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The latest version of an optical, nonintrusive, imaging instrument for measuring drop sizes in sprays is briefly described. The range of drop sizes measurable is 6 to 1200 μm. The use of a laser allows the time exposure to be only 10 ns, which is suitable for fast-moving drops typically found with air-atomizing spray nozzles. References are given for a fuller description of the method and its advantages.
spray, drop sizing, video, imaging systems, computerized data acquisition, nonintrusive measurement techniques
Director of Engineering Research and Development, Parker-Hannifin Corporation, Cleveland, OH