Measurements are reported for the local heat transfer to an impinging air jet with and without a cross flow of air. At large jet-to-plate spacing the cross flow diminishes the peak heat transfer coefficient ; at a smaller spacing cross flow can increase the peak heat transfer coefficient. A correlation is obtained for the average heat transfer in the absence of cross flow.
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Acknowledgement--Three searchw as supportedb y a grant from the Division of Engineering Mathematicsa nd Geo-Scienceso f the U.S. Departmento f Energy.
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