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Volume 50 Issue 7
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Journal of Beijing University of Aeronautics and Astronautics  > 2024  >  50(7): 2113-2122.
CHEN B，LUO L，JIANG A L，et al. Numerical simulation of separation characteristics for internally buried weapon at high Mach number[J]. Journal of Beijing University of Aeronautics and Astronautics，2024，50（7）：2113-2122 （in Chinese） doi: 10.13700/j.bh.1001-5965.2022.0627
Citation: CHEN B，LUO L，JIANG A L，et al. Numerical simulation of separation characteristics for internally buried weapon at high Mach number[J]. Journal of Beijing University of Aeronautics and Astronautics，2024，50（7）：2113-2122 （in Chinese） doi: 10.13700/j.bh.1001-5965.2022.0627
shu

Numerical simulation of separation characteristics for internally buried weapon at high Mach number

doi: 10.13700/j.bh.1001-5965.2022.0627

  • Computational Aerodynamic Institute of China Aerodynamic Research & Development Center，Mianyang 621000，China

Funds:  National Numerical Windtunnel (NNW) Project
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  • Corresponding author: E-mail：zph2s@sina.com
  • Received Date: 22 Jul 2022
  • Accepted Date: 26 Aug 2022
    • Available Online: 28 Jul 2023
  • Publish Date: 18 Jul 2023
    Abstract

  • The internal weapon may exhibit distinct separation characteristics due to the greater shear layer and shock wave of the high Mach number (Ma > 2) weapon bay, as well as distinct flow characteristics compared to the subsonic, transonic, and supersonic weapon bays. In this paper, using the unstructured hybrid mesh flow solver NNW-Flow Star, and based on the improved HLLE++ format and adaptive hybrid mesh technology established in the previous simulation for high Mach number cavity flow, the numerical simulations are used to compare and analyze the separation characteristics of the internal weapon at Ma=4 and Ma=2. The effects of different leading edge flow control measures such as annular plates, transverse columns, serrations and cylindrical arrays on the separation characteristics of high Mach number (Ma=4) weapons are investigated to provide guidance for the design of safe separation schemes for internal weapons at high Mach number. The findings show that at a high Mach number (Ma=4), the weapon bay’s distinct flow characteristics and the shock wave’s different shock angle at the leading edge of the weapon bay cause the internal weapon and weapon bay to have different channel effects at first and different shock interference during the separation process. As a result, the internal weapon’s attitude angle and pitch moment at a high Mach number (Ma=4) differ from those at Ma=2. After the leading edge flow control measures are adopted, the rising trend of the positive pitching moment for internal weapons is weakened and the yaw angle is reduced, which is conducive to the safe separation of missiles.

     

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