Far Noise Field of a Two-Dimensional Subsonic Jet
Far Noise Field of a Two-Dimensional Subsonic Jet
复制标题
二维亚音速射流的远噪声场
DOI：
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发表时间：
1974
期刊：
影响因子：
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通讯作者：
J. C. Yu
中科院分区：
文献类型：
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作者：
C. Kouts;J. C. Yu
本文对大展弦比亚音速冷缝喷流的声辐射特性进行了实验研究。在自由场环境和混响场环境中进行声学测量。缝射流的平均速度分布被确定，以提供有关流动的混合特性的信息。获得的自由场结果反映了缝隙喷气噪声的特征非对称方向性模式。总辐射声功率产生了一个典型的U到7次幂的平均射流速度的依赖。实验结果进行了比较，从类似的研究数据，也与圆形冷亚音速射流的辐射特性。
The acoustical radiation characteristics of a high aspect ratio, cold subsonic, model slot jet have been investigated experimentally. Acoustical measurements were made in both a free-field environment and a reverberation field environment. Mean velocity distribution of the slot jet was determined to provide information on the mixing characteristics of the flow. Free-field results obtained reflected a characteristic asymmetrical directivity pattern of the slot jet noise. The total radiated sound power yielded a typical U to the 7-th power dependence on mean jet velocity. The experimental findings are compared with data from similar studies and also with radiation characteristics of circular cold subsonic jets.