Slot jet impingement heat transfer for the cases of moving plate and moving nozzle

Abstract

Jet impingement heat transfer for the case of extended surfaces is usually accomplished by employing arrays of impinging jets. Both the cases of moving plate and moving nozzle could be other options to transfer heat to/from the extended surfaces, which has been investigated numerically at the present study. Heat transfer distribution on a hot stationary flat plate was first specified for an unconfined slot laminar air jet impinging on the plate. Air jet Reynolds number and nozzle-to-plate separation were Re = 500 and H/W = 5, respectively. The effects of the moving plate and moving nozzle were then separately examined on both the flow and thermal fields. The distribution of the local Nusselt numbers was presented for a range of moving nozzle and moving plate. The analysis revealed that the Nusselt number decreased as the velocity of the plate or the nozzle was increased, where the effect of the moving nozzle was relatively substantial.