静止环形扩压叶栅激励下的耦合流动分析

基金项目: 国家自然科学基金资助(10477002)

Coupled Flow Analysis on the Excitation Effect in Annular Enlarged Cascade

National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

摘要: 针对某静止环形叶栅的激励实验工作,相应的对扩压叶栅进行了不同气流攻角和激励频率的非定常粘性计算与流场分析。计算中,结合实验结果分析了在不同气流攻角下,激励频率对损失系数、负荷系数、功损比等性能的影响。计算结果揭示了在激励流动下流场的时空结构的变化是流场性能得到提升的根本原因。
- 航空、航天推进系统 /
- 环形叶栅 /
- 非定常流动 /
- 旋涡脱落频率 /
- 激励
Abstract: In regard to the excitation experiments,time-Accurate numerical stimulation was carried out to investigate the upstream disturbance frequency effect under different incidence in an annular cascade.Combined with experimental results,the disturbance frequency effect on loss coefficient,load factor,and work-loss ratio was discussed.The change of time-space flow structure is the principal cause of the performance improvement.
- aerospace propulsion system /
- annular cascade /
- unsteady flow /
- vortex shedding frequency /
- excitation

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