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contributor authorSounik, Jeremy L.;Wright, Lesley M.
date accessioned2023-04-06T13:01:28Z
date available2023-04-06T13:01:28Z
date copyright12/5/2022 12:00:00 AM
date issued2022
identifier issn19485085
identifier othertsea_15_2_021009.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4288941
description abstractThe transient effect of unsteady wakes on film cooling effectiveness using a fast response pressure sensitive paint (PSP) was studied. Testing was performed in a fivepassage, lowspeed wind tunnel using a scaledup high pressure, blade profile. The blowing ratios studied include 0.4, 0.8, and 1.2 with a density ratio of 1.0 and 1.5 at each blowing ratio. An upstream wake generator produced Strouhal numbers of 0.1 and 0.3 while the wind tunnel inlet mainstream Reynolds number was held at a constant value of 300,000 for every test case. The results in this paper confirm the overall time averaged reduction in film cooling effectiveness with the addition of an unsteady wake while providing more detailed information on the transient response of the film cooling effectiveness, presented in the form of film cooling effectiveness RMS values. Results show that film cooling effectiveness RMS values increase on the leadingedge region of the blade and show little change on the pressure side of the blade with an increase in the Strouhal number. On the suction side, the areaaveraged effectiveness RMS values decrease for the 0.8 and 1.2 blowing ratios and remain unchanged for the 0.4 blowing ratio. A change in the density ratio of the coolant from 1.0 to 1.5 has a minimal effect on areaaveraged effectiveness RMS values for all areas of the blade.
publisherThe American Society of Mechanical Engineers (ASME)
titleEffects of Blowing and Density Ratios on Unsteady Film Cooling Effectiveness Using FastResponse PressureSensitive Paint
typeJournal Paper
journal volume15
journal issue2
journal titleJournal of Thermal Science and Engineering Applications
identifier doi10.1115/1.4056053
journal fristpage21009
journal lastpage2100911
page11
treeJournal of Thermal Science and Engineering Applications:;2022:;volume( 015 ):;issue: 002
contenttypeFulltext


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