Impinging jets are used extensively in many heat and mass transfer applications found in industrial processes such as electronic component cooling, aircraft de-icing and turbine blade cooling. Impinging jets exhibit complex flow physics that is difficult to numerically simulate.
In the present experiments, a round pulsating jet with uniform jet exit velocity was studied at small H/D (= 2.0) while limiting the effect of entrainment by partial confinement. Our results indicated local and overall heat transfer enhancement at Re = 4,606 and 8,024 while a slight reduction was observed for Re = 13,513. The heat transfer measurements were accompanied by detailed planar particle image velocimetry (PIV) measurements.