涡轮叶栅外换热系数计算
External heat transfer predictions of turbine cascades
-
摘要: 采用求解三维雷诺平均Navier-Stokes(N-S)方程和带转捩模型的二方程Shear stress transport(SST)湍流模型,完成了MARKⅡ,VKI两个高压涡轮导叶叶栅及一个VKI高压涡轮动叶叶栅的外换热系数计算.计算结果与试验数据的对比表明,发展的带转捩模型的数值方法明显地提高了外换热系数的计算精度.Abstract: Three-dimensional Reynolds averaged Navier-Stokes(N-S) equations with Shear Stress Transport(SST) turbulence model were used to predict external heat transfer coefficients(EHTC) of turbine cascades.Atransition model was adopted to improve the accuracy.MARK-Ⅱ,VKIhigh pressure turbine stator cascade and VKIhigh pressure turbine rotor cascade were calculated.The computational results were compared with the experimental data,showing that the numerical method developed could effectively improve accuracy of external heat transfer prediction.
-
Key words:
- turbulence model /
- external heat transfer /
- turbine cascades /
- Navier-Stokes(N-S) equations /
- transition
-
[1] Crawford M E,Kays W M.STAN5 A program for numerical computation of two-dimensional internal/external boundary layer flow[R].NASA-CR-2742,1978. [2] Gaugler R E.Some modifications to and operating experience with the two-dimensional finite difference,boundary layer code,STANS[R].ASME Paper 81-GT-89. [3] Edlfelt R M C H,Elovic E.A two-dimensional boundary layer program for turbine airfoil heat transfer calculation[R].ASME Paper 82-GT-93. [4] Zeng J,Wang B,Kang Y.Numerical simulation of flow field in an annular turbine stator with film-cooled[R].Yokohama,Japan:The 24th ICAS Congress,2004. [5] 曾军.涡轮叶栅损失生成和输运的数值模拟[R].成都:中国航空学会动力分会第十二界叶轮机学术会议,2003. [6] 程信华,张剑,曾军.微型叶轮机气动设计研究[R].宜昌:中国航空学会动力分会第十三界叶轮机学术会,2005. [7] Menter F R.Two-equation eddy-viscosity turbulence models for engineering applications[J].AIAA Journal,1994,32(8):269-289. [8] Menter F R,Kuntz M,Langtry R.Ten years of industrial experience with SST turbulence model[M].CT:Turbulence Heat and Mass Transfer 4 Begell House Inc.,2003. [9] Menter F R,Langtry R B,Likki S R,et al.A correlation based transition model using local variables Part l-Model formulation[R].ASME-GT2004-53452. [10] Hylton L D,Mihelc M S,Turner E R,et al.Analytical and experimental evaluation of the heat distribution over the surfaces of turbine vanes[R].NASA CRl68015,1983. [11] Tony Arts.Aero-thermal performance of a two dimensional highly loaded transonic turbine nozzle guide vane[R].ASME 90-GT-358. [12] Tony Arts.External heat transfer study on a HP turbine rotor blade[R].Heat Transfer and Cooling in Gas Turbines.AGARD-CP-390:5-132. -
点击查看大图
计量
- 文章访问数: 1820
- HTML浏览量: 144
- PDF量: 425
- 被引次数: 0
下载: