某型飞机前起落架噪声特性研究 -- 西北工业大学学报,2016,34(3):456-459
论文:2016,Vol:34,Issue(3):456-459
引用本文:
刘兴强, 黄文超, 李红丽. 某型飞机前起落架噪声特性研究[J]. 西北工业大学学报
Liu Xingqiang, Huang Wenchao, Li Hongli. Research on Noise Characteristics for a Nose Landing Gear[J]. Northwestern polytechnical university

某型飞机前起落架噪声特性研究
刘兴强, 黄文超, 李红丽
中国飞机强度研究所, 陕西 西安 710065
摘要:
采用仿真与试验的手段对不同来流速度下某型飞机前起落架1/6缩比模型的噪声特性进行了研究。仿真基于"CFD+CAA"混合方法,气动噪声试验在声学风洞中进行。计算与试验结果的对比表明:特征平面的流场分布十分吻合,起落架下游产生大量的涡结构;低频噪声源位于机轮后缘附近,中高频噪声位于减振支柱与防摆支架之间;起落架噪声频谱呈现为宽频特性,计算结果与试验结果基本吻合;远场噪声呈现为典型的偶极子指向性,偶极子长轴与轮轴方向平行。
关键词:    气动噪声    起落架    气动噪声试验    Möhring声类比法   
Research on Noise Characteristics for a Nose Landing Gear
Liu Xingqiang, Huang Wenchao, Li Hongli
AVIC Aircraft Strength Research Institute, Xi'an 710065, China
Abstract:
Experiment and simulation are launched to study the aeroacoustic characteristics of a 1/6 scale aircraft nose landing gear in this paper. Simulation is based on the "CFD+CAA" hybrid method. And the flow and noise field is measured in an aeroacoustic wind tunnel. Comparing the results of the simulation with experiments indicate that, the flow field of the simulation agree with the experiment well. Low frequency noise source located around the wheels, and the middle and high frequency noise sources appear between the shock strut and Anti-twist bracket. The sound pressure spectrum curves are almost consistent in low and middle frequency range, and the spectrum of the far field noise is broadband, the dipole and monopole dominate the landing gear noise, and the directivity has a form of dipole.
Key words:    aeroacoustics    landing gear    aeroacoustic measurement    Möhring acoustic analogy   
收稿日期: 2015-10-27     修回日期:
DOI:
基金项目: 航空科学基金(20121223006)资助
通讯作者:     Email:
作者简介: 刘兴强(1987—),中国飞机强度研究所工程师,主要从事气动噪声控制的研究。
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