Heat Transfer Analysis From A Concave Surface Using Multiple Circular Jet Impingement With The Influence Of Turbulence Model

Abstract

A 5 x 5 inline array of circular jets of aspect ratios [h/d=1 & 1.5] is considered in this project, to make impingement on a simulated gas turbine leading edge. The leading edge is simulated as a semi cylindrical concave surface. The jets are emerging from the holes drilled in a fluid plenum, to which fluid is supplied. A constant surface temperature is assumed over the leading edge (concave surface) and the heat transfer studies are performed, analytically. The flow is turbulent in nature in the space between the jet exit and the impingement plate. Three fluids are considered for analysis and compared. The fluids are air, CO₂ and Helium. 2D models of the turbine blade with jet impingement is done in Creo 2.0. CFD Fluent analysis is done in Ansys. Analysis is carried out at different Reynolds number 8000, 12000 & 14000.