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.
出处
《热能动力工程》
EI
CAS
CSCD
北大核心
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 )
