Volume 39 Issue 12
Dec.  2024
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ZHAO Chengeng, SUN Zhongyi, SU Yifei, et al. Investigation the control of the basic thermal environment of multistage launch vehicle at high altitude flight[J]. Journal of Aerospace Power, 2024, 39(12):20220439 doi: 10.13224/j.cnki.jasp.20220439
Citation: ZHAO Chengeng, SUN Zhongyi, SU Yifei, et al. Investigation the control of the basic thermal environment of multistage launch vehicle at high altitude flight[J]. Journal of Aerospace Power, 2024, 39(12):20220439 doi: 10.13224/j.cnki.jasp.20220439

Investigation the control of the basic thermal environment of multistage launch vehicle at high altitude flight

doi: 10.13224/j.cnki.jasp.20220439
  • Received Date: 2022-06-19
    Available Online: 2024-08-02
  • The basic thermal environment of one-engine and four-engine multi-stage liquid launch vehicles has been systematically investigated and the feasibility of the nitrogen injection thermal protection method at the rocket base has been verified by numerical simulation. Based on multi-component Navier-Stokes equation, k-ε equation turbulence model and thermal radiation equation, the control equations were discretized using AUSM format to establish a plume model for high altitude supersonic flight launch vehicles. The plume flow field and heating rate of the launch vehicle at different altitudes were calculated using the blocked gird construction method, and the numerical results were compared with flight experiments to verify the feasibility of the calculation method. Study showed that at low altitudes, convection heating rate is dominant, with a peak at 30 km; at high altitudes, radiation heating rate is dominant, with a peak at 110 km; at the same time, the nitrogen injection device can effectively suppress gas backflow and reduce convection heating rate at the rocket base, but the selection of the right number of spouts and total injection pressure is extremely important.

     

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