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中文摘要：
引言 当液体射流存在高速气流作用时，液体射流的破裂与进入静止空气相比有很大不同。这种情况下，高速气流与表面张力、黏度等液体物理性质相比对液体的破裂占主导作用。此射流形式广泛应用在气流式雾化喷嘴中，用于提高雾化的质量。高速气流将动量传递给液体，导致了液体射流的拉伸、摆动及破裂^[1-6]。
英文摘要：
Experiments were performed on the breakup of water droplets in a coaxial twin fluid air-blast atomizer by a high-speed gas stream, With the measurements of Sauter mean diameter （SMD） distributions at a downstream distance of the atomizer, the droplet size was found first to decrease, reaching a minimum, and then to increase monotonically with the downstream distance. Correlation of Lo where the minimum droplet size appeared as a function of aerodynamic Weber number and liquid Reynolds number was analyzed. The growth rate of droplet size passes by Lc downstream increased with increasing water velocity, and the relationship between SMD and x/Dg accurately reflected the increasing trend of droplet size.
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