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| 非阻塞喷注噪声的A计权声功率的计算 | |
| 引用本文： | 李沛滋. 非阻塞喷注噪声的A计权声功率的计算[J]. 声学学报, 1989, 14(1): 73-76. DOI: 10.15949/j.cnki.0371-0025.1989.01.011 |
| 作者姓名： | 李沛滋 |
| 作者单位： | 中国科学院声学研究所 |
| 摘 要： | 喷注噪声的频谱是相似的。同一种介质的非阻塞喷注噪声的声功率谱随喷注直径的减小或喷注速度的增加而向高频移动,因而喷注噪声A计权声功率与喷注直径和喷注速度都有关系。本文使用-A声功率的连续计权函数和非阻塞喷注噪声的经验声功率谱函数计算了喷注噪声的A计权声功率与总声功率比值随喷注马赫数的增加而减小的关系。这个关系也可以用于估算因频谱的移动多喷口所获得的噪声降低。 |
| 收稿时间： | 1988-07-13 |
CALCULATION OF THE A-WEIGHTING SOUND PRESSURE OF JET NOISE |
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| LI Peizi. CALCULATION OF THE A-WEIGHTING SOUND PRESSURE OF JET NOISE[J]. ACTA ACUSTICA, 1989, 14(1): 73-76. DOI: 10.15949/j.cnki.0371-0025.1989.01.011 | |
| Authors: | LI Peizi |
| Abstract: | Noise radiated from different jets are similar. For a given fluid, the spectrum of jet noise shifts toward higher frequency with increasing jet velocity and decreasing jet size. Therefore, the A-weighting sound pressure of jet noise is dependent on jet size and jet velocity. In the paper, a continuous A-weighting function is used to calculate the A-weighting sound pressure of jet noise and the increasing of noise reduction with the increasing of jet stagnation pressure or Mach number is obtained. |
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