| 离心叶轮背腔复杂流态及调控方法研究进展 |
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| 引用本文： | 伊卫林,邓海涛.离心叶轮背腔复杂流态及调控方法研究进展[J].推进技术,2022,43(1):34-43. |
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| 作者姓名： | 伊卫林 邓海涛 |
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| 作者单位： | 北京理工大学 机械与车辆学院 北京,北京理工大学 机械与车辆学院 北京 |
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| 基金项目： | 国家自然科学基金(51776018,51476010,51006100) |
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| 摘 要： | 因叶轮/扩压器转静间断，离心压气机级中必然存在引气腔并对级性能产生影响，中小型航空发动机/燃气轮机用半开式离心叶轮中背腔引气影响尤为突出。从简化及真实离心叶轮背腔流态研究、复杂流态调控方法、对级气动性能影响、叶轮/扩压器/背腔多维度耦合模拟方法等方面进行了综述，展示了背腔引气对风阻损失、轴向力平衡、油/气密封及冷却气输送等多方面重要影响，并对其可能的先进设计方法进行了分析与展望。
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| 关 键 词： | 离心叶轮 背腔 复杂流动 轴向推力 裕度 |
| 收稿时间： | 2020/6/16 0:00:00 |
| 修稿时间： | 2020/10/9 0:00:00 |
Review of Complex Flow Status and Control Methods for Rear Disk Cavity in Centrifugal Impeller |
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| YI Wei-lin,DENG Hai-tao.Review of Complex Flow Status and Control Methods for Rear Disk Cavity in Centrifugal Impeller[J].Journal of Propulsion Technology,2022,43(1):34-43. |
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| Authors: | YI Wei-lin DENG Hai-tao |
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| Institution: | School of Mechanical Engineering,Beijing Institute of Technology, |
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| Abstract: | Due to the discontinuity between rotational impeller and stationary diffuser, there must be a bleed air cavity in the centrifugal compressor stage, which will affect the performance of the stage. Research progress including the researches of flow status in simplified and real cavity, the method for controlling complex flow status, the influence on the aerodynamic performance of stage, the multi-dimensional simulation method coupling impeller, diffuser and rear cavity are reviewed. The important effects on windage loss, axial thrust balance and cooling gas delivery are present. Also, the possibly advanced design methods are analyzed and proposed. |
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| Keywords: | Centrifugal impeller Rear cavity Complex flow Axial thrust Surge Margin |
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