| 吴鹏飞,白立新,林伟军,王秀明,张海澜.声-流耦合空化场观测与量化表征探索*[J].,2018,37(5):801-810 |
| 声-流耦合空化场观测与量化表征探索* |
| Observation and quantitative characterization of hydrodynamic-acoustic cavitation |
| 投稿时间：2018-06-16 修订日期：2018-08-22 |
| 中文摘要: |
| 本文利用搭建的高速摄影和空化噪声同步观测的声-流耦合空化实验平台，观察分析了声-流耦合场中空化云的演化规律及相应的空化噪声特征；通过引入空化状态变量的概念，给出了空化强度一种新的表述，并提出了一种基于高速摄影图像分析来测量和表征空化状态变量及空化强度的方法。利用该方法进一步对声-流耦合空化时间演化周期性和空间强度分布进行的定量计算，结果表明声-流耦合空化强度和作用范围相比单独声空化和单独水力空化有显著的提升。 |
| 英文摘要: |
| In this paper, bubble clouds in hydrodynamic-acoustic cavitation (HAC) are investigated via an self-built HAC experimental platform with a high-speed camera and a PVDF needle hydrophone. Using this platform, the evolution image and the corresponding noise spectrum of HAC are obtained. Introducing a cavitation state variable, a definition of the cavitation intensity is presented, a method based on high-speed photography image analysis for cavitation characterization is proposed. The periodic characteristics and intensity distributions of hydrodynamic cavitation, acoustic cavitation and HAC are quantitatively analyzed by this method. It is found that the range of HAC is evidently widened and the strength of HAC is significantly enhanced compared with hydrodynamic cavitation or acoustic cavitation. |
| DOI：10.11684/j.issn.1000-310X.2018.05.028 |
| 中文关键词: 声空化，水力空化，空化强度，空化噪声，高速摄影 |
| 英文关键词: Acoustic cavitation, Hydrodynamic cavitation, Cavitation intensity, Cavitation noise, High-speed photograph |
| 基金项目:国家自然科学基金项目 (11674350, 11174315) |
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