Prediction of wall heat transfer for a gas turbine combustor

This paper describes an improved method for predicting wall temperatures in gas turbine combustors in terms of critical parameters such as scale and p ressure. It is demonstrated that existing prediction techniques are not nec essarily applicable to small combustors and that a good part of it is due t o an imprecise knowledge of the hot gas temperatures within the recirculati on, primary and secondary zones. From the analysis of new experimental data , obtained recently in the Laval Combustion Laboratory, with wall temperatu re measurements at three different scales of the same combustor, a new volu me function was implemented in the formulation to account for scaling effec ts.