The Measurement and Instantaneous Display of Bubble-Size Distribution, Using Scattered Light

The need for an instrument that measures the bubble distribution in a flow is well documented by the numerous studies that are conducted on cavitation inception and cavitation damage to materials. The present measurement techniques do not provide a complete solution to these problems. In this short paper, we have developed an instrument that determines the bubble-size distribution by measuring the intensity of light scattered from the bubbles. Bubbles in the range of 0.005 to 0.04 in in diameter were measured with this method. The lower limit of this range can be extended by decreasing the factors that contribute noise to the measurement.