Fundamental Research on the Dynamics of Cavitation Clouds by a Water Shock Tube.

水激波管空化云动力学的基础研究。

基本信息

  • 批准号:
    61550127
  • 负责人:
  • 金额:
    $ 1.28万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
  • 财政年份:
    1986
  • 资助国家:
    日本
  • 起止时间:
    1986 至 1987
  • 项目状态:
    已结题

项目摘要

This report describes the dynamics of nonspherical cavitation bubbles in liquids which are the components of cavitation clouds. Mathematical formulations have first been made on the dynamics of two bubbles with initially different radii in an incompressible liquid by taking account of the interaction effect of the bubbles and the deformation. The incompressible theory has been developed to a compressible case. The theoretical results have been compared with an experiment made by a water shock tube. The results can be summarized as follows:1. A test computation has been made on the collapse of a single vapour bubble near a plane rigid boundary to cinfirm the validity of the theory, and has been compared with the result of a fully numerical simulation and also with an experiment by a water shock tube. Comparison among them has been proved to be rather good.2. Interaction between two bubbles with initially different radii has been clarified. It has been found that the initially smaller bubble becomes unstable due to the interaction with the initially larger bubble, and may produce an impulsive pressure higher than that from a single bubble under appropriate conditions.3. Nonlinear oscillation of two spherical gas bubbles has been treated by the present theory. It has been elucidated that one bubble oscillates with period-m when another bubble oscillates with the same period. This suggests that both bubbles can be the source of the same frequency components of cavitation noise.Along the line of the present research project, the dynamics of cavitation clouds will be further developed for the future.
本报告描述了非球形空化气泡的动力学在液体中的空化云的组成部分。本文首次建立了不可压缩液体中两个初始半径不同的气泡的动力学方程,并考虑了气泡与变形的相互作用。将不可压缩理论发展到可压缩情形。理论计算结果与水激波管实验结果进行了比较。主要研究结果如下:1.为了验证理论的正确性,对平面刚性边界附近单个汽泡的溃灭进行了实验计算,并与全数值模拟结果和水激波管实验结果进行了比较。它们之间的比较被证明是相当好的。澄清了两个初始半径不同的气泡之间的相互作用。研究发现,初始较小的气泡由于与初始较大的气泡相互作用而变得不稳定,在适当的条件下可能产生比单个气泡更高的脉冲压力.本文讨论了两个球形气泡的非线性振动。已经阐明,当另一气泡以相同的周期振荡时,一个气泡以周期m振荡。这表明这两个气泡可能是空化噪声的相同频率分量的源。沿着本研究项目的路线,空化云的动力学将在未来得到进一步的发展。

项目成果

期刊论文数量(19)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
高比良裕之,藤川重雄,赤松映明: 日本機械学会関西支部第63期定時総会講演会講演概要集. No.884-2. 196-197 (1988)
Hiroyuki Takahira、Shigeo Fujikawa、Eiaki Akamatsu:日本机械工程师学会关西分会第 63 届年会摘要,第 884-197 号(1988 年)。
  • DOI:
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  • 影响因子:
    0
  • 作者:
  • 通讯作者:
Shigeo Fujikawa and Hiroyuki Takahira: "Dynamics of Two Nonspherical Cavitation Bubbles in Liquids" Fluid Dynamics Research.
Shigeo Fujikawa 和 Hiroyuki Takahira:“液体中两个非球形空化气泡的动力学”流体动力学研究。
  • DOI:
  • 发表时间:
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    0
  • 作者:
  • 通讯作者:
Shigeo Fujikawa: "Dynamics of Cavitation Bubbles -Cavitation Clouds- (in Japanese)" Proceedings of the 62nd Conference of Kansai Branch of the Japan Society of Mechanical Enginerrs. No.874-2. 141-144 (1987)
Shigeo Fujikawa:“空化气泡动力学 - 空化云 -(日语)” 日本机械工程学会关西分会第 62 届会议论文集。
  • DOI:
  • 发表时间:
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  • 影响因子:
    0
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  • 通讯作者:
Hirouyuki Takahira, Shigeo Fujikawa and Teruaki Akamatsu: "Bubble Interaction and Chaos in a Sound Field (in Japanese)" Proceedings of the 6ord Conference of Kansai Branch of the Japan Society of Mechanical Engineers. No.884-2. 196-197 (1988)
Hirouyuki Takahira、Shigeo Fujikawa 和 Teruaki Akamatsu:“声场中的气泡相互作用和混沌(日语)”日本机械工程师学会关西分会第六次会议论文集。
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
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  • 通讯作者:
高比良裕之,藤川重雄,赤松映明, 許斐謙二: 日本機械学会論文集(B). 53. 1901-1907 (1987)
Hiroyuki Takahira、Shigeo Fujikawa、Eiaki Akamatsu、Kenji Konori:日本机械工程师学会会议记录 (B) 53。1901-1907 (1987)。
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  • 影响因子:
    0
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FUJIKAWA Shigeo其他文献

FUJIKAWA Shigeo的其他文献

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{{ truncateString('FUJIKAWA Shigeo', 18)}}的其他基金

Multiscale study on molecular transport process near nonequilibrium vapor-liquid interfaces governed by three physical laws
三个物理定律控制的非平衡气液界面附近分子输运过程的多尺度研究
  • 批准号:
    21246031
  • 财政年份:
    2009
  • 资助金额:
    $ 1.28万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Abstraction of Microscopic Information and Establishment of Boundary Condition on Phase Change by Molecular Dynamics, Molecular Gas Dynamics and Experiment
分子动力学、分子气体动力学及实验对微观信息的提取及相变边界条件的建立
  • 批准号:
    17360074
  • 财政年份:
    2005
  • 资助金额:
    $ 1.28万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Molecular Study of Phase Change Phenomena of Methanol and Water Vapors in Wide Ranges of Vapor-Liquid Non-equilibrium State
宽范围汽液非平衡状态下甲醇和水蒸气相变现象的分子研究
  • 批准号:
    14350087
  • 财政年份:
    2002
  • 资助金额:
    $ 1.28万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
A Study on the Improvement of Submerged Water Jet Performation by the Efficient Use of Cavitation
有效利用空化提高水下射流性能的研究
  • 批准号:
    12555044
  • 财政年份:
    2000
  • 资助金额:
    $ 1.28万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
A Molecular Fluiddynamical Study of Phase Change Phenomena of a Vapor in a Wide Range of Themally Non-equilibrium State
大范围热非平衡状态下蒸气相变现象的分子流体动力学研究
  • 批准号:
    11650184
  • 财政年份:
    1999
  • 资助金额:
    $ 1.28万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Molecular Study on Phase Transition of Fluid by a Shock Tube
激波管流体相变的分子研究
  • 批准号:
    06805018
  • 财政年份:
    1994
  • 资助金额:
    $ 1.28万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
Molecular Study of Phase Transition Phenomena at Vapor-Liquid Interface
汽液界面相变现象的分子研究
  • 批准号:
    04805018
  • 财政年份:
    1992
  • 资助金额:
    $ 1.28万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

相似海外基金

Bubble interaction experiment apparatus
气泡相互作用实验装置
  • 批准号:
    139938-1993
  • 财政年份:
    1992
  • 资助金额:
    $ 1.28万
  • 项目类别:
    Research Tools and Instruments - Category 1 (<$150,000)
Studies on Particle-Bubble Interaction in Relation to Fine Particle Flotation, Award in Indian Currency
与细颗粒​​浮选相关的颗粒-气泡相互作用研究,印度货币奖
  • 批准号:
    8716926
  • 财政年份:
    1987
  • 资助金额:
    $ 1.28万
  • 项目类别:
    Standard Grant
Studies on Particle-Bubble Interaction in Relation to Fine Particle Flotation, Award in U.S. and Indian Currencies
与细颗粒​​浮选相关的颗粒-气泡相互作用研究,美国和印度货币获奖
  • 批准号:
    8704303
  • 财政年份:
    1987
  • 资助金额:
    $ 1.28万
  • 项目类别:
    Standard Grant
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