限流孔板在飞机空调管道的噪声分析及优化设计
Noise Analysis and Optimization Design of Restriction Orifice Plate in Aircraft Air Conditioning Duct
赵海宇 1周强 1宋经远 2王青山1
作者信息
- 1. 中南大学 高性能复杂制造国家重点实验室,长沙 410083
- 2. 中国航发沈阳发动机研究所,沈阳 110015
- 折叠
摘要
为分析限流孔板在飞机空调管道系统中的噪声特性以及对限流孔板进行降噪优化设计,本文首先运用CFD方法对含限流孔板的直管进行稳态流场数值计算,探究气流流经限流孔板的流动状态;然后基于大涡模拟法和FW-H方程,对管道进行瞬态流场以及声场计算,分析限流孔板在飞机驾驶舱监测点的流致噪声特性;最后,对比分析不同通流孔径的限流孔板对驾驶舱监测点噪声的影响规律,从而提出较优的限流孔板低噪声结构设计形式.研究结果表明:增大通流孔径可提高降噪效果,但压降性能降低,限流孔板降噪需结合其压降性能综合考虑.
Abstract
To analyze the noise characteristics of restriction orifice in aircraft air conditioning duct system and carry out the noise reduction optimization design of restriction orifice plate,the computational fluid dynamics method is used to calculate the steady flow field of a straight duct with the restrictor orifice at first and explore the flow state of the airflow through the orifice.Then,according to the large eddy simulation method and the Ffowcs Williams and Hawkings(FW-H)equation,the transient flow field and acoustic calculation of the duct are carried out,and the flow-induced noise characteristics of restriction orifice at the aircraft cockpit monitoring point are analyzed.Finally,the effects of restriction orifices with different aperture on the cockpit monitoring points are compared and studied,and a better low-noise structure design form of the orifice plate is proposed.The research results show that increasing the flow aperture can improve the noise reduction effect,but the pressure drop performance is reduced,and the noise reduction of the restriction orifice needs to be considered comprehensively with its pressure drop performance.
关键词
限流孔板/CFD方法/噪声特性/优化设计Key words
restriction orifice plate/CFD method/noise characteristics/optimization design引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据