引信振动压电发电机气流致声激励特性研究

doi:10.3969/j.issn.1000-1093.2015.04.006

兵工学报 ›› 2015, Vol. 36 ›› Issue (4): 610-618.doi: 10.3969/j.issn.1000-1093.2015.04.006

引信振动压电发电机气流致声激励特性研究

邹华杰¹, 陈荷娟¹, 梁医¹, 姜琦², 刘滨², 王军红²

(1.南京理工大学机械工程学院, 江苏南京 210094；2.西北工业集团有限公司, 陕西西安 710043)

收稿日期:2014-05-08 修回日期:2014-05-08 上线日期:2015-06-02
作者简介:邹华杰(1988—)男博士研究生
基金资助:
总装备部“十二五”预先研究项目（51305070102）；国家自然科学基金项目（51377084）

Study of Drive Characterization of Fuze Vibration Piezoelectric Generator Based on Airflow-induced Sound

ZOU Hua-jie¹, CHEN He-juan¹, LIANG Yi¹, JIANG Qi², LIU Bin², WANG Jun-hong²

(1.School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China;2.Northwest Industries Group Co. Ltd, Xi’an 710043, Shaanxi, China)

Received:2014-05-08 Revised:2014-05-08 Online:2015-06-02

摘要/Abstract

摘要： 为满足引信振动压电发电机的驱动性能要求，解决激励能量关键问题，设计了一个环形喷嘴—共振腔结构的喷注发生器声源。应用计算流体动力学方法，通过仿真模拟解释喷注激发声波致共振腔振动特性；用试验所测的响应电压与仿真获得的共振腔底部声压对比。研究结果表明：共振腔内的声压和轴向质点速度随时间的变化曲线近似于正弦波，相位差为90°，说明了在共振腔内形成了驻波声场；共振腔底部声压幅值和频率较稳定，且幅值较大；压电片的开路响应电压频率与仿真声压频率很接近，从而验证了喷注发生器声源产生纯音的特征。因此，这种根据气流致振原理设计的无活动零件的喷注发生器声源，有利于提高引信振动压电发电机的激励能量。

关键词: 兵器科学与技术, 压电发电机, 喷嘴共振腔, 气流致声, 驻波声场

Abstract: In order to satisfy the drive performance of fuze piezoelectric generator and solve the key problem of excitation energy, an annular nozzle-resonator structure is proposed. CFD method is applied to simulate aerodynamically driven acoustic vibration induced by jet in the resonator. And also, the experiment testing response voltage of piezoelectric transducer is compared with the simulating sound pressure at the bottom of resonator. The results show that the curves of sound pressure and axial velocity varying with time are both similar to sine wave, and their phase difference is approximate 90°, which indicates that a standing wave acoustic field is established inside the resonator. Amplitude and frequency of the simulating sound pressure at the bottom of resonator are much stable and have large amplitude. The frequency of the response voltage is close to that of the simulating sound pressure, which verifies that the jet generator source can produce very stable pure tone. Therefore, the designed jet generator sound source, according to the principle of air flow induced vibration, has non moving components, which is beneficial to improve excitation energy of fuze piezoelectric generator.

Key words: ordnance science and technology, piezoelectric generator, jet-resonator, airflow induced sound, standing wave acoustic field

中图分类号:

TJ430.6

邹华杰, 陈荷娟, 梁医, 姜琦, 刘滨, 王军红. 引信振动压电发电机气流致声激励特性研究[J]. 兵工学报, 2015, 36(4): 610-618.

ZOU Hua-jie, CHEN He-juan, LIANG Yi, JIANG Qi, LIU Bin, WANG Jun-hong. Study of Drive Characterization of Fuze Vibration Piezoelectric Generator Based on Airflow-induced Sound[J]. Acta Armamentarii, 2015, 36(4): 610-618.

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引信振动压电发电机气流致声激励特性研究

Study of Drive Characterization of Fuze Vibration Piezoelectric Generator Based on Airflow-induced Sound

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