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Research on the inlet flow field and ground vortex under crosswind condition[J]. Journal of Aerospace Power, 2019, 34(1): 228-237. doi: 10.13224/j.cnki.jasp.2019.01.026
Citation: Research on the inlet flow field and ground vortex under crosswind condition[J]. Journal of Aerospace Power, 2019, 34(1): 228-237. doi: 10.13224/j.cnki.jasp.2019.01.026
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Research on the inlet flow field and ground vortex under crosswind condition

doi: 10.13224/j.cnki.jasp.2019.01.026
  • Received Date: 2018-01-09
  • Publish Date: 2019-01-28
    Abstract
  • The aerodynamic performance of a scaled model of high bypass ratio engine inlet under the ground crosswind condition was studied by combining the numerical simulation and experiments, considering the influence of crosswind and ground suction vortex on the inlet flow field and the effect of crosswind on the ground vortex strength; then the double function of the crosswind on the inlet flow field was explained and analyzed. The results indicated that: according to the generation feature of ground vortex and the influence level of crosswind and ground vortex acted on inlet flow field separately, the process from steady state of ground vortex to being blown off can be divided into three stages, i.e.: the initial stage, the rapid stage and the end stage. With the increase of engine inhalation velocity，the initial blow-off speed and the complete blow-off speed increased, but the corresponding velocity ratio basically kept unchanged; before the ground vortex was blown away completely, the crosswind maked double influence on the inlet flow field by affecting the suction vortex, in the initial stage and the end stage, the influence of crosswind played a leading role in the inlet flow field, similar to no-ground condition, the inlet distortion increased with crosswind in this two stages, in the rapid stage, the influence of ground suction vortex played a leading role in the inlet flow field, the inlet distortion decreased with crosswind.

     

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