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Design and Regulation of Two-dimensional Variable Geometry Hypersonic Inlets

JIN Zhiguang, ZHANG Kunyuan, CHEN Weiming, LIU Yuan   

  1. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2012-05-29 Revised:2012-09-20 Online:2013-04-25 Published:2013-04-23
  • Supported by:

    National Natural Science Foundation of China (11102086)

Abstract:

A variable geometry inlet with a rotating cowl operating in a large Mach number range with large angles of attack is studied through numerical simulation, which yields a design method of the baseline variable geometry inlet with high performance and a law of performance variation and regulation under different conditions. The result shows that: the variable geometry inlet with curved cowl has better performance and flow field structure in the large Mach number range. The variable geometry inlet designed at Mach number Ma=6.0 with a rotating cowl can realize self-start at Ma=4.0 without the boundary layer diverter, and the lowest Mach number of self-start is Ma=3.5. The cowl can maintain the normal working of the inlet by rotating properly to control the average Mach number of the throat at low incoming Mach numbers with large angles of attack.

Key words: hypersonic inlet, variable geometry inlet, rotating cowl, curved cowl, numerical simulation

CLC Number: