微型涡轮的旋转盘腔内流场二维与三维数值模拟的比较  

Comparison of numerically simulated with two and three dimensional for the rotating cavity with micro- turbines

作　　者：杨小利[1] 冯青[1] 韩江峰[1] 

机构地区：[1]西北工业大学动力与能源学院,西安710072

出　　处：《机械设计与制造》2005年第8期69-71,共3页Machinery Design & Manufacture

摘　　要：用FLUENT软件对带有微型涡轮的旋转盘腔内部流场进行了二维和三维的数值模拟。在数值计算中应用标准K-epsilon双方程湍流模型,通过计算研究发现:二维和三维数值计算在低旋转雷诺数时趋于一致,随着旋转雷诺数增加三维效应增强计算结果差距增大。研究结果显示:涡轮内部螺栓和微型涡轮的不同处理方式是导致二者数值模拟差异的主要原因。Flow field was numerically simulated with two and three dimensional for the rotating cavity with micro- turbines. The standard k- epsilon turbulence model was adopted in the computation. The computation results shows that ： Under the low rotational Reynolds number the agreement between the two and three dimensional computation is mainly very good. But with increasing the rotational Reynolds number the difference of the computational results increases. It shows that the influence of the three- dimensional effects becomes strong as the rotational Reynolds number increases. The study shows that the difference settlement of the internal- flange bolts of the turbine cavity and the micro- turbines are the main reasons which lead to the difference between the two and three dimensional computation.

关 键 词：旋转盘腔 流场计算 旋转雷诺数 内部螺栓 

分 类 号：V23[航空宇航科学与技术—航空宇航推进理论与工程] TP391[自动化与计算机技术—计算机应用技术]