Measurements were made to investigate the local behavior of recovery factor and heattransfer coefficient with free-surface circular jets. The experiments were performed withtransfer oil jets impinging on vertical cons...Measurements were made to investigate the local behavior of recovery factor and heattransfer coefficient with free-surface circular jets. The experiments were performed withtransfer oil jets impinging on vertical constantuheat-flux surface from small pipe and orificenozzles of 1 mm diameter in the range of Re = 184 ~1920 and Pr = 120~ 400. Radialdistribution of recover factor was determined Heat transfer coefficient at stagnation pointfound to be independent of nozzle-to-plate spacing, but proportional to square root of jetReynolds number. Profiles of local heat transfer coefficients were obtained and correlated.展开更多
文摘Measurements were made to investigate the local behavior of recovery factor and heattransfer coefficient with free-surface circular jets. The experiments were performed withtransfer oil jets impinging on vertical constantuheat-flux surface from small pipe and orificenozzles of 1 mm diameter in the range of Re = 184 ~1920 and Pr = 120~ 400. Radialdistribution of recover factor was determined Heat transfer coefficient at stagnation pointfound to be independent of nozzle-to-plate spacing, but proportional to square root of jetReynolds number. Profiles of local heat transfer coefficients were obtained and correlated.