Numerical investigation of the passive control of cavity flow oscillations by a dimpled non-smooth surface

被引：16
|
作者：
Wang Y. [1 ,2 ,3 ]
Li S. [1 ]
Yang X. [3 ]
机构：
[1] Hubei Key Laboratory of Advanced Technology of Automotive Parts, Wuhan University of Technology, Wuhan
[2] Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan
[3] Wuhan Ordnance Noncommissioned Officers School, Wuhan
来源：
Wang, Yiping (wangyiping@whut.edu.cn) | 1600年 / Elsevier Ltd卷 / 111期
基金：
中国国家自然科学基金;
关键词：
Cavity flow oscillation; Dimpled surface; Numerical simulation; Passive control;
D O I：
10.1016/j.apacoust.2016.04.005
中图分类号：
学科分类号：
摘要：
Computational investigations are conducted to determine the effectiveness of a passive control technique, which was employed to decay the pressure oscillations induced by a subsonic flow over a cavity. This work focuses on a cavity with a small opening but a large volume. The passive control technique is employed by introducing a dimpled non-smooth surface, which is installed at the upstream of the cavity. Large eddy simulation is used to investigate the flow field and flow instability around the cavity for the smooth and non-smooth cases. Experiments are conducted in an acoustic wind tunnel for the smooth case to validate the computational scheme. Flow visualizations revealed that the dimpled surface located upstream effectively suppresses cavity flow oscillations. Finally, the control mechanism of cavity oscillation with the dimpled non-smooth surface is also determined based on the comparison of the flow field structure between the smooth and non-smooth cases. © 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：16 / 24
页数：8
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