撞击流内液滴碰撞的后续发展行为

发布时间：2018-03-30 16:55

本文选题：液滴碰撞　切入点：气液两相撞击流　出处：《江苏大学学报(自然科学版)》2016年05期

【摘要】：为了探索撞击流内液滴碰撞后续发展行为,建立了正确反映液滴碰撞及后续发展的冷态理论模型.利用所建模型模拟了同轴对置气液两相撞击流中液滴碰撞导致的融合聚并或二次雾化过程,进而对2个喷嘴之间液滴的粒径分布进行了研究,分析了进口液滴粒径、速度、黏度以及液滴碰撞角度等对撞击流中液滴粒径分布的影响规律.结果表明:进口液滴粒径越小、黏度越大,液滴发生碰撞后聚合的概率越大;进口液滴速度较小时,液滴发生碰撞后全部聚合,继续增大进口液滴的速度,液滴碰撞后二次雾化的概率增大;在相同条件下,液滴发生斜碰时二次雾化的概率比发生正碰时要大.
[Abstract]:To explore the subsequent development of droplet collisions in impinging streams, A theoretical model of cold state which correctly reflects droplet collision and its subsequent development is established. The fusion aggregation or secondary atomization process caused by droplet collision in a coaxial gas-liquid two-phase impinging flow is simulated by using the model. Furthermore, the size distribution of droplets between two nozzles is studied, and the influence of droplet size, velocity, viscosity and impact angle on the particle size distribution in impingement flow is analyzed. The results show that the smaller the size of imported droplet is, The higher the viscosity, the greater the probability of droplet polymerization after collision. When the velocity of imported droplet is small, all droplets will be polymerized after collision, and the velocity of imported droplet will continue to increase, and the probability of secondary atomization after droplet collision will increase; under the same conditions, The probability of secondary atomization is higher when the droplet is in oblique impact than when the positive impact occurs.
【作者单位】：江苏大学能源与动力工程学院;
【基金】：国家自然科学基金资助项目(51306075) 江苏省博士后科研资助计划项目(1302024B) 江苏省自然科学基金资助项目(BK20130520) 江苏省高校自然科学研究面上项目(13KJB470002)
【分类号】：O35

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