微滴气体流动的一个全面三维的模型被介绍与一个侵犯的盘子在冒泡的粉碎成原子水花学习水花的进化。为煤气的阶段,与 k- 骚乱模型一起的 N-S 方程被解决,考虑双向联合在微滴和煤气的阶段之间的相互作用。当 Lagrangian 实体,为从主要、第二等的决裂的微滴产生的物理的财务,微滴碰撞和结合,微滴动量和热转,驱散的微滴阶段被建模。吝啬的尺寸和在各种各样的 nozzle-to-plate 距离的把分裂成原子的微滴的统计分发是计算的。一些模拟结果与试验性的数据被作比较很好。结果证明侵犯的板的存在在微滴平均数尺寸,尺寸分发和微滴上有显著影响空间分发。air-to-liquid 比率在微滴尺寸和分发上有明显的效果。
Abstract A comprehensive three-dimensional model of droplet-gas flow was presented to study the evolution of spray in the effervescent atomization spray with an impinging plate. For gas phase, the N-S equation with the κ-ε turbulence model was solved, considering two-way coupling interaction between droplets and gas phase. Dispersed droplet phase is modeled as Lagrangian entities, accounting for the physics of droplet generation from primary and secondary breakup, droplet collision and coalescence, droplet momentum and heat transfer. The mean size and sta- tistical distribution of atomized droplets at various nozzle-to-plate distances were calculated. Some simulation resuits were compared well with experimental data. The results show that the existence of the impinging plate has a pronounced influence on the droplet mean size, size distribution and the droplet spatial distribution. The air-to-liquid ratio has obvious effects on the droplet size and distribution.