Effect of crossflow regulation by varying jet diameters in streamwise direction on jet impingement heat transfer under maximum crossflow condition |
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| Authors: | Yongbin Ji Prashant Singh Srinath V. Ekkad Shusheng Zang |
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| Affiliation: | 1. Advanced Propulsion and Power Laboratory, Virginia Tech, Blacksburg, Virginia, USA;2. School of Mechanical Engineering, Institute of Turbomachinery, Shanghai Jiao Tong University, Shanghai, China |
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| Abstract: | Jet impingement heat transfer has been studied numerically for a maximum crossflow condition using a 3?×?9 array of jets. Five-hole configurations have been studied for jet average Reynolds numbers ranging from 10,000 to 20,000. Crossflow has been mitigated by varying the jet diameters in the streamwise direction to reduce the impact of crossflow on downstream jet impingement. The design criteria for all five configurations were to keep the average of the jet diameters equal to the constant jet diameter configuration (baseline). It has been found that the configuration with increasing and then decreasing jet diameters provided higher levels of heat transfer with more uniform cooling when compared to the traditional constant diameter configuration and other configurations. |
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