Turbulent flow and heat transfer characteristics of a two-dimensional oblique plate impinging jet

Turbulent flow and heat transfer characteristics of a two-dimensional oblique plate impinging jet (OPIJ) were experimentally investigated. The local heat transfer coefficients were measured using thermochronic liquid crystal. The jet mean velocity and turbulent intensity profiles were also measured along the plate. The jet Reynolds numbers (Re, based on the nozzle width) ranged from 10,000 to 35,000, the nozzle-to-plate distances (H/B) from 2 to 16, and the oblique angle (alpha) from 60 to 90 degree. It has been found that the stagnation point shifted toward the minor flow region as the oblique angle decreases and the position of the stagnation point nearly coincided with that of the maximum turbulent intensity. It has also been observed that the local Nusselt numbers in the minor flow region were larger than those in the major flow region for the same distance along the plate due mainly to higher levels in the turbulent intensity caused by more active mixing of jet flow.