Experimental and Numerical Study of Film Cooling with Internal Coolant Cross-Flow Effects |
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| Authors: | W Peng P-X Jiang |
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| Institution: | 1. Key Laboratory for Thermal Science and Power Engineering of Ministry of Educations, Department of Thermal Engineering , Tsinghua University , Beijing , China;2. Institute of Nuclear and New Energy Technology, Tsinghua University , Beijing , China;3. Key Laboratory for Thermal Science and Power Engineering of Ministry of Educations, Department of Thermal Engineering , Tsinghua University , Beijing , China |
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| Abstract: | This study experimentally and numerically analyzes the effect of the coolant cross-flow on film-cooling effectiveness. The three kinds of film holes considered are cylindrical, fan-shaped, and trenched holes. The results show that the internal coolant flow has a large effect on film cooling. The film-cooling effectiveness of the cross-flow coolant model is larger than that of the plenum model for the cylindrical and trenched holes, but it is less for the fan-shaped hole. A comparison of the experimental and numerical results shows that the Reynolds averaged Navier–Stokes model exaggerated the coolant diffusion downstream but underestimates the lateral distribution. |
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| Keywords: | film cooling cross-flow coolant model plenum model gas turbine |
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