| 射流低频高声强发生器设计与实验研究 |
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| 引用本文： | 王健,吴军基,陶钢. 射流低频高声强发生器设计与实验研究[J]. 南京理工大学学报(自然科学版), 2009, 33(3) |
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| 作者姓名： | 王健 吴军基 陶钢 |
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| 作者单位： | 南京理工大学,动力工程学院,江苏,南京,210094 |
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| 基金项目： | 南京理工大学科研发展基金 |
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| 摘 要： | 为解决现有低频高声强发生器声压低、装置复杂、声学性能可调性与重复性差等问题,设计了以压缩空气为能源、电机调谐的低频射流高声强发生器.按照气体动力学一维行波理论、守恒方程、伯努利方程与声学理论对其进行声学设计.按理想可压缩气体定常流流体动力学控制方程模型,采用三维结构化网格、压力耦合方程半隐式算法,计算得到流场的压力分布特性.为验证其声学特性,进行了现场发声测试试验.实验结果与设计值基本一致,验证了该低频高声强发生器具有50 Hz低声频、181dB高声强、声特性重复可调的特点,可以为噪声伤害、高声强声源工业应用及声学武器的研究提供实验基础与声源.
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| 关 键 词： | 声学发生器 射流 低频 高声强 气体动力学 |
Design and Experiment on Fluidic Low-frequency and High-intensity Sound Generator |
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| WANG Jian,WU Jun-ji,TAO Gang. Design and Experiment on Fluidic Low-frequency and High-intensity Sound Generator[J]. Journal of Nanjing University of Science and Technology(Nature Science), 2009, 33(3) |
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| Authors: | WANG Jian WU Jun-ji TAO Gang |
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| Affiliation: | School of Power Engineering;NUST;Nanjing 210094;China |
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| Abstract: | To solve the problems of the fluidic low-frequency and high-intensity sound generator,such as lower sound pressure,more complex equipments,worse acoustic character tune and repetition,a new low-frequency and high-intensity sound generator is designed.The generator is powered by compressed air and adjusted by electromotor.It is acoustically designed by one-dimensional traveling-wave theory of aerodynamics,conservation equations,Bernoulli's equations and acoustic theory.Flow field's pressure distribution char... |
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| Keywords: | acoustic generators fluidics low frequency high intensity sound gas dynamics |
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