Özet:

In this study, it has been experimentally studied the cooling of the target surface consisting of a circular flat sheet with a fixed heat flow using a pulse-touching jet. In the reviews, the distance between the target surface and the jet output (H/D), the pulsative jet width (Ao) and the frequency (Wo) were changed, while the jet Reynolds number (Rej), Prandtl number (Pr) and geometric parameters were kept stable and the effects of these parameters on the heat transfer were analyzed. The experiments were made for three different collision distances, four different widths and six different frequencies. The temperature measurements were made in detail on the experimental arrangement manufactured for the pulsative jet used as the method of improvement of the active heat transfer and the Nusselt numbers were calculated with the help of the temperatures measured. The results were expressed in non-dimensional numbers, and the results were compared to the results of the heat transfer resulting from a constant jet collision. Experimental findings have shown that pulsative jet has a significant effect on the improvement of heat transfer. In comparisons, it has been observed that the pulsative jet has significantly improved the heat transfer according to the constant jet.

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