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http://dx.doi.org/10.3795/KSME-B.2002.26.7.927

Heat/Mass Transfer and Flow Characteristics Within a Film Cooling Hole of Square Cross Sections (I) - Effects of Blowing Ratio and Reynolds Number -  

Kang, Seung-Goo ((주)삼성전자 종합기술원)
Rhee, Dong-Ho (연세대학교 대학원)
Cho, Hyung-Hee (연세대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.26, no.7, 2002 , pp. 927-936 More about this Journal
Abstract
An experimental study has been conducted to investigate the heat/mass transfer characteristics within a film cooling hole of square cross-section for various blowing ratios and Reynolds numbers. The experiments have been performed using a naphthalene sublimation method and the flow field has been analyzed by numerical calculation using a commercial code. A duct flow enters into a film cooling hole in a cross-direction. For the film cooling hole with square cross-section, it is observed that the reattachment of separated flow and the vortices within the hole enhance considerably the heat/mass transfer around the hole entrance region. The heat/mass transfer on the leading edge side of hole exit region increases as the blowing ratios decrease because the main flow induces a secondary vortex. Heat/mass transfer patterns within the square film cooling hole are changed little with the various Reynolds numbers.
Keywords
Gas Turbine; Film Cooling; Square Cross Section Hole; Heat/mass Transfer; Naphthalene Sublimation Method;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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