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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (9): 125941.doi: 10.7527/S1000-6893.2021.25941

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Numerical study of hot jet interaction effect in divert control system

FU Yang'aoxiao1, DING Mingsong1,2, LIU Qingzong1,2, JIANG Tao1, SHI Run1, DONG Weizhong1, GAO Tiesuo1   

  1. 1. Computational Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China;
    2. State Key laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang 621000, China
  • Received:2021-06-09 Revised:2021-06-28 Online:2022-09-15 Published:2021-09-06
  • Supported by:
    Key Basic Research Project of Foundation Strengthen Plan (2019-JCJQ-ZD-047)

Abstract: Hot jet interaction effect and its influence on aerodynamic characteristics and aero-thermal environment of aircraft is an important issue remaining to be solved in research on jet interaction. By solving three-dimensional chemical non-equilibrium Navier-Stokes equations, this paper analyzes the influence of afterburning effect and heterogeneous gas injection effect in the high-speed aircraft divert control system on aerodynamic characteristics and aero-thermal environment of the aircraft. The hot jet interaction effect on the aircraft with different flight velocity, flight alttude and angle of attack is also analyzed. The result shows that hot jet interaction effect has pronounced influence on the aerodynamic characteristics and aero-thermal environment of aircraft, mainly including afterburning effect and heterogeneous gas injection effect. In this paper's given conditions, hot jet interaction effect is dominated by afterburning effect, which can increase the thrust produced by jet interaction, produce an additional pitching up moment, and increase the heat flux in jet interference area. The higher the flight velocity, and the lower the flight altitude. The nozzle outlet on the windward side will enhance afterburning effect. Heterogeneous gas injection effect is enhanced when flight velocity is high and nozzle outlet is on windward side, but it is still insignificant compared with afterburning effect.

Key words: divert control system, jet interaction, afterburning effect, non-equilibrium effect, aerodynamic characteristic, aero-thermal environment

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