龚建英,朱江楠,杨林,金雅芬,刘立军,高铁瑜
GONG Jian-ying,ZHU Jiang-nan,YANG Lin,JIN Ya-fen,LIU Li-jun,GAO Tie-yu

• 1:西安交通大学

摘要(Abstract)：

模拟实际燃气轮机叶片内冷通道几何及传热结构,研究了蒸汽和空气在两面带有肋片的矩形通道中当雷诺数为10000~80000时的换热和摩擦特性。试验通道宽高比(肋片在宽面上)为0.5,肋间距p/e为10,通道阻塞比为0.047,试验通道长度L为1000mm。试验结果显示,蒸汽和空气在带肋通道中的平均换热系数,平均摩擦系数和换热性能随雷诺数的变化趋势几乎相同;在相同试验条件下,蒸汽在带肋通道中的平均换热系数比空气高30.2%,平均摩擦系数比空气高18.4%;蒸汽在带肋通道带肋面和光滑面上的换热性能比空气分别高8.4%和7.3%。
The heat transfer and fractional characteristic of air and steam in the ribbed rectangular channel were studied based on the geometry and heat transfer structure of practical gas turbine blade inner cooling channel at the Reynolds number is between10000 and 80000. The ratio of the channel width and height is 0. 5,the ratio of rib distance and rib height are 10,the ratio of rib height and channel hydraulic diameter are 0. 047 and the length of channel is 1000mm. The results show that the variation trend with Reynolds number of average heat transfer coefficient,average fraction coefficient and heat transfer property for the flow of steam and air in ribbed channel are nearly the same; the average heat transfer coefficient and average fraction coefficient are30. 2% and 18. 4% higher than air respectively; the heat transfer performance at the ribbed face and smooth face of steam are8. 4% and 7. 3% higher than air respectively.

关键词(KeyWords)： 燃气轮机;蒸汽冷却;矩形通道;换热特性;摩擦特性
gas turbine;steam cooling;rectangular channel;heat transfer characteristic;fraction performance

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划项目《大型动力装备制造基础研究》(2007CB7077)

作者(Author): 龚建英,朱江楠,杨林,金雅芬,刘立军,高铁瑜
GONG Jian-ying,ZHU Jiang-nan,YANG Lin,JIN Ya-fen,LIU Li-jun,GAO Tie-yu

参考文献(References)：

• [1]Han J C,Heat Transfer and Friction Characteristics in Rectangular Channels With Rib Turbulators[J].Journal of Heat Transfer,1988,110(2):321-328.
• [2]Park J S,Han J C,Huang Y,et al.Heat transfer performance comparisons of five different rectangular channels with parallel angled ribs[J].International Journal of Heat and Mass Transfer,1992,35(11):2891-2903.
• [3]Taslim M E,Li T,Spring S D.Measurements of Heat Transfer Coefficients and Friction Factors in RibRoughened Channels Simulating Leading-Edge Cavities of a Modern Turbine Blade[J].Journal of Turbomachinery,1997,119(3):601-609.
• [4]Taslim M E,Lengkong A.45 deg Staggered Rib Heat Transfer Coefficient Measurements in a Square Channel[J].Journal of Turbomachinery,1998,120(3):571-580.
• [5]Gao X,Sundén B.Heat transfer and pressure drop measurements in rib-roughened rectangular ducts[J].Experimental Thermal and Fluid Science,2001,24(1-2):25-34.
• [6]Warrier G R,Dhir V K,Momoda L A.Heat transfer and pressure drop in narrow rectangular channels[J].Experimental Thermal and Fluid Science,2010,26(1):53-64.
• [7]Bailey J C,Bunker R S.Heat Transfer and Friction in Channels With Very High Blockage 45°Staggered Turbulators[C].Proc.ASME Conference Proceedings,ASME,451-458.
• [8]Chang S W,Liou T M,Lu M H.Heat transfer of rectangular narrow channel with two opposite scale-roughened walls[J].International Journal of Heat and Mass Transfer,2005,48(19-20):3921-3931.
• [9]Chang S W,Liou T M,Chiang K F,et al.Heat transfer and pressure drop in rectangular channel with compound roughness of V-shaped ribs and deepened scales[J].International Journal of Heat and Mass Transfer,2008,51(3-4):457-468.
• [10]Rallabandi A P,Yang H,Han J C.Heat Transfer and Pressure Drop Correlations for Square Channels With45 Deg Ribs at High Reynolds Numbers[J].Journal of Heat Transfer,2009,131(7):071703-071710.
• [11]Guo T,Wang T,Gaddis J L.Mist/Steam Cooling in a Heated Horizontal Tube---Part 1:Experimental System[J].Journal of Turbomachinery,2000,122(2):360-365.
• [12]吴金星,尹凯杰,潘彦凯.蒸发式冷凝器的程序化设计及参数动态分析[J].流体机械,2011,39(3):83-86.
• [13]童蕾,谢顺鑫,陈超敏.蒸发式冷凝器在食品制冷设备改造工程中的应用研究[J].流体机械,2010,38(6):82-86.
• [14]魏小兵,江楠,梁帅.新型叠片式油冷却器传热及综合性能的研究[J].压力容器,2012,29(10):11-15.
• [15]魏小兵,江楠,曾纪成.新型纵向流油冷却器传热性能及压降的试验研究[J].压力容器,2012,29(6):13-17.
• [16]Guo T,Wang T,Gaddis J L.Mist/Steam Cooling in a180-Degree Tube Bend[J].Journal of Heat Transfer,2000,122(4):749-756.
• [17]Guo T,Wang T,L G J.Mist/steam cooling in a heated horizontal tube-Part 2:Results and modeling[J].Transactions of the ASME,2000,122(2):366-374.
• [18]Burdgick S S,Sexton B F,Kellock l R.Closed circuit steam cooled turbine shroud and method for steam cooling turbine shroud[Z].USA,2002:15.
• [19]Wang T,Gaddis J L,Li X.Mist/steam heat transfer of multiple rows of impinging jets[J].International Journal of Heat and Mass Transfer,2005,48(25-26):5179-5191.
• [20]Bohn D,Ren l,Kusterer K.Investigation of the steamcooled blade in a steam turbine cascade[J].Journal of Aerospace Power,2007,22(5):673-682.
• [21]Kütüküoglu A.Heat transfer to superheated steam flowing in tubes and annular channels[J].Heat and Mass Transfer,1970,3(3):174-184.
• [22]Han J C,Ou S,Park J S,et al.Augmented heat transfer in rectangular channels of narrow aspect ratios with rib turbulators[J].International Journal of Heat and Mass Transfer,1989,32(9):1619-1630.