C-8 多数のフイルム冷却孔における流れ場に関する実験的及び数値的研究(伝熱,一般講演)

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This paper presents the effect of pitch to pitch distance of multiple cooling holes. Two test models have been investigated with one having a 3D pitch to pitch distance and the other at 6D. Total of 20 cooling holes have been arranged to form a 5 times 4 matrix with the hole angle of 20°. The study involved a single Reynolds number value at 6200 with the characteristic length is base on the hole diameter designated at 10mm. 3D Laser Doppler Velocimeter have been used to measured the velocity data at two different BR = 1.0 and 2.0. Four measurement planes have been considered at the location of x/D = 7, 17, 27 and 37. The aerodynamics results presented in this paper include the distribution of normalize velocity for u, v, and w components, normalize root mean square velocity component of u. Additional investigation have been done through CFD to evaluate the capability of the given CFD scheme to predict the flow structure for the considered hole geometry and arrangement.
2011-07-06