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contributor authorY. Yu
contributor authorM. K. Chyu
date accessioned2017-05-08T23:58:10Z
date available2017-05-08T23:58:10Z
date copyrightJuly, 1998
date issued1998
identifier issn0889-504X
identifier otherJOTUEI-28666#541_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/121308
description abstractThis study investigated a practical but never exploited issue concerning the influence of flow leakage through a gap downstream on the film cooling performance with discrete-hole injection. A heat transfer system as such can be categorized as either a three-temperature or a four-temperature problem, depending on the direction of leakage through the gap. To characterize a three-temperature-based film cooling system fully requires knowledge of both local film effectiveness and heat transfer coefficient. A second film effectiveness is necessary for characterizing a four-temperature problem. All these variables can be experimentally determined, based on the transient method of thermochromic liquid crystal imaging. Although the overall convective transport in the region is expected to be dependent on the blowing ratios of the coolants, the mass flow ratio of the two injectants, and the geometry, the current results indicated that the extent of flow injection or extraction through the gap has significant effects on the film effectiveness and less on the heat transfer coefficient, which is primarily dominated by the geometric disturbance of gap presence.
publisherThe American Society of Mechanical Engineers (ASME)
titleInfluence of Gap Leakage Downstream of the Injection Holes on Film Cooling Performance
typeJournal Paper
journal volume120
journal issue3
journal titleJournal of Turbomachinery
identifier doi10.1115/1.2841751
journal fristpage541
journal lastpage548
identifier eissn1528-8900
keywordsCooling
keywordsLeakage
keywordsTemperature
keywordsFlow (Dynamics)
keywordsHeat transfer coefficients
keywordsHeat transfer
keywordsLiquid crystals
keywordsCooling systems
keywordsCoolants
keywordsGeometry AND Imaging
treeJournal of Turbomachinery:;1998:;volume( 120 ):;issue: 003
contenttypeFulltext


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