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

• 来源期刊: 中国科学:技术科学（英文版）
• 年，卷（期）: 2016,（5）
• 页码范围: 795-806
• 页数: 12页
• 语种: 中文
• DOI: 10.1007/s11431-015-6005-y

摘要

A new method of modifying the conventional k-ω turbulence model for comer separation is proposed in this paper.The production term in the ω equation is modified using kinematic vorticity considering fluid rotation and deformation in complex geometric boundary conditions.The comer separation flow in linear compressor cascades is calculated using the original k-ω model,the modified k-ωmodel 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-comodel and RSM.In terms of accuracy,the modified model,which significantly improves the performance of the original k-ω model for predicting comer separation,is quite competitive with the RSM.However,the modified model,which has considerably lower computational cost,is more robust than the RSM.