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EXPERIMENTAL STUDY OF FLOW FIELDS IN THE VICINITY OF A FILM COOLING HOLE EXIT
作者姓名:Xu Hongzhou  Liu Songling  Xu Duchun
作者单位:Department of Aeroengines and Thermal Power Engineering,NorthwestrnPolytechnical University,Xi'an,China,710072
摘    要:Sofar,filmcoolingisextensivelyadoptedforprotectinghightemperaturepartsingasturbine.Manyresearchworksarefocusedonflow1~3Jandheattransfer4'5jinthedownstreamofthecircularhole,buttheflowcharacteristicsattheholeexit,especiallyforflaredholeexit,arenotreportedatpresent.Inordertodesignasuitab1eholeshapeforpracticalcoolingandprovideplentyexperimentaldataforverificationofcomputercodes,adetai1edexperimentalin-vestigationabout3-Dflowfieldsattheexitofasinglecircularandfan-shapedholehasbeencompleted.1Exp…


EXPERIMENTAL STUDY OF FLOW FIELDS IN THE VICINITY OF A FILM COOLING HOLE EXIT
Xu Hongzhou, Liu Songling, Xu Duchun.EXPERIMENTAL STUDY OF FLOW FIELDS IN THE VICINITY OF A FILM COOLING HOLE EXIT[J].Chinese Journal of Aeronautics,1997(2).
Authors:Xu Hongzhou  Liu Songling  Xu Duchun
Abstract:For the first time, an important ingested flow phenomenon was discovered inexperiments at the film cooling hole exit. The trends of 3-D flow fie1ds and the fullnessfactor, Ci, were discussed in detail over a wide range of now parameters and the geometryof fan-shaped holes at this exit plane. It has been confirmed that the main reason of creat-ing longitudinal bound vortices is not the flow iri the hole but the mixing of mainstreamand jet at its exit.
Keywords:film cooling  jet flow  flow distribution  vortices  fullness factor
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