| 锅炉换热器管道泄漏口声辐射指向性特征数值研究 |
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| 引用本文： | 姜根山,安连锁,杨昆. 锅炉换热器管道泄漏口声辐射指向性特征数值研究[J]. 中国电机工程学报, 2002, 22(6): 126-131 |
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| 作者姓名： | 姜根山 安连锁 杨昆 |
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| 作者单位： | 1. 华北电力大学,保定,071003
2. 华北电力大学,北京100085 |
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| 基金项目： | 高等学校博士学科点专项基金项目(20010079004)。 |
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| 摘 要： | 该文从理论上研究了锅炉换热器管道泄漏口声辐射的频谱规律及指向性特征，将泄漏口视作轴向坐标和方位角的可分离辐射源，计算了矩形泄漏源在不同频率下辐射声压级及位相在远场分布规律，指出了声场空间分布与电波频率、管道直径以及泄漏源强度及大小的关系，讨论了检测点布放位置及频率选择对被动式管道泄漏检测定位技术的影响，为锅炉换热器管道的泄漏检测及定位技术提供了理论依据。
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| 关 键 词： | 锅炉 换热器 管道 泄漏口 声辐射 指向性特征 数值计算 |
| 文章编号： | 0258-8013(2002)06-0126-06 |
| 修稿时间： | 2001-11-15 |
NUMERICAL STUDY OF DIRECTIONALITY PATTERNS FOR ACOUSTIC RADIATION FROM A LEAK SOURCE ON A HEAT-EXCHANGER CYLINDER IN BOILERS |
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| JIANG Gen-shan,AN Lian-suo,YANG Kun. NUMERICAL STUDY OF DIRECTIONALITY PATTERNS FOR ACOUSTIC RADIATION FROM A LEAK SOURCE ON A HEAT-EXCHANGER CYLINDER IN BOILERS[J]. Proceedings of the CSEE, 2002, 22(6): 126-131 |
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| Authors: | JIANG Gen-shan AN Lian-suo YANG Kun |
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| Affiliation: | JIANG Gen-shan1,AN Lian-suo1,YANG Kun2 |
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| Abstract: | In this paper, the sound directionality patterns produced by a leak source located on a rigid cylinder of infinite length have been investigated for the case in which the source strength may be represented as a separable function of azimuth angle and axial dimension. It is observed that the patterns of amplitude and phase in the whole far-field space of the leak are dependent of the frequencies of sound waves, circumference of the cylinder, and the strength of the leak source. The results present that the observation points and the frequencies are important to the techniques of the leak trace. It is very useful and can be applied to the technique of acoustic leak detection. |
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| Keywords: | boiler heat-exchanger tube leak detection acoustic radiation directionality |
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