喷管尺寸对超声速喷流噪声影响研究OA北大核心CSCDCSTPCD
Impact study of nozzle size on the supersonic jet noise
为研究喷管尺寸对超声速喷流噪声特性的影响及其声场分布规律而设计了冷流实验系统,选用3种不同尺寸的喷管,采用LMS数据采集系统及噪声处理软件,对不同喷管尺寸、不同来流压强下的喷流噪声进行了采集和处理.实验结果表明,超声速喷流噪声具有较强的指向性,随着测点偏离喷流中心轴线角度从30°增加到180°,其声压级峰值逐渐减小,峰值频率变化不大；随着喷管尺寸的增大,声压级逐渐增大,其峰值频率逐渐减小；在该实验工况下,声压级峰值分布在80～120 dB,随着喷…查看全部>>
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 deviatin…查看全部>>
韩磊;胡春波;李佳明;李林;刘小勇
西北工业大学,西安710072西北工业大学,西安710072西北工业大学,西安710072西北工业大学,西安710072西安航天动力研究所,西安710025
航空航天
超声速喷流噪声噪声场分布规律冷流实验系统合
supersonic jet noisenoise fielddistribution lawscold jet experimental system
《固体火箭技术》 2012 (3)
352-355,4
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