Numerical Study of Flow and Heat Transfer Characteristics of Impingement/Effusion Cooling |
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| Authors: | Zhang Jingzhou Xie Hao Yang Chengfeng |
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| Institution: | Zhang Jingzhoua,Xie Haoa,b,Yang Chengfenga aCollege of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China bCollege of Power Engineering,Nanjing Normal University,Nanjing 210042,China |
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| Abstract: | Three-dimensional numerical simulation is carried out to investigate the flow and heat transfer characteristics of impingement/effusion cooling systems. The impingement/effusion holes are arranged on two parallel perforated plates respectively in a staggered manner. Every effusion hole has an inclined angle of 30° with respect to the surface. The two parallel plates are spaced three times the diameter of the effusion hole. The ratio of center-to-center spacing of adjacent holes to the diameter of the effusion hole is set to be 3.0, 4.0 and 5.0 respectively. The flow field, temperature field and wall film cooling effectiveness are calculated for different blowing ratios ranging from 0.5 to 1.5. In general, the wall cooling effectiveness increases as the center-to-center spacing of adjacent holes decreases or the blowing ratio increases. |
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| Keywords: | impingement/effusion blowing ratio cooling effectiveness heat transfer numerical simulation |
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