Modeling Of Convective Cooling Of A Rotating Disk By Partially Confined Liquid Jet Impingement

摘要

This paper presents the results of the numerical simulation of conjugate heat transfer during a semiconfined liquid jet impingement on a uniformly heated spinning solid disk of finite thickness and radius. This study considered various disk materials, namely, aluminum, copper, silver, Constantan, and silicon; covering a range of Reynolds number (220-900), Ekman number (7.08×10~(-5)-∞), nozzle-to-target spacing (β = 0.25-1.0), disk thicknesses to nozzle diameter ratio (b/d_n=0.25-1.67), and Prandtl number (1.29-124.44) using ammonia (NH_3), water (H_2O), flouroinert (FC-77), and oil (MIL-7808) as working fluids. The solid to fluid thermal conductivity ratio was 36.91-2222. A higher thermal conductivity plate material maintained a more uniform interface temperature distribution. A higher Reynolds number increased the local heat transfer coefficient. The rotational rate also increased the local heat transfer coefficient under most conditions.