármán–Howarth equation
Supersonic and hypersonic airflow characterization;
Awards ASME Medal (1941)
John Fritz Medal (1948)
Wright Brothers Memorial Trophy (1954)
Daniel Guggenheim Medal (1955)
Timoshenko Medal (1958)
National Medal of Science (1962)
Wilhelm Exner Medal (1962)
Foreign Member of the Royal Society[1]
Scientific career
Fields Aerospace Engineering
Institutions University of Göttingen,
RWTH Aachen,
California Institute of Technology,
von Karman Institute for Fluid Dynamics
Thesis Investigations on buckling strength (1908)
Doctoral advisor Ludwig Prandtl[2]
Doctoral students Maurice Anthony Biot
Sol Penner
Frank Malina
Tsien Hsue-sen
Chia-Chiao Lin
Hu Ning
Ernest Sechler[2]

Theodore von Kármán (Hungarian: (szőlőskislaki) Kármán Tódor [(sølløːʃkiʃlɒki) ˈkaːrmaːn ˈtoːdor]; 11 May 1881 – 6 May 1963) was a Hungarian-American mathematician, aerospace engineer, and physicist who was active primarily in the fields of aeronautics and astronautics. He is responsible for many key advances in aerodynamics, notably his work on supersonic and hypersonic airflow characterization. He is regarded as the outstanding aerodynamic theoretician of the twentieth century.[3][4][5][6] According to György Marx he was one of The Martians.[7]

Early life[edit]

Kármán was born into a Jewish family in Budapest, Austria-Hungary as Kármán Tódor. One of his ancestors was Rabbi Judah Loew ben Bezalel.[1] He studied engineering at the city's Royal Joseph Technical University, known today as Budapest University of Technology and Economics. After graduating in 1902 he moved to the German Empire and joined Ludwig Prandtl at the University of Göttingen, where he received his doctorate in 1908. He taught at Göttingen for four years. In 1912 he accepted a position as director of the Aeronautical Institute at RWTH Aachen University, one of the leading German universities. His time at RWTH Aachen was interrupted by service in the Austro-Hungarian Army from 1915 to 1918, during which time he designed the Petróczy-Kármán-Žurovec, an early helicopter.

After the war he returned to Aachen with his mother and sister Josephine de Karman. Some of his students took an interest in gliding and saw the competitions of the Rhön-Rossitten Gesellschaft as an opportunity to advance in aeronautics. Kármán engaged Wolfgang Klemperer to design a competitive glider.[8]

Josephine encouraged Theodore to expand his science beyond national boundaries. They organized the first international conference in mechanics held in September 1922 in Innsbruck. Subsequent conferences were organized as the International Union of Theoretical and Applied Mechanics.[9] Kármán left his post at RWTH Aachen in 1930.

Emigration and JPL[edit]

Von Kármán (center) during his work at the Jet Propulsion Laboratory in 1940

Apprehensive about developments in Europe, in 1930 Kármán accepted the directorship of the Guggenheim Aeronautical Laboratory at the California Institute of Technology (GALCIT). The directorship included provision for a research assistant, and he selected Frank Wattendorf, an American who had been studying for three years in Aachen.

Another student E. E. Sechler took up the problem of making reliable airframes for aircraft, and with Kármán's support, developed an understanding of aeroelasticity.

In 1936, Kármán engaged the legal services of Andrew G. Haley to form the Aerojet Corporation, with his graduate student Frank Malina and their experimental rocketry collaborator Jack Parsons, to manufacture JATO rocket motors. He later became a naturalized citizen of the United States.

German activity during World War II increased U.S. military interest in rocket research. During the early part of 1943, the Experimental Engineering Division of the United States Army Air Forces Material Command forwarded to Kármán reports from British intelligence sources describing German rockets capable of travelling more than 100 miles (160 km). In a letter dated 2 August 1943 Kármán provided the Army with his analysis of and comments on the German program.[10]

In 1944 he and others affiliated with GALCIT founded the Jet Propulsion Laboratory (JPL), which is now a Federally funded research and development center managed and operated by Caltech under a contract from NASA. In 1946 he became the first chairman of the Scientific Advisory Group which studied aeronautical technologies for the United States Army Air Forces. He also helped found AGARD, the NATO aerodynamics research oversight group (1951), the International Council of the Aeronautical Sciences[permanent dead link] (1956), the International Academy of Astronautics (1960), and the Von Karman Institute for Fluid Dynamics in Brussels (1956).

He eventually became an important figure in supersonic motion, noting in a seminal paper that aeronautical engineers were "pounding hard on the closed door leading into the field of supersonic motion."[11]

Last years[edit]

The Kármán-Auditorium at the RWTH Aachen University in Germany

In June 1944, Kármán underwent surgery for intestinal cancer in New York City. The surgery caused two hernias, and Kármán's recovery was slow. Early in September, while still in New York, he met U.S. Army Air Forces Commanding General Henry H. Arnold on a runway at LaGuardia Airport, and Arnold then proposed that Kármán should move to Washington, D.C. to lead the Scientific Advisory Group and become a long-range planning consultant to the military. Kármán returned to Pasadena around mid-September, was appointed to the SAG position on October 23, 1944, and left Caltech in December 1944.[12]

At the age of 81 Kármán was the recipient of the first National Medal of Science, bestowed in a White House ceremony by President John F. Kennedy. He was recognized, "For his leadership in the science and engineering basic to aeronautics; for his effective teaching and related contributions in many fields of mechanics, for his distinguished counsel to the Armed Services, and for his promoting international cooperation in science and engineering."[13]

Kármán never married. He died on a trip to Aachen, Germany, in 1963, and his body was returned to the United States, to be entombed in the Beth Olam Mausoleum at what is now the Hollywood Forever Cemetery.[14]

Kármán's fame was in the use of mathematical tools to study fluid flow,[15] and the interpretation of those results to guide practical designs. He was instrumental in recognizing the importance of the swept-back wings that are ubiquitous in modern jet aircraft.

Selected contributions[edit]

Specific contributions include theories of non-elastic buckling, unsteady wakes in circum-cylinder flow, stability of laminar flow, turbulence, airfoils in steady and unsteady flow, boundary layers, and supersonic aerodynamics. He made additional contributions in other fields, including elasticity, vibration, heat transfer, and crystallography. His name also appears in a number of concepts, for example:

Selected writings[edit]

Main article: Theodore von Kármán bibliography

Books[edit]

  • Kármán, T. von; Burgers, J. M. (1924). General Aerodynamic Theory. 2 vols., Julius Springer. 
  • Kármán, Theodore von; Biot, M. A. (1940). Mathematical Methods in Engineering; An introduction to the Mathematical Treatment of Engineering Problems. McGraw-Hill. p. 505. ASIN B0006AOTLK. 
  • Kármán, T. von; Biot, M. A. (2004). Aerodynamics: Selected Topics in the Light of Their Historical Development. Dover Books on Aeronautical Engineering. Dover Publications. p. 224. ISBN 0486434850. 
  • Kármán, T. von (1956). Collected Works of Dr. T. von Kármán (1902–1951). 4 vols., Butterworth Scientific Publications. 
  • Kármán, T. von (1961). From Low-Speed Aerodynamics to Astronautics. Pergamon Press. ASIN B000H4OVPO. 
  • Kármán, T. von; Edson, L. (1967). The Wind and Beyond—T. von Kármán Pioneer in Aviation and Pathfinder in Space. Little Brown. p. 376. ISBN 0316907537. 

Autobiography[edit]

Four years after Kármán died his autobiography The Wind and Beyond was published by Lee Edson with Little, Brown and Company. Seven major academic journals then followed with book reviews by noted authors: As the book was non-technical, written for the general reader, Thomas P. Hughes[16] cited that as problematic given the technical context of Kármán's work. Hughes conceded that Kármán "exhibited a genius for finding the simplifying assumptions that made possible the mathematical analysis." While acknowledging Kármán's gifts as an applied mathematician and teacher, Stanley Corrsin also points out that the autobiography is "marriage between a man and his ego." In the later part of his life, Kármán was a "planner of global symposia and societies" and a "consultant to the upper echelons of the Pentagon corps."[17]

On creativity, Kármán wrote "the finest creative thought comes not out of organized teams but out of the quiet of one's own world."[8]:307 In his review[18] I. B. Holley noted "penetrating insights into the creative process, its ingredients, nurture and exploitation." According to Holley, Kármán was given to "convivial drinking and the company of beautiful women."

An enthusiastic review by J. Kestin[19] advised readers to buy and study the book, and prize it as a reference. On the other hand, Charles Süsskind[20] faults Kármán for his contempt for the conventional (gaminarie). Süsskind expected the book to show some reaction to Wernher von Braun’s coming to America, and some clarification of the Hsue-shen Tsien affair, rather than "lapses into generalities". Süsskind also tags Kármán as a militarist: a "forthright engineer who is quite unabashed about his lifelong association with military authorities in whatever country he happened to reside at the time."

Sydney Goldstein, who also wrote the Royal Society memoir for Kármán, reviewed the autobiography[21] and remembered "an eminent engineer and scientist, warm-hearted and witty, much traveled, well-known by many, devoted to international collaboration, who, in his own words, as a scientist found the military 'the most comfortable group to deal with'".

Honors and legacy[edit]

President Kennedy honors Theodore von Kármán.

Further reading[edit]

  • I. Chang, Thread of the Silkworm. Perseus Books Group (1995). ISBN 0-465-08716-7.
  • D. S. Halacy, Jr., Father of Supersonic Flight: Theodor von Kármán (1965).
  • M. H. Gorn, The Universal Man: Theodore von Kármán's Life in Aeronautics (Smithsonian Institution Press, Washington, 1992).
  • G. Gabrielli, "Theodore von Kármán", Atti Accad. Sci. Torino Cl. Sci. Fis. Mat. Natur. 98 (1963/1964), 471–485.
  • J. L. Greenberg and J. R. Goodstein, "Theodore von Kármán and applied mathematics in America," A century of mathematics in America II (Providence, R.I., 1989), 467–477.
  • R. C. Hall, "Shaping the course of aeronautics, rocketry, and astronautics: Theodore von Kármán, 1881–1963," J. Astronaut. Sci. 26 (4) (1978), 369–386.
  • J. Polásek, "Theodore von Kármán and applied mathematics" (Czech), Pokroky Mat. Fyz. Astronom. 28 (6) (1983), 301–310.
  • Wattendorf, F. L. (1956). "Theodore von Kármán, international scientist". Z. Flugwiss. 4: 163–165. 
  • Wattendorf, F. L.; Malina, F. J. (1964). "Theodore von Kármán, 1881–1963". Astronautica Acta. 10: 81. 

References[edit]

  1. ^ a b Goldstein, S. (1966). "Theodore von Karman 1881–1963". Biographical Memoirs of Fellows of the Royal Society. 12: 334–365. doi:10.1098/rsbm.1966.0016. 
  2. ^ a b Theodore von Kármán at the Mathematics Genealogy Project
  3. ^ Chang, Iris, Thread of the silkworm, Basic Books, 1996, pages 47–60
  4. ^ Greenberg, J. L.; Goodstein, J. R. (1983). "Theodore von Karman and Applied Mathematics in America". Science. 222 (4630): 1300–1304. Bibcode:1983Sci...222.1300G. doi:10.1126/science.222.4630.1300. PMID 17773321. 
  5. ^ O'Connor, John J.; Robertson, Edmund F., "Theodore von Kármán", MacTutor History of Mathematics archive, University of St Andrews .
  6. ^ Sears, W. R. (1965). "Some Recollections of Theodore von Kármán". Journal of the Society for Industrial and Applied Mathematics. 13: 175. doi:10.1137/0113011. 
  7. ^ A marslakók legendája - György Marx
  8. ^ a b Theodore von Kármán with Lee Edson (1967) The Wind and Beyond, page 98
  9. ^ Alkemade, Dr. Ir. Fons (2010). "IUTAM | History". Amsterdam, The Netherlands: International Union of Theoretical and Applied Mechanics. Archived from the original on 17 July 2011. Retrieved 29 December 2010. 
  10. ^ "Development of the Corporal: the embryo of the army missile program, vol. 1" (PDF). Army Ballistic Missile Agency. p. 26. Archived from the original (PDF) on 2009-03-26. 
  11. ^ Hallion, Richard P. "The NACA, NASA, and the Supersonic-Hypersonic Frontier". NASA. NASA Technical Reports Server. Retrieved 7 September 2011. 
  12. ^ Bluth, John (July 15, 1994). "Von Karman, Malina laid the groundwork for the future JPL". Jet Propulsion Laboratory UNIVERSE. JPL. 24 (14). 
  13. ^ "The President's National Medal of Science: Recipient Details". NSF. 
  14. ^ Theodore von Karman at Find a Grave
  15. ^ Sears, W. R. (1986). "Von Kármán: Fluid Dynamics and Other Things". Physics Today. 39: 34. Bibcode:1986PhT....39a..34S. doi:10.1063/1.881063. 
  16. ^ Thomas P. Hughes (1968) The American Historical Review
  17. ^ Stanley Corrsin (1968) Isis 59(2)
  18. ^ I. B. Holley (1968) Science v 159 #3814
  19. ^ J. Kestin (1969) Journal of Applied Mechanics 36(1)
  20. ^ Charles Süsskind (1968) Technology and Culture
  21. ^ Sydney Goldstein (1968) Journal of Fluid Mechanics 33(2) doi:10.1017/S0022112068221390
  22. ^ "Theodore von Karman Medal". ASCE. Archived from the original on 2007-09-30. 
  23. ^ Sprekelmeyer, Linda, editor. These We Honor: The International Aerospace Hall of Fame. Donning Co. Publishers, 2006. ISBN 978-1-57864-397-4.
  24. ^ "AEDC Fellows". Arnold Air Force Base. 
  25. ^ Bilger, Burkhard (April 22, 2013) "The Martian Chroniclers", The New Yorker. Retrieved 2013-04-23.
  26. ^ "1992 29¢ Theodore von Karman Stamps Scott #2699". Exploring Space Stamps. 
  27. ^ Kennedy, John F. (February 18, 1963) "Remarks Upon Presenting the National Medal of Science to Theodore von Karman". The American Presidency Project.
  28. ^ Josiah Willard Gibbs Lectures. American Mathematical Society
  29. ^ Kármán, Theodore von (1940). "The engineer grapples with nonlinear problems". Bull. Amer. Math. Soc. 46 (8): 615–683. doi:10.1090/s0002-9904-1940-07266-0. MR 0003131. 
  30. ^ http://galcit.caltech.edu/ahs/index.html
  31. ^ Fontos események li-2.hu

External links[edit]

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