Measurement and correction of high frequency jet noise

ZHANG Junlong; LEI Hongsheng; ZHAO Yu; LI Jie

doi:10.11729/syltlx20190103

Volume 34 Issue 4

Aug. 2020

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ZHANG Junlong, LEI Hongsheng, ZHAO Yu, et al. Measurement and correction of high frequency jet noise[J]. Journal of Experiments in Fluid Mechanics, 2020, 34(4): 16-21. doi: 10.11729/syltlx20190103

Citation:

ZHANG Junlong, LEI Hongsheng, ZHAO Yu, et al. Measurement and correction of high frequency jet noise[J]. Journal of Experiments in Fluid Mechanics, 2020, 34(4): 16-21. doi: 10.11729/syltlx20190103

Citation:

ZHANG Junlong, LEI Hongsheng, ZHAO Yu, et al. Measurement and correction of high frequency jet noise[J]. Journal of Experiments in Fluid Mechanics, 2020, 34(4): 16-21. doi: 10.11729/syltlx20190103

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Measurement and correction of high frequency jet noise

doi: 10.11729/syltlx20190103

1.
School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China
2.
Key Laboratory of Aerodynamic Noise Control, China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China

Received Date: 2019-08-18
Rev Recd Date: 2019-11-12
Publish Date: 2020-08-25

Abstract

Abstract

In order to improve the accuracy of high frequency measurement of jet far field noise, the factors affecting the high frequency measurement of jet noise have been systematically studied based on the experimental method of the strict jet noise simulator test equipment. These factors contain: the directivity of microphone, the frequency response characteristics of microphone, the influence of microphone protective cover, the noise floor of microphone and the effect of atmospheric absorption, etc. The experimental comparison and quantitative analysis of each influence factor have been carried out. Recommendations and correction methods for high frequency jet noise measurement are given. Finally, the location of geometric far field, which is very important for the accurate measurement of the high frequency radiation characteristics of far field jet noise, is proposed based on experimental measurement results.
- high frequency noise measurement,
- jet noise,
- far field measurement condition,
- correction method

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References(16)

References

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