Heat transfer of impinging jet with low nozzle-plate spacing (effects of thickness of nozzle wall)

摘要

Impinging jet has excellent heat transfer characteristics around the stagnation point. As the nozzle-plate spacing decreases considerably, the heat transfer caracteristics is improved quickly. In this paper, the effects of thickness of nozzle wall on the flow and heat transfer characteristics of impinging jet with low nozzle-plate spacing are examined experimentally. The results show that the heat transfer characteristics is improved considerably and the flow resistance of nozzle-plate system decreases as increasing the thickness of nozzle wall。