Modified k-ω model using kinematic vorticity for corner separation in compressor cascades

作者：Liu YangWei; Yan Hao; Fang Le^*; Lu LiPeng; Li QiuShi; Shao Liang

来源：Science China Technological Sciences, 2016, 59(5): 795-806.

DOI：10.1007/s11431-015-6005-y

• k-omega model
• kinematic vorticity
• corner separation
• compressor cascades

A new method of modifying the conventional k-omega turbulence model for corner separation is proposed in this paper. The production term in the. equation is modified using kinematic vorticity considering fluid rotation and deformation in complex geometric boundary conditions. The corner separation flow in linear compressor cascades is calculated using the original k-omega model, the modified k-omega model and the Reynolds stress model (RSM). The numerical results of the modified model are compared with the available experimental data, as well as the corresponding results of the original k-omega model and RSM. In terms of accuracy, the modified model, which significantly improves the performance of the original k-omega model for predicting corner separation, is quite competitive with the RSM. However, the modified model, which has considerably lower computational cost, is more robust than the RSM.

• 出版日期2016-5
• 单位北京航空航天大学