Volume 35 Issue 10
Oct.  2020
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FAN Weijie, ZHOU Jin, LI Shibin. Drag reduction performance of hemispherical body with porous opposing jets[J]. Journal of Aerospace Power, 2020, 35(10): 2176-2185. doi: 10.13224/j.cnki.jasp.2020.10.018
Citation: FAN Weijie, ZHOU Jin, LI Shibin. Drag reduction performance of hemispherical body with porous opposing jets[J]. Journal of Aerospace Power, 2020, 35(10): 2176-2185. doi: 10.13224/j.cnki.jasp.2020.10.018
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Drag reduction performance of hemispherical body with porous opposing jets

doi: 10.13224/j.cnki.jasp.2020.10.018
  • 1.

    College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China

  • 2.

    National Innovation Institute of Defense Technology,Academy of ,Military Sciences of the People’s Liberation Army of China,Beijing 100071,China

  • Received Date: 2020-01-12
  • Publish Date: 2020-10-28
    Abstract
  • Drag reduction performance of a hemispherical body with equal area porous opposing jets was numerically studied using the two-equation shear stress transfer (SST) k -ω turbulence model. Based on the presupposition of equal total jet area, the porous opposing jets were applied around the stationary point of the hemispherical body. By changing the total pressure ratio and number of the jets, the effects of each parameter on the drag reduction were analyzed and the interactions of the porous opposing jets were also discussed. The numerical results showed that opposing jet could reduce the drag of the hemispherical body effectively. With the increase of the total pressure ratio of the jets, the recirculation zone was enlarged and thus the drag reduction performance was improved. Moreover, the drag reduction performance was first improved and then dropped as the number of jets increased. In this study, two opposing jets obtained the best drag reduction performance with the highest percentage of the drag coefficient reduction as 29% due to the interaction of two opposing jets. The porous opposing jets demonstrated the possibility of achieving good drag reduction performance.

     

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