Numerical studies about the discharge coefficient of film cooling hole at narrow space

HU Bo; MAO Jun-kui; LIU Zhen-xiong; HUANG Ju

Volume 24 Issue 9

Sep. 2009

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Article Navigation > Journal of Aerospace Power > 2009 > 24(9): 1981-1988

HU Bo, MAO Jun-kui, LIU Zhen-xiong, HUANG Ju. Numerical studies about the discharge coefficient of film cooling hole at narrow space[J]. Journal of Aerospace Power, 2009, 24(9): 1981-1988.

Citation:

HU Bo, MAO Jun-kui, LIU Zhen-xiong, HUANG Ju. Numerical studies about the discharge coefficient of film cooling hole at narrow space[J]. Journal of Aerospace Power, 2009, 24(9): 1981-1988.

HU Bo, MAO Jun-kui, LIU Zhen-xiong, HUANG Ju. Numerical studies about the discharge coefficient of film cooling hole at narrow space[J]. Journal of Aerospace Power, 2009, 24(9): 1981-1988.

Citation:

HU Bo, MAO Jun-kui, LIU Zhen-xiong, HUANG Ju. Numerical studies about the discharge coefficient of film cooling hole at narrow space[J]. Journal of Aerospace Power, 2009, 24(9): 1981-1988.

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Numerical studies about the discharge coefficient of film cooling hole at narrow space

1.
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2.
Shanghai Vocational School of Civil Aviation Administration of China, Shanghai 200232, China

Received Date: 2008-08-28
Rev Recd Date: 2009-02-09
Publish Date: 2009-09-28

Abstract

Abstract

Numerical simulations about the discharge coefficient C_{d_{of film cooling at narrow space were carried out in this paper,and the characteristics of the flow around film hole in small cooling channel were also investigated.Blowing rate M(0.5～2.0),film cooling hole Reynolds number Re(5000～10000) and the ration of film cooling height to the film cooling diameter H/D(0.33～1.0) were changed to study the average discharge coefficient of a row of film holes.A finite volume method together with SIMPLE algorithm,second order upwind discrete format,was used to solve the three dimensional incompressible Navier-Stokes equations.The Realizable k-ε turbulence model was applied and non-equilibrium wall function was used for near wall treatment.The results show that the discharge coefficient C_{d_{increases with the blowing rate M,especially when the M＜1;under the same blowing rate conditions,the discharge coefficient decreases with the Re rising faintly.In the same Re cases,the C_{d_{becomes smaller when the H/D decreases.And the numerical results indicate that the decrease of C_{d_{is very notable especially when H/D＜0.75.}}}}}}}}
- film cooling,
- discharge coefficient,
- narrow space,
- numerical simulation