Abstract
This paper describes the heat transfer characteristics of impinging jet on heated impingement surface with several blocks set in zigzag arrangement in a comparatively narrow space with confined wall. The velocity vectors, isothermal lines and Nusselt number distribution were obtained numerically by solving three-dimensional governing equations for the Reynolds number Re=1500, the dimensionless space H/D=0.67, a side of a block=10[mm] and the horizontal and vertical pitch 20 and 40[mm], respectively. The effective area is not remarkably affected by nozzle position. The unique distribution of the local heat transfer is obtained on the area beneath the nozzle corresponding to the flow situation The heat transfer on the block surface is improved on the upstream side.
