Bubble Nuclei Measurement via an Inverse Acoustic ScatteringTechnique

通过逆声散射技术测量气泡核

• 批准号: 9160484
• 负责人: Ramani Duraiswami
• 金额: $ 5万
• 依托单位: Dynaflow Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-01-01 至 1992-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9160484&HistoricalAwards=false
• 关键词: Bubble; Nuclei; Measurement; via; Inverse

The sizes and numbers of gas bubbles in water are reflected in the susceptibility to cavitation and in the acoustical properties. Acoustic probing is a simple and robust experimental method for obtaining information about the population of bubbles; however, the conversion of the measured data requires solution of a complex ill-posed inverse problem. This project will incorporate the multi-phase character of the bubbles into the model used for solving problems of this kind. Multi-phase flow and bubble dynamics will be modelled to obtain proper equations for determination of the bubble population; and the resulting ill-posed problems will be solved by regularization. This solid theoretical framework can be used to design instruments for accurate determination of the bubble population.

水中气泡的大小和数量是 反映在对空化的敏感性和 声学性能 声学探测是一种简单而强大的 实验方法，用于获得关于 泡沫的人口;然而，测量的转换 数据需要求解复杂的不适定逆问题。 该项目将结合多阶段的特点， 气泡到用于解决这类问题的模型中。 将对多相流和气泡动力学进行建模， 用于确定气泡数量的适当方程;以及 由此产生的不适定问题将通过以下方式解决 正则化 这个坚实的理论框架可以用来 设计用于精确测定气泡的仪器 人口