高频射流噪声测量及修正方法研究

张俊龙; 雷红胜; 赵昱; 李杰

doi:10.11729/syltlx20190103

高频射流噪声测量及修正方法研究

doi: 10.11729/syltlx20190103

张俊龙^1,,
雷红胜²,
赵昱²,
李杰^1, ,

1.
西北工业大学航空学院, 西安 710072
2.
中国空气动力研究与发展中心气动噪声控制重点实验室, 四川绵阳 621000

详细信息

作者简介:
张俊龙(1980-), 男, 江西婺源人, 博士研究生。研究方向:气动声学。通信地址:四川绵阳涪城区剑门路西段278号。E-mail:jlzhang3@163.com

通讯作者:
李杰, E-mail: jlzhang3@163.com

中图分类号: V211.7;O358;O422.2
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- 文章访问数: 257
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- 被引次数: 0
出版历程
- 收稿日期: 2019-08-18
- 修回日期: 2019-11-12
- 刊出日期: 2020-08-25

Measurement and correction of high frequency jet noise

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

摘要

摘要: 为了提高射流远场噪声高频测量的精度，基于严格的射流噪声模拟试验装置，采用试验测量的方法，对影响射流噪声高频测量的因素进行了系统研究。具体研究包括传声器指向性、传声器频率响应特性、传声器保护罩、传声器本底噪声以及空气吸声效应等因素对射流噪声高频测量的影响。对各影响量进行了试验对比及量值分析，给出了射流噪声高频测量及修正的建议和方法。通过试验对比研究，给出了射流噪声远场测量边界的建议。
- 高频噪声测量 /
- 射流噪声 /
- 远场测量条件 /
- 修正方法
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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图 1 射流噪声远场测量照片

Figure 1. Photo of jet noise far field measurement

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图 2 典型1/4英寸自由场传声器频率响应曲线(0°入射角)

Figure 2. Typical frequency response for 1/4 inch free-field microphone (0° incidence)

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图 3 自由场传声器指向性测量试验

Figure 3. Photo of directivity measurement on free-field microphone

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图 4 1/2英寸自由场传声器指向性试验结果(相对0°入射角结果的差量, dB)

Figure 4. Directivity measurement results for 1/2 inch free-field microphone (Relative to 0° incidence results)

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图 5 不同入射角下的自由场修正结果

Figure 5. Free-field corrections for different angles of incidence

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图 6 传声器保护罩影响对比

Figure 6. Comparison of microphone with /without protection cover

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图 7 典型条件下的空气吸声量(1/3倍频程)

Figure 7. Atmospheric absorption under typical conditions (One-third octave band)

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图 8 射流噪声空气吸声修正结果对比

Figure 8. Comparison of the jet noise corrected by different air absorption correction methods

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图 9 传声器测得的射流噪声与自身本底噪声的对比

Figure 9. Comparison of the jet noise measured by microphone with the microphone's noise floor

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图 10 不同频率下射流噪声声压级随测点到喷口出口截面中心距离的变化，Ma=0.7

Figure 10. Variation of sound pressure level of different frequency jet noise with the distance from measuring point to nozzle center, Ma=0.7

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图 11 不同频率下射流噪声声压级随测点到喷口出口截面中心距离的变化，Ma=1.0

Figure 11. Variation of sound pressure level of different frequency jet noise with the distance from measuring point to nozzle center, Ma=1.0

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