| 唐明智1，金东海1，2，郭昕3，桂幸民1，2.掠叶片进口流场中周向不均匀性的影响[J].航空发动机,2018,44(4):8-15 |
| 掠叶片进口流场中周向不均匀性的影响 |
| Effect of Circumferential Non-uniformity on the Inlet Flow Fields of a Swept Blade |
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| DOI： |
| 中文关键词: 掠叶片 通流模型 周向平均方法 周向不均匀性 应力输运模型 |
| 英文关键词:swept blade,throughflow model circumferential average method （CAM） circumferential non -uniformity stress
transport model |
| 基金项目:国家自然科学基金（51236001）、国家基础研究项目（2012CB720201）、北京自然科学基金（3151002）资助 |
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| 中文摘要: |
| 为模化并分析迎角改变时掠叶栅流场中周向不均匀性的影响，将1 种应力输运模型整合到通流模型中，并应用于某掠
叶栅的计算。通过给定掠叶栅不同来流迎角开展3D 数值模拟和通流计算，结果表明：主要由无黏叶片力所诱发的周向不均匀性会
重新组织叶片通道的进口流场，改变进口气流角，从而引发掠叶栅进口径向平衡的重新分布，随着迎角的提高，这种周向不均匀性
将加强，其对进口流动的影响也会进一步增大。加入该应力输运模型后，通流模型能够很好地预测周向脉动源项，在前缘前其计算
值与3D 计算结果的偏差在20%以内，对叶片通道进口气流角改变量的预测精度提高了25%以上，对进口流动径向平衡的描述精度提高了60%以上 |
| 英文摘要: |
| order to model and analyze the effect of the circumferential non-uniformity on the flow field of a swept cascade,a kind of
stress transport model was integrated into the throughflow model. 3D numerical simulation and throughflow calculation of a swept cascade
were carried out at different inlet angles of the given cascade. The results show that the non-uniformity induced by the inviscid blade force
will reorganize the inlet flow field of the blade passage and change the inlet flow angle,thus causing the redistribution of the radial balance
of the inlet. With the increase of incidence angle,the circumferential non-uniformity will be strengthened,and its influence on the inlet
flow will also increase.After adding the stress transport model,the throughflow model could predict the circumferential pulse source well.
The descrepancy between the throughflow value and the 3D calculation results is within 20% before the leading edge. The prediction
accuracy of the inlet flow angle change of the blade passage raised by 25%, and the description accuracy of the radial balance of the inlet
flow is raised by more than 60%. |
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