固体火箭技术2012，Vol.35Issue(3)：352-355,4.
喷管尺寸对超声速喷流噪声影响研究
Impact study of nozzle size on the supersonic jet noise
韩磊 1胡春波 1李佳明 1李林 1刘小勇2
作者信息
- 1. 西北工业大学,西安710072
- 2. 西安航天动力研究所,西安710025
- 折叠
摘要
Abstract
To investigate the characteristics of supersonic jet noise and the impact of nozzle size on the acoustic distribution,a cold jet experimental system was designed in this paper. The jet noise from different size of nozzle and in different flow pressure was measured by the LMS data acquisition system and analyzed by the noise processing software. Experiment results show that the supersonic jet noise has a strong directionality,with the measuring point deviating from the central axis of the jet from 30° to 180°,the peak of the sound pressure level decreases, and the peak frequency changes little. With the increase of nozzle size, the sound pressure level increases,and the peak frequency decreases. Under this experiment conditions,the sound pressure level distributes at the bounds of 80 ~ 120 dB,and the peak frequency increases from less than 6 000 Hz to more than 11 000 Hz when the throat diameter of the nozzle decreases from 10 mm to 5 mm.关键词
超声速喷流噪声/噪声场/分布规律/冷流实验系统合Key words
supersonic jet noise/noise field/distribution laws/cold jet experimental system分类
航空航天引用本文复制引用
韩磊,胡春波,李佳明,李林,刘小勇..喷管尺寸对超声速喷流噪声影响研究[J].固体火箭技术,2012,35(3):352-355,4.
