| 空蚀冲击波模式下气泡尺寸在掺气减蚀中的作用 |
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| 引用本文： | 张法星,许唯临,朱雅琴,曾华.空蚀冲击波模式下气泡尺寸在掺气减蚀中的作用[J].水利水电技术,2005,36(10):5-7. |
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| 作者姓名： | 张法星 许唯临 朱雅琴 曾华 |
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| 作者单位： | 1. 四川大学,水力学与山区河流开发保护国家重点实验室,四川,成都,610065
2. 四川省农田水利局,四川,成都,610031 |
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| 基金项目： | 国家自然科学基金（50279022）;国家杰出青年科学基金（50325928）. |
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| 摘 要： | 根据纵波在气液两相流（泡状流）中传播时的衰减规律，从理论上详细探讨了水中单个小气泡、气泡群对压力冲击波衰减所起的作用。结果表明小气泡的尺寸或气泡群的最大概率尺寸是减缓压力波强度的关键因素。给出了减缓已知频率的空化压力冲击波的最有效气泡半径（最大概率半径）的计算公式，对应各种不同的气泡尺寸（最大概率尺寸）压力衰减程度的计算公式。这有助于从微观上深入理解掺气减蚀的机理以及认识掺气减蚀的保护作用。
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| 关 键 词： | 空蚀 气泡 压力波 掺气 减蚀 |
| 文章编号： | 1000-0860(2005)10-0005-03 |
| 收稿时间： | 07 27 2005 12:00AM |
| 修稿时间： | 2005年7月27日 |
Effects of bubble size distribution on aeration for cavitation alleviation under cavitating shock wave |
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| ZHANG Fa-xing,XU Wei-lin,ZHU Ya-qin,ZENG Hua.Effects of bubble size distribution on aeration for cavitation alleviation under cavitating shock wave[J].Water Resources and Hydropower Engineering,2005,36(10):5-7. |
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| Authors: | ZHANG Fa-xing XU Wei-lin ZHU Ya-qin ZENG Hua |
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| Affiliation: | 1. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, Sichuan, China; 2. Sichuan Province Rural Water Resources Bureau, Chengdu 610031, Sichuan, China |
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| Abstract: | In accordance with the attenuation law for the longitudinal wave propagation in the air-liquid two-phase flow(bubble flow),the effects of single micro bubble and bubble group on the attenuation of the pressure shock wave in water are theoretically discussed in detail.The study shows that the size of the micro bubble or the max.probable size of the bubble group is the key factor for alleviation of the shock wave intensity,from which the formula for the calculation of the most effective bubble radius(max.probable radius) for the alleviation of the cavitating shock wave with known frequency and the relevant formula for calculation of the pressure attenuation for various bubble sizes(max.probable size) are obtained,which is helpful to understand both the mechanism and the protective effect of the aeration for the cavitation alleviation microcosmically. |
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| Keywords: | cavitation bubbles pressure wave aeration cavitation alleviation |
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