After graduating from college, Von Carmen served in the army for one year, and then became an assistant to Professor Peng Ji. During this period, he refined the famous problem "Euler pressure bar" at that time. At the age of 25, he won a scholarship from the Hungarian Academy of Sciences, and went to G? ttingen, the holy place of science in the world, where he studied under ludwig prandtl of the University of G? ttingen. Under the guidance of Prandtl, von Carmen made a series of studies on the bending phenomenon of inelastic bars. 1908 received his doctorate. Then I went to Paris for an inspection. Soon, Pelant wrote to ask him to be an assistant at the University of G? ttingen. He accepted the invitation with pleasure and began his career as an aviation scientist.
At that time, Pelant was engaged in the study of fluid boundary layer separation. After von Carmen went to the University of G? ttingen, he attached great importance to this phenomenon. It is proved that the two rows of intersecting vortices formed by the fluid behind the cylinder are stable. He wrote two excellent papers on this. Because some people call this phenomenon "Carmen Vortex Street". This discovery became an important discovery of fluid mechanics.
After four years in G? ttingen, von Carmen returned to Hungary and became a professor at a mining institute. Soon, he came to Aachen Institute of Technology. After World War I, he worked in the Hungarian Soviet Union and the Ministry of Education for a while, and then became a professor at Aachen Institute of Technology for 10 years. 1912-1929, former dean of Aachen Aviation College.
Von Carmen's popularity soared. From 1922 to 1926, he presided over three international conferences on applied mechanics. During this period, through his efforts, the problem of "turbulence", which is still called the biggest problem of fluid mechanics, made the first significant progress. At the meeting of 1922, von Carmen first put forward the concept of "turbulence" and preliminarily expounded its theoretical basis. At the meeting of 1924, prandtl shifted the viewpoint of gas molecular motion theory to this issue, and von Carmen made a deep discussion on prandtl's research from a more general point of view and put forward new theoretical concepts. At the conference of 1926, von Carmen gave a report entitled "Mechanical Similarity in Turbulence", which was very successful.
1926, California Institute of Technology decided to expand the original aviation team into an aviation graduate school and build a laboratory (GALCIT for short). 1929, von Carmen of Jewish descent went to the United States and became a director of GALCIT. Two years later, the American Aviation Academy was founded.
From 1930 to 1942, von Kamen has made great contributions to fluid mechanics, theory of turbulence, supersonic flight, engineering mathematics, aircraft structure and soil wind erosion. His publications on fluid mechanics dominated almost the whole field of fluid mechanics, so GALCIT became the research center of international fluid mechanics. He trained students for GALCIT on five continents.
1936, when the scientific community generally expressed doubts about rocket propulsion technology, von Carmen supported his students to study this subject. 1940, he and Malina developed a prototype of the aircraft take-off booster rocket. This rocket is also the prototype of the solid rocket on American Polaris, militia and Poseidon long-range missile.
1936, von Carmen became an American citizen. 194 1 cooperated with Qian Xuesen, a mechanic in China, to solve the problem of large deflection instability of cylindrical thin shell structure under axial pressure. By 1944, he has made many significant achievements in rocket technology fields such as solid and liquid take-off booster rockets, rocket engine aircraft, and naturally ignited liquid propellants.
1June, 944, von Carmen received a phone call from General Arnold, asking him to go to the airport to discuss. The content of the meeting is to formulate the development plan of the US Air Force in the next 20 to 50 years. Von Carmen accepted it and soon organized a scientific advisory group composed of 36 experts.
On the eve of the end of World War II, General Arnold awarded von Carmen the rank of "Major General" and asked him to lead a group of experts to Germany to accept their jobs. Von Carmen and others came to the Secret Research Institute of the German Air Force hidden in a pine forest near Brunswick, interrogated nearly a thousand researchers, checked the research equipment, and analyzed more than 3 million research reports weighing 1500 tons. Then, 400 technicians who fled to Munich from the V-2 rocket base in Penemende, Germany, were interrogated.
194565438+In February, von Carmen submitted a report entitled "Towards a New Level" to the American authorities. The report is known as the "blueprint of the US Air Force" and has had a very far-reaching impact on the construction of the US Air Force. Von Carmen became the chief think tank of the US Air Force.
1in April, 949, NATO was established. Von Carmen wanted to use NATO to establish an experimental factory for international cooperation, and this idea was adopted by the highest authorities. Then, he set up an advisory group to develop international aviation research, and set up an aerodynamic training center in Belgium, which was later renamed "von Carmen Center". In 1950s, Von Carmen presided over two international aviation conferences held in Paris and Copenhagen, and founded the International Astronautical Federation.
Von Carmen is also helpful to China's aviation industry. 1929, he came to China and suggested setting up aviation courses in Tsinghua University. 193 1 year, he sent his adopted son Waldendorf to China to serve as a scientific consultant of Tsinghua University Aviation Department. 1In June, 938, he came to China again and watched the large wind tunnel that was about to be completed in Nanchang. During his stay at California Institute of Technology, Von Carmen trained a group of outstanding China scientists, including Qian Xuesen, Guo Yonghuai and Qian Weichang.
1963 February 18, the United States awarded von Carmen the first "National Science Medal". Two months later, von Carmen died at the age of 82.
Von Carmen is a modern aviation master and the chief think tank of the US Air Force. The combination of his wisdom and general Arnold's courage played a very important role in the construction of the US Air Force.