Effect of Geometry Parameters on Low-speed Cavity Flow by Wind Tunnel Experiment

被引：1

作者：

Yang, Guangjun ^{[1
]}

Sun, Jing ^{[2
]}

Liang, Yong ^{[3
]}

Chen, Yingchun ^{[4
]}

机构：

[1] Natl Key Lab Sci & Technol UAV, Xian 710065, Peoples R China

[2] Northwestern Polytechni cal Univ, Sch Aeronaut, Xian 710072, Peoples R China

[3] China Aerodynam Res & Dev Ctr, Mianyang 622700, Peoples R China

[4] Commercial Aircraft Corp China Ltd, Shanghai 200232, Peoples R China

来源：

2014 AASRI CONFERENCE ON CIRCUIT AND SIGNAL PROCESSING (CSP 2014) | 2014年 / 9卷

关键词：

cavity; length to depth ratio; width to depth ratio; shear layer; sound pressure; PRESSURE OSCILLATIONS; SHALLOW CAVITIES;

D O I：

10.1016/j.aasri.2014.09.009

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, experiment platform for cavity flow is built in low-turbulence wind tunnel. based on the measurement of wall static pressure and sound pressure with microphones, the basic flow oscillation characteristics of different type cavity in low speed are studied. The effect of geometry parameters of length to depth ratio and width to depth ratio on cavity flow pattern and noise characteristics is obtained. The results show that in the incompressible flow state, the basic flow pattern of cavities is not affected by flow velocity; length-to-depth ratio of 1 to 12 covers the flow pattern from open to close, and with the length-to-depth ratio increase, the cavity radiation SPL increases; with aspect ratio increase, the sound pressure energy of cavity also increase. (C) 2014 The Authors. Published by Elsevier B. V.

引用

页码：44 / 50

页数：7

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