Design method of acoustic liner applied toaft-fan noise reduction and experimental validation

陈超; 闫照华; 李晓东

doi:10.13224/j.cnki.jasp.2018.12.026

Chinese

您当前的位置：

首页 >

文章列表页 >

Design method of acoustic liner applied toaft-fan noise reduction and experimental validation

更新时间：2026-07-07

- Design method of acoustic liner applied toaft-fan noise reduction and experimental validation
- Vol. 33, Issue 12, (2018)
- 作者机构：
  
  1. 北京航空航天大学能源与动力工程学院流体与声学工程实验室,北京,100191
  2. 上海飞机客户服务有限公司快速响应中心,上海,200241
- 作者简介：
- 基金信息：
- DOI：10.13224/j.cnki.jasp.2018.12.026
  CLC：
- Published：2018
- 稿件说明：
移动端阅览
陈超, 闫照华, 李晓东. 风扇后传声降噪声衬设计方法及实验验证[J]. 航空动力学报, 2018, 33(12). doi: 10.13224/j.cnki.jasp.2018.12.026

陈超, 闫照华, 李晓东. Design method of acoustic liner applied toaft-fan noise reduction and experimental validation[J]. 2018, 33(12).
陈超, 闫照华, 李晓东. 风扇后传声降噪声衬设计方法及实验验证[J]. 航空动力学报, 2018, 33(12). doi: 10.13224/j.cnki.jasp.2018.12.026 DOI：

陈超, 闫照华, 李晓东. Design method of acoustic liner applied toaft-fan noise reduction and experimental validation[J]. 2018, 33(12). DOI： 10.13224/j.cnki.jasp.2018.12.026.

摘要

针对航空发动机风扇后传声降噪问题，开展了外涵道降噪声衬设计方法研究。将声衬设计过程分为两步，通过采用基于半经验声阻抗模型的声衬设计方法针对给定的声源频率进行初步设计，获得较优的声阻抗及相应的声衬几何参数。之后在初步设计结果的基础上，利用基于高精度计算气动声学的声传播计算软件对声阻抗进行优化，并得到最终的优化方案。为验证提出的设计方法，在全消声室内的风扇后传声降噪声衬测试台分别对初步设计声衬和优化声衬进行了实验验证。实验中采用扬声器模拟风扇声源，给定声源模态为(1，0)，频率为3150Hz，内涵出口马赫数为0.8，外涵出口马赫数为0.6。结果表明：在给定的声源模态和频率下，初步设计的声衬可以取得10dB的降噪效果。优化设计的声衬相较于初步设计声衬，远场噪声可以再降低3~4dB。

Abstract

Liner design method applied to aft-fan noise reduction was implemented.The design phases were separated into two parts. In the first phase

an empirical impedance model was adopted to get the preliminary design. In the second phase

an optimization procedure was performed by numerical simulations based on high-order computational aeroacoustic method to achieve the optimal acoustic impedance and corresponding geometry parameters.In order to validate the method

an experimental investigation of aft-fan noise was carried out in the anechoic chamber of Beijing University of Aeronautics Astronautics.The fan noise source was modeled by a mode source generated by speakers.The circumferential mode was 1 and the radial mode was 0

the frequency was 3150Hz.The Mach numbers were 0.8 and 0.6 for the core and bypass ducts respectively. Experimental results showed that the preliminary design had 10dB insertion loss and the optimized liner achieved 3-4dB more attenuation.

关键词

Keywords

references

Views

461

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Acoustic characteristics test on aft-fan duct with titanium alloy annular acoustic liner

Sound absorption characteristics of resonator with multi slits under high sound pressure level

Study on the high-accuracy compact-finite-difference schemes for computational aeroacoustics

Numerical Simulation of Gust-Cascade Interaction Noise

Grid-Optimized Dispersion-Relation-Preserving Schemes for Non-uniform Cartesian Grids

Related Author

HUO Shiyu

YANG Jiafeng

DENG Yunhua

XU Jun

LI Xiao-dong

LIU Zhan-xin

HUANG Qi-bai

HU Li

Related Institution

School of Energy and Power Engineering,Beijing University of Aeronautics and Astronautics

Research and Development Center, Commercial Aircraft Engine Company Limited, Aviation Industry Corporation of China

College of Mechanical Engineering, Huazhong University of Science and Technology

School of Jet Propulsion, Beijing University of Aeronautics and Astronautics

Beijing University of Aeronautics and Astronautics

AI问答

Postal code：100079
Tel：（010）53879206 Email：tmw@bjxintong.com.cn
Technical support is provided by Beijing Founder electronics co., LTD 京ICP备09082226号-64 京公网安备11010602201714号
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰