【作者】 陈奕宏； 彭晓星； 周伟新； 史小军；

【Author】 CHEN Ying-hong,PENG Xiao-xing,ZHOU Wei-xin,SHI Xiao-jun (China Ship Scientific Research Center,Wuxi 214082,China)

【机构】 中国船舶科学研究中心；

【摘要】 本文从气泡流中的气泡密度分布与复声速之间的关系式出发,推导得到气泡的密度分布与声速系数以及声衰减系数的方程组。建立的声学测核技术采用带约束条件的最小化方法求解该方程组,得到气泡的密度分布。设计和建立了用于气核声学测量的设备。最后,应用建立的声学测核系统,在大型循环水槽中首次测量了不同空气含量下的气核密度分布,得到了有意义的结果。本文工作为建立一套工程实用的、可靠的声学测核系统奠定了良好的基础。更多还原

【Abstract】 The nuclei population distribution has remarkable influence on the cavitation. Therefore the nuclei population density measurement is fundamental for the nuclei investigation. Applying the minimizing algorithm with some constraints,the equations of sound propagation through a bubbly liquid were solved and the nuclei population density was obtained in this paper. Furthermore,an acoustic test system for measuring nuclei population density was established.And the acquisition and analysis software was developed using graphic language Lab VIEW.Also,the nuclei population density was measured firstly in the Large Cavitation Channel in China Ship Scientific Research Center(CSSRC) and the meaningful results were obtained and presented in this thesis.更多还原