叶片弯曲对气冷涡轮叶栅气动性能影响的数值研究
Numerical Simulation of the Influence of Bowed Blade on the Performance of Turbine Cascade with Film-Cooling
-
摘要: 基于全三维N-S方程求解,采用具有G odunov性质的三阶精度TVD格式、分区算法以及自由型曲面技术,提供一种有效的方法来模拟气冷涡轮流场。在某型气冷涡轮叶片表面8个位置以及轮缘和轮毂进行喷气,并对采用直、弯叶片的涡轮流场进行了数值模拟。结果表明,叶片弯曲明显降低了有、无端壁喷气时的端部能量损失。在叶高中部喷气量较大时,弯叶片的气动性能下降较大。Abstract: Based on a 3D N-S solver,a computational method was adopted to simulate the flow field in film-cooling turbine,which included a finite difference scheme with 3rd order precision and TVD property,domain decomposition method and arbitrarily curved mesh technique.Air was ejected from 8 locations on the turbine blade surface and the upper and lower endwalls.Both the flow fields in the turbine cascade with straight and bowed blade were simulated.The results show that bowed blade apparently reduces the endwall losses whether with and without cooling.The aerodynamic performance of bowed blade becomes worse when the ejection flux is getting larger in the mid-span.
-
Key words:
- aerospace propulsion system /
- multi-block grid /
- film cooling /
- bowed blade /
- energy loss /
-
[1] Chernobrovkin A,Lakshminarayana B.Numerical Simulation and Aero-Thermal Physics of Leading Edge Film Cooling[R].ASME Paper 98-GT-504.,Stockholm,1998. [2] Dennis B H,Egorov I N,George S.Optimization of a Large Number of Coolant Passages Located Close to the Surface of a Turbine Blade[R].ASME Paper 2003-GT-38051.,Atlanta,2003. [3] Salcudean M,Garshore I,Zhang K.An Experimental Study of Film Cooling Effectiveness Near the Leading Edge of a Turbine Blade[J].ASME Journal of Turbomachinery,1994,116(1):71~79. [4] 王仲奇,苏杰先,钟兢军.弯曲叶片栅内减少能量损失机理研究的新进展[J].工程热物理学报,1994,15(2):147~152.Wang Zhongqi,Su Jiexian,Zhong jingjun.New Development of Research on Energy Loss Reduction in Bowed Blade Cas cade[J].Journal of Engineering Thermoph ysics,1994,15(2):147~152. [5] 王松涛.叶轮机三维粘性流场数值方法与弯叶片内涡系结构的研究[D].黑龙江:哈尔滨工业大学,1999. [6] Demuren O,Ibraheen S O.Multigrid Method for the Euler and Navier-Stokes Equations[J].AIAA Journal,1998,36(1):31~37. [7] 施法中.计算机辅助几何设计与非均匀有理B样条[M].北京:北京航空航天大学出版社,1 994:30~121. [8] 王松涛,颜培刚,孙玺淼,等.涡轮叶栅冷气掺混数值模拟方法[J].航空动力学报,2003,18(4):558~562.Wang Songtao,Yan Peigang,Sun Ximiao,et al.Numerical Method for Coolant Mixing in Turbine Cascade Flow Field[J].Journal of Aerospace Power,2 00 3,18 (4):558~562. [9] Friendrichs S,Hodson H P,Dawes W N.The Design of Improved Endwall Film-Cooling[J].Transactions of ASME 1997,119(5):788~793. [10] Oke R,Simon T,Shih T.Measurements Over a FilmCooled,Contoured Endwall With Various Coolant Injection Rates[R].ASME Paper 2001-GT-0140.,New Orleans.
点击查看大图
计量
- 文章访问数: 1530
- HTML浏览量: 1
- PDF量: 432
- 被引次数: 0