Flow impinging onto a conical cavity: A conical and annular nozzle combination

Abstract

Flow emanating from a combined conical and annular nozzle and impinging onto a conical cavity is considered. Two cone angles of the nozzle and two cavity depths are simulated for flow field around the nozzle and the cavity as well as for the heat transfer rates from the cavity surface. The conical cavity wall is assumed at 1500 K to resemble a laser-heated cavity and air is used as a working fluid. The Reynolds stress turbulence model is incorporated to account for the turbulence. It is found that the Nusselt number along the cavity surface is influenced by the cavity depth. The Nusselt number attains high values in the region close to the cavity edge. The wall shear stress at the cavity edge is influenced by the nozzle cone angle such that the shear stress increases for the nozzle cone angle of 70° in this region over values for the cone angle of 55°.