Impinging jet cooling of wall Mounted cubes

This paper reports on the flow structure and the surface temperature distribution of a heated wall-mounted cube from an in-line array, subjected to cooling by the combined action of a channel flow and an impinging jet. The impinging jet issues from a round nozzle at the top wall. The turbulent flow field around the cube (measured with Particle Image Velocimetry (PIV)) and the temperature distribution on the surfaces of the cube (evaluated from an infrared imaging system) were determined for two different relative positions of the jet nozzle and the cube. The local flow structure in terms of flow separation and reattachment, and the rolling up of separating shear layers, has a marked influence on the local temperature distribution on the surface of the cube.