CFD Analysis of Heat Transfer Due to Jet Impingement Onto a Heated Disc Bounded by a Cylindrical Wall

Abstract

This computational study aims to evaluate the cooling process due to an impinging oil jet in a cylindrically confined space on both stationary and high-speed reciprocating smooth discs with uniform heat flux and without phase change. The three-dimensional Navier–Stokes and energy equations are numerically solved using a finite-volume discretization. The volume of fluid model is employed in this study to capture the interface in multiphase flow (oil–air). A conjugate heat transfer formulation is used to couple the heat transfer at the interface between the solid and fluid. For jet impingement onto a stationary disc, the stagnation zone Nusselt number is higher and the overall surface average Nusselt number is smaller at a shorter impingement distance. For jet impingement onto a high-speed reciprocating disc, the higher heat transfer coefficient is associated with a higher rotational speed of the driven machine. The higher rotational speed also produces more effective cooling on the disc surface and a lower temperature within the disc.