Paper ID ICLASS06-045 LES WITH STOCHASTIC SIMULATION OF PRIMARY AND SECONDARY AIR-BLAST ATOMIZATION
Paper ID ICLASS06-045 LES WITH STOCHASTIC SIMULATION OF PRIMARY AND SECONDARY AIR-BLAST ATOMIZATION
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论文 ID ICLASS06-045 一次和二次鼓风雾化随机模拟的 LES
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
C. Umr
中科院分区：
文献类型：
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作者：
M. Gorokhovski;J. Jouanguy;C. Umr
本文建立了高韦伯数湍流喷雾中一次和二次空气雾化的随机模型。随机场景基于标度对称下的碎裂假设。为了模拟喷嘴附近液体体积分数的统计，引入了一种特殊的随机粒子，称为“浮动切割器粒子”。在二次雾化和聚结的模拟中，主要的机理是液滴间的碰撞，由此产生的液滴被随机模拟。喷雾模型与湍流中的大涡模拟相耦合，并以喷嘴附近的液体分数为条件。将计算结果与喷雾近场和远场的测量结果进行了比较。
A stochastic model of primary and secondary air-blast atomization in a high Weber number turbulent spray is presented in this paper. The stochastic scenario is based on assumption of the fragmentation under scaling symmetry. The specific stochastic particles, called "floating cutter particles", are introduced in order to simulate the statistics of liquid volume fraction in close-to-injector region. In simulation of secondary atomization and coalescence, the main mechanism is addressed to inter-drop collision, from which the produced droplets are simulated stochastically. The spray model is coupled with LES in turbulent gaseous flow with conditioning on the liquid fraction in vicinity of injector. The results of computation are compared with measurements in near-and-far fields of spray.