基于拉格朗日拟序结构的局部激励流动分离控制有效性分析方法

doi:10.7527/S1000-6893.2015.0363

非定常流动数值模拟研究

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基于拉格朗日拟序结构的局部激励流动分离控制有效性分析方法

康伟¹, 张权麒¹, 代向艳², 刘磊¹

1. 西北工业大学航天学院, 西安 710072;
2. 空军工程大学航空航天工程学院等离子体动力学重点实验室, 西安 710038

收稿日期:2015-09-16 修回日期:2015-12-30 出版日期:2016-08-15 发布日期:2016-01-25
通讯作者: 康伟,Tel.:029-88494614。E-mail:wkang@nwpu.edu.cn E-mail:wkang@nwpu.edu.cn
作者简介:康伟,男,博士,讲师。主要研究方向:气动弹性与流动控制。Tel.:029-88494614。E-mail:wkang@nwpu.edu.cn;张权麒,男,大学本科生。主要研究方向:流动控制。Tel.:029-88494614。E-mail:wkang@nwpu.edu.cn;代向艳,女,博士研究生。主要研究方向:气动弹性与流动控制。Tel.:029-88494614。E-mail:daixiangyan302@163.com;刘磊,男,硕士研究生。主要研究方向:气动伺服弹性。Tel.:029-88494614。E-mail:wkang@nwpu.edu.cn
基金资助:
国家自然科学基金（11402212）；中央高校基本科研业务费专项资金（3102014JCQ01002）

A method for effectiveness analysis of flow separation control by local actuation based on Lagrangian coherent structures

KANG Wei¹, ZHANG Quanqi¹, DAI Xiangyan², LIU Lei¹

1. School of Astronautics, Northwestern Polytechnical University, Xi'an 710072, China;
2. Science and Technology on Plasma Dynamics Laboratory, School of Aeronautics and Astronautics Engineering, Airforce Engineering University, Xi'an 710038, China

Received:2015-09-16 Revised:2015-12-30 Online:2016-08-15 Published:2016-01-25
Supported by:
National Natural Science Foundation of China (11402212);the Fundamental Research Funds for the Central Universities (3102014JCQ01002)

摘要/Abstract

摘要：

从流体输运角度提出了用于局部周期激励流动分离控制有效性研究的数值分析方法。基于有限时间不变流形理论建立用于非定常流动的流体输运分析方法，并采用数值方法从非定常流场中提取得到吸引拉格朗日拟序结构（LCSs）和排斥LCSs描述流体输运行为。通过对局部周期激励的流动分离控制规律的研究，结果表明存在三种与激励频率相关的影响翼型气动特性的流体输运模式，其中在锁频激励下吸引LCSs在前缘形成的尖楔结构有效增强主流与分离区流体的物质交换，减小翼面流动分离区的面积，显著提高翼型升力。

关键词: 流动分离, 流动控制, 锁频, 流体输运, 拉格朗日拟序结构, 增升

Abstract:

A numerical method for the effectiveness analysis for the flow separation control by local periodic actuation is presented from the perspective of fluid transport. Finite time invariant manifold theory is used for the establishment for fluid transport analysis of unsteady flow. The attracting Lagrangian coherent structures (LCSs) and the repelling LCSs are extracted from the unsteady flow field using numerical method to describe the behaviors of fluid transport. Study on the flow separation control of local periodic excitation indicates that there exist three kinds of fluid transport mode with actuating frequency affecting the aerodynamic performance of the airfoil. In particular, as the actuation with lock-in frequency is activated, the material spike formed at the leading edge from the attracting LCSs effectively enhances the fluid exchange between mainstream and separation region, which reduces the area of separation zone, and significantly improves the airfoil lift.

Key words: flow separation, flow control, frequency lock-in, fluid transport, Lagrangian coherent structure, lift enhancement

中图分类号:

V211.3

康伟, 张权麒, 代向艳, 刘磊. 基于拉格朗日拟序结构的局部激励流动分离控制有效性分析方法[J]. 航空学报, 2016, 37(8): 2490-2497.

KANG Wei, ZHANG Quanqi, DAI Xiangyan, LIU Lei. A method for effectiveness analysis of flow separation control by local actuation based on Lagrangian coherent structures[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(8): 2490-2497.

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E-mail：hkxb@buaa.edu.cn

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基于拉格朗日拟序结构的局部激励流动分离控制有效性分析方法

A method for effectiveness analysis of flow separation control by local actuation based on Lagrangian coherent structures

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