K. Kim et Me. Crawford, Prediction of transitional heat transfer characteristics of wake-affected boundary layers, J TURBOMACH, 122(1), 2000, pp. 78-87
Citations number
25
Categorie Soggetti
Mechanical Engineering
Journal title
JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME
The presence of wake-passing in the gas turbine environment significantly m
odifies the heat transfer characteristics on the downstream blade surface b
y causing wake-induced transition. In this study, time-dependent boundary l
ayer calculations were carried out using a model for wake-induced transitio
n based on a prescribed time-dependent intermittent function. The model is
determined from the well-known turbulent spot propagation theory in a time-
space diagram and from experimental evidence in the ensemble-averaged sense
. Time-averaged heat transfer distributions are evaluated and compared with
experimental results for different flow and wake-generating conditions ove
r a flat plate. Comparison showed that the present time-dependent calculati
ons yield more accurate results than existing steady superposition models.