Volume 31 Issue 1
Jan.  2016
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ZHONG Jing-jun, WEI Man, LU Hua-wei. Experiment on effect of pressure-side winglet on flow field in turbine cascade at different tip clearances[J]. Journal of Aerospace Power, 2016, 31(1): 84-91. doi: 10.13224/j.cnki.jasp.2016.01.012
Citation: ZHONG Jing-jun, WEI Man, LU Hua-wei. Experiment on effect of pressure-side winglet on flow field in turbine cascade at different tip clearances[J]. Journal of Aerospace Power, 2016, 31(1): 84-91. doi: 10.13224/j.cnki.jasp.2016.01.012

Experiment on effect of pressure-side winglet on flow field in turbine cascade at different tip clearances

doi: 10.13224/j.cnki.jasp.2016.01.012
  • Received Date: 2015-05-05
  • Publish Date: 2016-01-28
  • Detailed experiments were carried out to investigate the effect of the tip clearance flow in a turbine cascade with different width pressure-side winglets.The flow field of the cascade outlet and the static pressure distribution on the blade surface were surveyed in detail at different tip clearance height of 0.5%h, 1%h, 1.5%h.The results show that, as the tip clearance height increases, the leakage flow is intensified, the leakage vortex is strengthened, the total loss of cascade is increased, and the up channel vortex is weakened.Pressure-side winglet has a good effect at the 0.5%h tip clearance height, the total loss of the cascade is reduced by 18% with width being 0.4 times of the local blade thickness.0.3 times of the local blade thickness case reduces the total loss of the cascade by 10.37% at the 1%h tip clearance height.At the 1.5%h tip clearance height, the pressure-side winglet almost has no effect on clearance leakage flow, but reduces the total loss of the cascade to a certain extent.

     

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