A Numerical Study of Heat Transfer From an Array of Jets Impinging on a Flat Moving Surface

Abstract

A numerical study of heat transfer between circular jet arrays and the flat moving surface is carried out. Two jet patterns, inline and staggered, are chosen. A total of nine circular jets are used in both jet patterns. The analysis is carried out for steady and transient conditions with the turbulent flow of jet fluid. The steady-state analysis analyzes the effect of surface motion on the flow field and heat transfer through the jet arrays. The surface-to-jet velocity ratio (r) varies from 0 to 2. In transient analysis, the effect of jet pattern on the cooling of hot moving plate is analyzed. The two-equation shear stress transport (SST) k–ω turbulence model is used to solve Reynolds-averaged Navier–Stokes (RANS) equations of conservation of mass, momentum, and energy for incompressible turbulent flow. The steady-state analysis shows that surface motion has a significant effect on the flow field and heat transfer. The results of the transient analysis show that a staggering jet pattern cools the plate more uniformly than an inline jet pattern.