ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
PREDICTIONS OF HEAT TRANSFER IN TURBINE BLADES WITH A 2-EQUATION MODEL OF TURBULENCE
摘要
Free stream turbulence has an important effect on the local heat transfer coefficient around turbine blades, The prediction of this effect is attempted
within the framework of the k-ε model of
turbulence. Validation of the model with data for flat plate with imposed pressure gradients as well as turbine
cascade data is examined. It is found that qualitatively, the model predicts the observed trends,though there-are significant differences between the data sets
and the predictions. Somewhat better correlation
can be obtained by numerical modification of the Reynolds number dependency of the model, With the suggested
modification in the model, the predictions on the suction surface are encouraging and within about 30 per cent of the observed values.