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Number density of bubbles under ultrasonic horn measured from stroboscopic images

机译:从频闪图像测量超声喇叭下的气泡数密度

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Although image measurement is essential in the analysis of acoustic cavitation bubbles, it is impossible to determine the position of the bubble along the optical axis of the imaging system from the images. Thus, the number density of the bubbles cannot be measured from the image. This paper proposed a method to determine bubbles' positions along the optical axis using the bubble image brightness. The relationship among the bubble position along the optical axis, the bubble diameter, and the bubble image brightness is clarified using the bubble in the single bubble system. A measurement method of the bubble number density based on this relationship is established. Using this method, the time-averaged spatial distribution of bubble number density under ultrasonic horn is revealed.
机译:尽管在声学空化气泡的分析中,图像测量是必不可少的,但是不可能从图像中沿着成像系统的光轴确定气泡的位置。 因此,不能从图像测量气泡的数量密度。 本文提出了一种使用气泡图像亮度确定沿光轴沿光轴的泡沫位置的方法。 使用单一气泡系统中的气泡阐明了沿光轴,气泡直径和气泡图像亮度的气泡位置之间的关系。 建立了基于这种关系的气泡数密度的测量方法。 利用该方法,揭示了超声喇叭下气泡数密度的时平空间分布。

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