方柱/板结合部马蹄涡流动结构的动力学模态分解

王建明; 明晓杰; 王涵; 马阳; 王成军

doi:10.21656/1000-0887.380125

方柱/板结合部马蹄涡流动结构的动力学模态分解

doi: 10.21656/1000-0887.380125

沈阳航空航天大学航空航天工程学部辽宁省航空推进系统先进测试技术重点实验室, 沈阳 110136

基金项目: 国家自然科学基金（51476106）；辽宁省一流特色学科（15021540）

详细信息

作者简介:
王建明(1975—)，男，副教授，博士(通讯作者. E-mail: jmwang75@163.com).

中图分类号: O246
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- 被引次数: 0
出版历程
- 收稿日期: 2017-05-08
- 修回日期: 2017-05-15
- 刊出日期: 2018-01-15

Dynamic Mode Decomposition of Horseshoe Vortex Flow Structures Around Square PrismPlate Junctions

Liaoning Key Lab of Advanced Measurement and Test Technology for Aircraft Propulsion Systems, Faculty of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136, P.R.China

Funds: The National Natural Science Foundation of China（51476106）

摘要

摘要: 方柱/板结合部区域的马蹄涡系统存在多频流动现象.为了研究各频率所对应的振荡规律及其潜在的动力学信息，对方柱/板结合部处于周期振荡流动状态的马蹄涡系流动结构进行数值模拟，发现处于周期振荡流动状态的马蹄涡系为倍频流动现象.运用动力学模态分解（DMD）技术对方柱体上游对称面上的速度场进行模态分解，将所得到的第1、2、3阶模态分别叠加到平均流模态进行模态重构并在时域上进行推进演化分析.结果表明：周期振荡马蹄涡系以不同尺度马蹄涡间的相互卷并为主，发现了马蹄涡间不同的卷并方式.
- 方柱/板结合部 /
- 马蹄涡 /
- 周期振荡流动 /
- 动力学模态分解
Abstract: The multi-frequency phenomenon exists with the horseshoe vortex flow structure in junction flow. In order to demonstrate the oscillatory characteristics and the basic dynamics, the periodical oscillatory horseshoe vortex system was simulated near the square prism-plate junction. The periodical oscillatory flow of the horseshoe vortex makes a multi-frequency phenomenon. Then the velocity field in the plane of symmetry was decomposed with the dynamic mode decomposition (DMD) method. The 1st 3 modes were reconstructed and superposed on the mean flow mode respectively, and their progressive evolutions were analyzed. The results show that all the modes reveal the merging of horseshoe vortices in different sizes, and develop in different styles.
- square prismplate junction /
- horseshoe vortex /
- periodical oscillatory flow /
- dynamic mode decomposition (DMD)

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