At the National Science and Technology Awards Conference, the “Supersonic Flow Field NPLS Test System and Application†project of the Institute of Air Defense Academy Tian Lifeng was awarded the second prize of the 2016 National Technology Invention Award.
For a long time, the supersonic flow field is “invisible and intangibleâ€, its airflow speed can reach up to kilometers per second, the temperature range spans thousands of degrees Celsius, and the turbulent pulsation frequency is up to 1 MHz. To accurately obtain the velocity field, density field, turbulent pulsation and aero-optical wavefront distribution of flow under such extreme mechanical conditions, traditional experimental measurement techniques are powerless and have been regarded as plaguing the development of related aerospace weapons, aerospace and missile equipment. The bottleneck problem.
Aiming at the broad prospects of the application of supersonic flow field measurement technology, since the project was established in 2003, under the leadership of the aerodynamics expert Professor Yi Shihe, under the focus of the research team members, a nano-trace plane laser was proposed. The new principle and new method of scattering technology, invented the integration and operation technology of NPLS test system, supersonic flow field nano-trace technology, nano-trace ultrasonic supersonic flow tomography technology, the first "supersonic flow field NPLS test system", realized Visualization of the flow field of the aircraft and high-resolution experimental measurements of parameters such as flow field velocity field, density field, turbulent pulsation and aero-optical wavefront, to achieve the research goal of "clear visible and fine measurement" of the supersonic flow field. In one fell swoop, it solved the key technical problems related to aerodynamic design and precision guidance in the long-term troubled development of major domestic models, and significantly improved the independent innovation and research and development capabilities of China Aerospace Aircraft.
At present, the main research results of this project have been widely used in the development of air and space weapon equipment of China Aerospace Vehicle Development Unit, Aircraft Aerodynamics Research Unit and universities, and have been awarded in the major basic research of supersonic turbulence, which is highly concerned in the aerospace field. A number of important achievements.
So far, the “Supersonic Flow Field NPLS Test System and Application†project has applied for 30 patents, 16 have been authorized, 2 software projects have been published, 1 related monographs have been published, and more than 150 academic papers have been published, including SCI Search 70. Article.
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