충돌분류시스템의 열전달 특성에 관한 수치적 연구

Abstract

The heat transfer characteristics for air jet vertically impinging on a flat plate which had a set of hybrid rod was investigated numerically using the RNG turbulent model in the commercial finite-volume code FLUENT. The rods had a cross section made with a half of circular and rectangular cross section. The heating surface was given constant heat flux value of 1020 W/m2℃ and parameters investigated were jet Reynolds number, nozzle-to-plate spacing, the rod pitch and rod-to-plate clearance. Characteristics of the local and average Nusselt number were found to be dependent on the rod pitch and clearance because installing the rod disturbed the flow. Higher convective heat transfer rate occurred in the whole plate as well as in the wall jet region.