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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2009, Vol. 30 ›› Issue (9): 1624-1629.

• 流体力学、飞行力学与发动机 • Previous Articles     Next Articles

Numerical Investigation of Influence of Rotation of Film on Cooling Effectiveness over Rotating Curved Surfaces

Wu Hong, Meng Henghui, Tao Zhi, Xu Guoqiang, Ding Shuiting   

  1. School of Jet Propulsion, Beijing University of Aeronautics and Astronautics
  • Received:2008-07-07 Revised:2008-11-22 Online:2009-09-25 Published:2009-09-25
  • Contact: Meng Henghui

Abstract: A numerical study is conducted to investigate the cooling performance of films over rotating curved surfaces, and the influence of rotation number is obtained under different conditions. In the present study, the Reynolds number (Re) based on mainstream velocity and film hole diameter is 4 797, the blowing ratio (M) is 0.4, and the rotation number(Rt) changes from 0 to 0.023 9. A shearstress transports (SST) model is selected for turbulence closure. The results show that the effect of the rotation number is obvious: deflection angles are improved with the increasing rotation numbers; the augmentation of Rt results in decreased adiabatic effectiveness for convex surfaces, while for concave surfaces, increasing Rt leads to improved adiabatic effectiveness. In addition, increasing Rt tends to bridge the differences of film cooling effectiveness between the convex and concave surfaces.

Key words: film cooling, curvature, rotating, numerical simulation, adiabatic effectiveness

CLC Number: