Session: 12-05 Conjugate heat transfer investigations

Paper Number: 128219

128219 - Conjugate Modelling of a Fully Film Cooled Vane at Transonic Conditions 

Film hole cooling is widely as a means to allow for higher turbine inlet temperatures while keeping blade metal temperatures within a tolerable range of the material. Appropriate modelling of the heat transfer is needed to understand and identify localized high temperature zones on the blade surface that could lead to premature failure while operating at engine-like conditions. In order to accurately predict this, conjugate modelling is used to solve the heat transfer equations in both the solid and fluid flow fields simultaneously. The modes of heat transfer solved include convection outside the vane surface, conduction through the vane material, and convection of the cooling flow inside the vane channels. The purpose of this research is to use conjugate computational fluid dynamics (CFD) to model the film hole cooling of a turbine vane with showerhead cooling at transonic conditions. The operating conditions used were based on recent experimental data and the results were compared against the CFD model. Both Mach number and Reynolds number effects were evaluated at different blowing ratios in this study. The results from this work show that overall cooling effectiveness near the cooling holes increased with increasing blowing ratio despite the film cooling flow reaching blow-off conditions. Furthermore, the overall cooling effectiveness near the cooling holes increased with a higher exit Reynolds number in the mainstream flow. However, a higher mainstream exit Mach flow provided better cooling effectiveness at the leading and trailing edge of the vane than the higher blowing ratio did.

Presenting Author: Jacob Swartz The Pennsylvania State University

Presenting Author Biography: Jacob Swartz holds a B.S. in Chemical Engineering from The Pennsylvania State University and is a registered professional engineer within the state of Pennsylvania.

Authors:

Jacob Swartz The Pennsylvania State University
Stephen Lynch The Pennsylvania State University
Matthew Krull The Pennsylvania State University
Isabella Gayoso The Pennsylvania State University