Volume 39 Issue 9
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ZHAO Chengeng, LE Guigao, SU Yifei, et al. Investigations on thermal environment of launch pads during the two-nozzle launch vehicle launching[J]. Journal of Aerospace Power, 2024, 39（9）：20220717 doi: 10.13224/j.cnki.jasp.20220717
Citation: ZHAO Chengeng, LE Guigao, SU Yifei, et al. Investigations on thermal environment of launch pads during the two-nozzle launch vehicle launching[J]. Journal of Aerospace Power, 2024, 39（9）：20220717 doi: 10.13224/j.cnki.jasp.20220717
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Investigations on thermal environment of launch pads during the two-nozzle launch vehicle launching

doi: 10.13224/j.cnki.jasp.20220717

  • School of Mechanical Engineering，Nanjing University of Science and Technology，Nanjing 210094, China

  • Received Date: 2022-09-22
    Available Online: 2024-01-22
    Abstract

  • Taking the launch pads consisting of two-nozzle launch vehicle power system as the research object, the thermal environment of launch pads during the rocket launching was studied by numerical simulation method. Based on three-dimensional compressible Navier-Stokes equations, k-ε turbulence model and second order TVD (total variation diminishing) upwind scheme were used to establish the gas jet model of two-nozzle launch vehicle. The research showed that the intersections of the nozzle central axis and the flame deflectors withstood the greatest impact of the guide surface, where the temperature and pressure were extremely high. The back splash caused by the rocket tail jet impinging on the flame deflectors may further deteriorate the thermal environment of the launch pad. The drift of the rocket during launching could increase the impact of the jet on the launch pad, rapidly increase its surface temperature and pressure, and reduce its service life. The research method provides an effective method for the thermal environment assessment of launch pads during launch vehicle takeoff and has important engineering application value for the safety design of thermal protection system.

     

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