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contributor authorRonald S. Bunker
date accessioned2017-05-09T00:26:13Z
date available2017-05-09T00:26:13Z
date copyrightApril, 2007
date issued2007
identifier issn0889-504X
identifier otherJOTUEI-28736#193_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/137052
description abstractThe advancement of turbine cooling has allowed engine design to exceed normal material temperature limits, but it has introduced complexities that have accentuated the thermal issues greatly. Cooled component design has consistently trended in the direction of higher heat loads, higher through-wall thermal gradients, and higher in-plane thermal gradients. The present discussion seeks to identify ten major thermal issues, or opportunities, that remain for the turbine hot gas path (HGP) today. These thermal challenges are commonly known in their broadest forms, but some tend to be little discussed in a direct manner relevant to gas turbines. These include uniformity of internal cooling, ultimate film cooling, microcooling, reduced incident heat flux, secondary flows as prime cooling, contoured gas paths, thermal stress reduction, controlled cooling, low emission combustor-turbine systems, and regenerative cooling. Evolutionary or revolutionary advancements concerning these issues will ultimately be required in realizable engineering forms for gas turbines to breakthrough to new levels of performance. Herein lies the challenge to researchers and designers. It is the intention of this summary to provide a concise review of these issues, and some of the recent solution directions, as an initial guide and stimulation to further research.
publisherThe American Society of Mechanical Engineers (ASME)
titleGas Turbine Heat Transfer: Ten Remaining Hot Gas Path Challenges
typeJournal Paper
journal volume129
journal issue2
journal titleJournal of Turbomachinery
identifier doi10.1115/1.2464142
journal fristpage193
journal lastpage201
identifier eissn1528-8900
keywordsCooling
keywordsTurbines
keywordsFlow (Dynamics)
keywordsGas turbines
keywordsDesign AND Heat transfer
treeJournal of Turbomachinery:;2007:;volume( 129 ):;issue: 002
contenttypeFulltext


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