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http://dx.doi.org/10.3795/KSME-B.2004.28.4.456

Flow and Heat Transfer Within a Rectangular Film Cooling Hole of Normal Injection Angle  

Hong, Sung-Kook (연세대학교 대학원)
Lee, Dong-Ho (연세대학교 대학원)
Kang, Seung-Goo (㈜삼성전자)
Cho, Hyung-Hee (연세대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.28, no.4, 2004 , pp. 456-466 More about this Journal
Abstract
An experimental study has been conducted to investigate the flow and heat/mass transfer characteristics within a rectangular film cooling hole of normal injection angle for various blowing ratios and Reynolds numbers. The results are compared with those for the square hole. The experiments have been performed using a naphthalene sublimation method and the flow field has been analyzed by numerical calculation using a commercial code (FLUENT). The heat/mass transfer around the hole entrance region is enhanced considerably due to the reattachment of separated flow and the vortices generated within the hole. At the hole exit region, the heat/mass transfer increases because the main flow induces a secondary vortex. It is observed that the overall heat/mass transfer characteristics are similar to those for the square hole. However, the different heat/mass transfer patterns come out due to increased aspect ratio. Unlike the square hole, the heat/mass transfer on the trailing edge side of hole entrance region has two peak regions due to split flow reattachment, and heat/mass transfer on the hole exit region is less sensitive to the blowing ratios than the square hole.
Keywords
Gas Turbine; film Cooling; Rectangular Hole; Heat/Mass Transfer; Naphthalene Sublimation Method;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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