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On-line Access: 2023-06-12
Received: 2022-11-27
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Lei XIE, Qiang DU, Guang LIU, Zengyan LIAN, Yaguang XIE, Yifu LUO. Investigation of flow characteristics in a rotor-stator cavity under crossflow using wall-modelled large-eddy simulation[J]. Journal of Zhejiang University Science A,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A2200565 @article{title="Investigation of flow characteristics in a rotor-stator cavity under crossflow using wall-modelled large-eddy simulation", %0 Journal Article TY - JOUR
基于壁面函数大涡模拟研究横流通道对转静系盘腔流动特性的影响机构:1中国科学院工程热物理研究所,轻型动力实验室,中国北京,100190;2中国科学院大学,工程科学学院,中国北京,100049;3中国科学院轻型动力创新研究院,中国北京,100190 目的:本文旨在探究带有均匀预旋速度的外部横流对转静系盘腔流动特性的影响,从而指导对真实发动机条件下涡轮盘腔流动特性的研究。 创新点:1.采用壁面函数大涡模拟(WMLES)方法,获得了带有横流通道的转静系盘腔更为精细的流场结构;2.识别了盘腔轮缘处的开尔文-赫姆霍茨(K-H)不稳定性,并探究了K-H剪切涡结构对轮缘处流动特性的影响。 方法:1.通过高精度大涡模拟方法,捕捉流场中的精细化流场结构。2.结合理论推导,通过对于流动结构的机理和动力学分析,探究外部横流和盘腔耦合流动特性。 结论:1.由于雷诺平均(RANS)模拟对壁面小尺度涡结构和输运方程的解析能力不足,所以RANS模拟流场与WMLES模拟流场出现了明显偏差。2.在横流和盘腔流动的耦合作用下,由于轮缘处的速度剪切诱导产生K-H涡结构,所以这些涡结构将会加强轮缘处的外部入侵和盘腔出流流动。3.在外部入侵和盘腔出流的影响下,盘腔端区发现了大尺度流动结构;这些大尺度流动结构以一定的转速旋转,且其转速和数量可以通过快速傅里叶变换以及相关性分析确定。 关键词组: Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article
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