Non-stationary convective heat transfer in an air synthetic impinging jet. Experiment and numerical simulation

Abstract An unsteady local heat transfer in an air synthetic non-steady-state jet impingement onto a flat plate with variation of the Reynolds number, nozzle-to-plate distance and pulses frequency is experimentally numerically studied. Measurements averaged pulsating at stagnation point are conducted using flux sensor. The axisymmetric URANS method stress model used for numerical simulations. For values transfer, zones maximum instantaneous value coefficient identified. increases relatively low distances ( H / d ≤ 4). decreases high from orifice target surface. increase number causes reduction transfer.