Local heat transfer in a rotating square channel with jet impingement

The influence of rotation and jet mass flow rate on the local heat transfer coefficient for a single confined impinging round jet with a fixed jet-to- wall spacing of H/d = 5 was studied for the jet Reynolds number from 6500 t o 26,000 and the rotational Reynolds number from 0 to 112,000. The local he al transfer coefficient along the surface is measured and the effect of the rotation an the stagnation (peak) paint, local and average Nusselt number is presented and discussed. Furthermore, a col relation was developed for t he average Nusselt number in terms of the parameters of Re, and Ren, In gen eral, the combined jet impingement and rotation effect are shown to affect the heat transfer response. Rotation decreases the average Nusselt number v alues from 15 to 25 percent in outward and inward radial pow, respectively. Finally, comparisons of the present data with existing results for multije ts with rotation were also made.