Flow and heat transfer in rotor-stator system with pre-swirl angle of 30°
-
摘要: 用实验的方法对具有30°预旋进气的旋转盘附近冷气流动与换热特性进行了研究,得到了静 盘表面压力、转盘表面温度、局部努赛尔特数的分布及平均努赛尔特数的变化.结果显示静 止盘罩表面的压力随着半径的增加而增加,随转速的增加而增加.转盘表面的局部努赛尔特 数在r＜0.7R的区域基本不变, r＞0.7R的区域里, 局部努赛尔特数随r的增加而增大.该预旋 角情况下,进气雷诺数对盘面平均努赛尔特数的影响大于旋转雷诺数.Abstract: An experimental study of the flow and heat transfer characteristics in a pre-sw irl rotor-stator system was described. Pre-swirl cooling air thr ough nozzles with angle of 30° in the stator flows radially outwards and leav es system from the clearance between rotor and stator. The distributions of the pressure on the stator surface, temperature, local and averaged Nusselt number o n the rotating disk surface were obtained from the tests. The experiments reveal that the pressure on the stator surface increase as the radius and also increas e as rotating speed. The local Nu number will keep invariable when r＜0.7R(R is effective radius of rotating disk) in the rotating disk surface, but it will inc rease rapidly as radius when r＞0.7R. The cooling flow rate have more effects on average Nu number than rotating speed in this pre-swirl angle.
-
Key words:
- gas turbines /
- rotors /
- stators /
- pressure distribution /
- heat transfer coefficients
-
[1] Wilson M, Pilbrow R, Owen J M. Flow and heat transferi n a preswirl rotor-stator system[J]. Journal of Turbomachinery, 1997, 119:364 -373 [2] Pilbrow R, Karabay H, Wilson M, et al. Heat transfer in a "cover-plate " preswirl rotating-disk system[J]. Journal of Turbomachinery, 1999, 121:249 -256 [3] Lock G D, Wilson M, Owen J M . Influence of fluid dynamics on heat t ransfer in a pre-swirl rotating-disc system . ASME2004-GT-53158,2004 [4] Karabay H,Chen J X, Pilbrow R, et al. Flow in a "cover-plate" preswi rl rotor-stator system[J]. Journal of Turbomachinery, 1999, 121:160-166 [5] 徐国强,陶智,丁水汀,等,高位垂直进气旋转盘流动与换热的实验研究 [J].航空动力学报,2000,15(2):164-168 Xu Guoqiang, Tao Zhi, Ding Shuiting, et al. Experimental investigation on flow a nd heat transfer in shrouded rotating disk with high-positioned air flow [J] ．Journal of Aerospace Power, 2000,15(2):164-168(in Chinese) [6] 徐国强,丁水汀,邱绪光,等. 具有中心进气外缘加热旋转盘的局部换热特性研究[J].航空动力学报,1995,10(3):229-232 Xu Guoqiang, Ding Shuiting, Qiu Xuguang, et al. An investigation on local heat t ransfer performance for rim heated rotating disk with central air inflow[J]．J ournal of Aerospace Power, 1995, 10(3):229-232(in Chinese) -
点击查看大图
计量
- 文章访问数: 4058
- HTML全文浏览量: 46
- PDF下载量: 1014
- 被引次数: 0
下载:
