Abstract
The influence of synthetic air jet temperature on local heat transfer distribution of a synthetic air jet impinging on a smooth flat surface is investigated experimentally. The actuator frequency (f = 100 Hz to 300 Hz) and jet to orifice spacing (z/d = 1 to 8) is considered for the present study. The local heat transfer study is obtained using thin foil and IR thermal imaging technique. At z/d = 1, the Nusselt number characteristics are found approximately 2 times greater when synthetic air jet temperature is considered as jet air temperature instead of surrounding air temperature for all the frequencies. The experimental results observed that heat transfer distribution is strongly influenced by synthetic air jet temperature especially at lower orifice to jet distance.
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