[1]陈厚涛,曹金祥,章汝心,等.强驻波声场中脉动速度特性[J].东南大学学报(自然科学版),2008,38(1):75-80.[doi:10.3969/j.issn.1001-0505.2008.01.015]
 Chen Houtao,Cao Jinxiang,Zhang Ruxin,et al.Study on vibrating velocity in high-intensity standing wave field[J].Journal of Southeast University (Natural Science Edition),2008,38(1):75-80.[doi:10.3969/j.issn.1001-0505.2008.01.015]
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强驻波声场中脉动速度特性()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
38
期数:
2008年第1期
页码:
75-80
栏目:
数学、物理学、力学
出版日期:
2008-01-20

文章信息/Info

Title:
Study on vibrating velocity in high-intensity standing wave field
作者:
陈厚涛 曹金祥 章汝心 沈湘林
东南大学洁净煤发电及燃烧技术教育部重点实验室, 南京 210096
Author(s):
Chen Houtao Cao Jinxiang Zhang Ruxin Shen Xianglin
Key Laboratory of Clean Coal Power Generation and Combustion Technology of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
驻波声场 激光多普勒测速仪 声振动速度 声湍流
Keywords:
standing wave field laser Doppler anemometry acoustic vibrating velocity acoustically induced turbulence
分类号:
O42
DOI:
10.3969/j.issn.1001-0505.2008.01.015
摘要:
利用激光多普勒测速仪对管内空气强驻波声场中脉动速度特性进行了测量.实验结果表明:强声场对流场有很强的调制作用,使流场产生了与声波同频率的周期性脉动,且脉动幅度随着声场强度的增加而增大.管内声场强度不大时,实验值与理论值吻合较好; 声场强度超过160 dB后,出现了声湍流现象,实验测量值与理论计算值之间存在明显的偏差.当管内压力波幅处声场强度达到164 dB时,距离反射板130 mm位置处(sin kx=0.67)湍流脉动速度均方根值为3.50 m/s,达到了该位置处脉动速度幅值的45%,表明强驻波场声湍流脉动非常剧烈.
Abstract:
The vibrating velocity in a high-intensity standing wave tube was measured by laser Doppler anemometry. The results show that the flow field is strongly modulated by intense acoustic field which makes the flow field vacillate with the sound wave synchronously. Moreover, the amplitude of vibrating velocity increases with increasing sound intensity. When sound intensity is not very high, the experimental results are consistent with the theoretical values. However, there is a distinct deviation between measured results and theoretical values when sound pressure level is higher than 160 dB, which indicates that the acoustically induced turbulence appears. When sound pressure level at the sound pressure loop reaches 164 dB, the rms turbulent velocity at the measuring position(sinkx=0.67), 130 mm from the reflecting plate, is 3.50 m/s, which is about 45% of the amplitude of vibrating velocity at the location. It is indicated that the acoustically induced turbulence in a high-intensity standing wave field is drastic.

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备注/Memo

备注/Memo:
作者简介: 陈厚涛(1983—),男,博士生; 沈湘林(联系人),男,教授,博士生导师,xlshen@seu.edu.cn.
基金项目: 国家重点基础研究发展计划(973计划)资助项目(2002CB211600).
引文格式: 陈厚涛,曹金祥,章汝心,等.强驻波声场中脉动速度特性[J].东南大学学报:自然科学版,2008,38(1):75-80.
更新日期/Last Update: 2008-01-20