Volume 38 Issue 12
Dec.  2023
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ZHANG Shuai, GUO Jian, DAI Wuye. Investigation on drag and heat flux reduction induced by a novel combinational spike and channel concept for high speed vehicles[J]. Journal of Aerospace Power, 2023, 38(12):3063-3072 doi: 10.13224/j.cnki.jasp.20220199
Citation: ZHANG Shuai, GUO Jian, DAI Wuye. Investigation on drag and heat flux reduction induced by a novel combinational spike and channel concept for high speed vehicles[J]. Journal of Aerospace Power, 2023, 38(12):3063-3072 doi: 10.13224/j.cnki.jasp.20220199

Investigation on drag and heat flux reduction induced by a novel combinational spike and channel concept for high speed vehicles

doi: 10.13224/j.cnki.jasp.20220199
  • Received Date: 2022-04-10
    Available Online: 2023-10-02
  • For the drag and heat flux reduction of high speed vehicles, a novel combinational spike and channel concept was proposed. The high pressure air behind the bow shock flowed into the channel at the head of the spike, and then sprayed out through the lateral jet near the middle of the spike. Based on the SST k-ω turbulence model, the two-dimensional axisymmetric Reynolds average Navier-Stokes equations were solved by the finite volume method, and the flow field of the combinational configuration was numerically simulated. Compared with the single spike, with the introduction of the channel, the lateral jet pushed the separated shock wave away from the spike, and the intensity of the reattachment shock wave was significantly weakened, thus improving the drag and heat flux reduction efficiency. The influencing factors of the combined configuration were analyzed; the larger convergent half angle of the channel indicated the closer location of the lateral jet to the middle of the spike, and the better overall drag and heat flux reduction result of this configuration. With the increase of dynamic pressure, the drag and heat flux reduction performance of the configuration was continually improved. In the research range, the combined configuration in which the convergent half angle was 60° and the lateral jet was located at the middle of the spike had the best overall result of drag and heat flux reduction, and the result reached the best when the dynamic pressure was 30.15 kPa. Compared with the spike, the peak value of heat flux along the blunt body wall was reduced by 33.84% and the total drag of the configuration was reduced by 14.44%.

     

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