Show simple item record

contributor authorLamyaa A. El-Gabry
contributor authorAli A. Ameri
date accessioned2017-05-09T00:47:23Z
date available2017-05-09T00:47:23Z
date copyrightJuly, 2011
date issued2011
identifier issn0889-504X
identifier otherJOTUEI-28774#031010_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/147795
description abstractThe necessity of performing an unsteady simulation for the purpose of predicting the heat transfer on the endwall surfaces of a turbine passage is addressed. This is measured by the difference between the two solutions obtained from a steady simulation and the time average of an unsteady simulation. The heat transfer coefficient (Nusselt number) based on the adiabatic wall temperature is used as the basis of the comparison. As there is no film cooling in the proposed case, a computed heat transfer coefficient should be a better measure of such difference than, say, a wall heat flux. Results show that the effect of unsteadiness due to wake passage on the pressures and recovery temperatures on both hub and casing is negligible. Heat transfer on the endwalls, however, is affected by the unsteady wake; the time-averaged results yield higher heat transfer; in some regions, up to 15% higher. The results for the endwall heat transfer were compared with results in open literature and were found to be comparable.
publisherThe American Society of Mechanical Engineers (ASME)
titleComparison of Steady and Unsteady RANS Heat Transfer Simulations of Hub and Endwall of a Turbine Blade Passage
typeJournal Paper
journal volume133
journal issue3
journal titleJournal of Turbomachinery
identifier doi10.1115/1.4002412
journal fristpage31010
identifier eissn1528-8900
keywordsPressure
keywordsTemperature
keywordsHeat transfer
keywordsWakes
keywordsBlades
keywordsHeat flux
keywordsReynolds-averaged Navier–Stokes equations
keywordsWall temperature
keywordsComputational fluid dynamics
keywordsAirfoils AND Turbine blades
treeJournal of Turbomachinery:;2011:;volume( 133 ):;issue: 003
contenttypeFulltext


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record