风扇/增压级气动声学试验器设计及试验验证
Design and Test Verification of a Fan/Booster Aeroacoustic Stage Tester
张国旺 1杨明绥 1武卉 1闫力奇1
作者信息
- 1. 中国航发沈阳发动机研究所,沈阳 110015
- 折叠
摘要
风扇/增压级气动声学试验器是大涵道比涡扇风扇部件进行前传远场噪声特性评估、后传噪声特性评估、管道声模态特性评估、主/被动降噪措施验证等声学性能以及均匀流场气动性能测试的重要试验平台,在大涵道比发动机研制过程中发挥重要的作用.针对中国首个以适航噪声评估为主要目标的风扇/增压级气动声学试验器,介绍了其关键组成部分湍流控制屏和进气消声室的结构,进行了试验器功能验证和消声室声学性能鉴定.结果表明:消声室尖劈截止频率为125 Hz,在40 kHz的高频条件下,消声室满足自由场传播条件的区域达到22 m,消声室内设备空载运行时噪声低于45 dBA,在全转速范围内试验件及设备运行状态良好,其振动幅值均低于报警限制值,该试验器的各项性能指标均满足设计要求.该试验器已经完成了多项风扇/增压级部件声学及气动性能试验工作,具备相对成熟的风扇/增压级气动与声学性能试验测试技术能力.
Abstract
A fan/booster aeroacoustic test facility is an important test platform for testing the acoustic performance of the fan assembly of high bypass ratio turbofan engine,such as the forward transmission far-field noise characteristics evaluation,the rear transmission noise characteristics evaluation,the pipe acoustic modal characteristics evaluation,and the verification of active/passive noise reduction measures,as well as their aerodynamic performance under uniform flow field,it plays an important role in the development process of high bypass ratio engines.As the key components of China's first fan/booster aeroacoustic test facility with airworthiness noise evaluation for its main objective,the structure of the turbulence control screen and the inlet anechoic chamber,as well as the results of the function verifica-tion of the test facility and the acoustic performance evaluation of the anechoic chamber are introduced.The results show that the cutoff frequency of the anechoic chamber wedge is 125 Hz,and under the high-frequency conditions of 40 kHz,the area where the anechoic chamber meets the free field propagation conditions reaches 22 meters,The noise level of the anechoic chamber with the equipment oper-ated in no-load condition is less than 45 dBA.The test vehicle and equipment operate well within the full speed range,with vibration amplitudes lower than the alarm limits,and all performance indicators of the test facility meet the design requirements.The test facility has completed multiple acoustic and aerodynamic performance tests for fan/boost components,and has relatively mature technical capabili-ties for fan/boost aerodynamic and acoustic performance testing.
关键词
风扇/增压级/气动声学试验器/消声室/试验设备/声学性能测试Key words
fan/booster/aeroacoustic test facility/anechoic chamber/test equipment/acoustic performance testing引用本文复制引用
出版年
2024
NETL
NSTL
万方数据