边界元法在气冷涡轮叶栅气热耦合计算中的应用  

Application of Boundary Element Method in the Gas-thermal Coupled Calculation of an Air-cooled Turbine Cascade

作　　者：王振峰[1] 黄洪雁[1] 唐洪飞[1] 韩万金[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《热能动力工程》2010年第2期141-144,共4页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金资助项目(50706009;50576017)

摘　　要：将边界元计算方法应用到三维N-S方程求解程序中,流体部分采用有限差分法求解N-S方程,边界元法求解固体区域热传导方程。开发气热耦合计算程序对NASA-MarkII高压气冷涡轮叶栅热环境进行气热耦合分析。利用边界元法特有的优势(降维、解析与离散相结合的特点),避免了固体区域的网格生成和内部节点求解工作,提高了计算精度。结果表明,耦合计算程序能够高效、准确求解多场的气热耦合问题,计算结果与实验结果吻合的较好,二者平均误差为3%。A boundary element calculation method was used in a program for solving a three-dimensional N-S equation. The finite difference method was adopted in the fluid portion of the coupled calculation program to solve the N-S equation, and the boundary element method, to solve the heat conduction equation for the solid zone. A newly-developed gas-thermal coupled calculation program was employed to conduct a gas-thermal coupled analysis of the thermal environment in NASA-Mark II HP air-cooled turbine cascades. By utilizing the advantages (features combining a decrease in dimension with analysis and discreteness) specific to the boundary element method, the authors have avoided the grid generation in the solid area and the solution-seeking of interior nodes, thus enhancing the calculation precision. The calculation results show that the coupled calculation program can effectively and accurately solve the gas-thermal coupled problems in multiple fields. The results of calculation correspond relatively well with those of the test ones, and their average error is assessed at 3%.

关 键 词：燃气涡轮 空气冷却 气热耦合 边界元法 有限差分法 

分 类 号：TK472[动力工程及工程热物理—动力机械及工程]