Heat Transfer in Rectangle Channels with Bleeds Cooling Applications to Static Turbine Blade

• Main Authors: Sung Kuei Chih, 宋奎志
• Other Authors: Chang Shyy Woei
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/94718260598407395469

碩士 === 國立高雄海洋科技大學 === 輪機工程研究所 === 95 === An infrared imaging system is used to measure detailed contours of local heat transfer coefficient from twenty narrow rectangular channels with two opposite walls roughened by 450 staggered ribs with and without bleeds. Nusselt number（Nu） contours over the ribbed surfaces are presented for five sets of channels with an identical rib-floor configuration but different channel heights where the complex Nu distributions without bleed and then with bleeds from the scanned rib floor or from the ribbed wall opposite to the scanned rib floor or from the smooth sidewall are analyzed to examine the synergetic effects of variable channel heights and different bleed conditions on heat transfer. Spatially averaged heat transfer results for the entire set of test channels are generated with the thermal performance factors compared to establish the heat transfer correlations with applications to the design of coolant channels in a gas turbine blade.