某型两级涡轮流场数值模拟  

Numerical Simulation of the Flow Field of a Two-stage Turbine

作　　者：吴猛[1] 王松涛[1] 冯国泰[1] 王仲奇[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》2001年第5期527-529,共3页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金资助项目 ( 5 96 36 180 )

摘　　要：应用三维粘性流计算程序对某型两级涡轮进行了数值模拟 ,该程序采用具有TVD性质的三阶精度Godunov格式 ,湍流模型为B -L代数模型 ,计算中考虑了变比热的影响。结果分析表明 ,由于该涡轮是采用考虑损失的S2 流面及单列粘性流计算设计的 ,没能很好地反映气流角的匹配问题 ,因此在第二级静叶中存在较大的正攻角 ,这使得第二级静叶采用后部加载叶型的作用不大 ,没有达到减少二次流损失的目的。因此 。Through the use of a three-dimensional viscous flow calculation program a numerical simulation was performed of a two-stage turbine. The program adopts a Godunov scheme of third-order accuracy with a turbulent flow model being of a B-L algebraic one. During the calculation the effect of a change in specific heat has been taken into consideration. An analysis of the calculation results indicates that there lacks a proper reflection of the matching of gas flow angles. This comes about because the gas turbine was designed and calculated through the use of a stream surface S2 and single row viscous flow with losses being taken account of. As a result, there emerged a relatively great positive incidence angle in the second stage stator, leading to an ineffective role of adopting a rear loading profile and a failure to achieve an decrease in secondary flow loss. In view of this it is necessary to conduct in the aerodynamic design a calculation of the matching of multi-stage viscous flows.

关 键 词：三维粘性流 数值模拟 两级涡轮 流体力学 流场 

分 类 号：O357.1[理学—流体力学]