机电工程技术2024，Vol.53Issue(4)：129-133,5.DOI:10.3969/j.issn.1009-9492.2024.04.029
液体在横向气流中破碎的动量交换机制
Momentum Exchange Mechanism of Liquid Breaking in Transverse Airflow
摘要
Abstract
The breaking of liquid jets is a complex nonlinear dynamical problem.In order to investigate the momentum exchange mechanism between gas and liquid during the breakup process,numerical simulations are performed by using the Fluent software to simulate the variation of the momentum exchange capacity and the efficiency of momentum exchange during the impact of liquid by different air flows.This law is further validated by the VOF to DPM model.The results show that the efficiency of momentum exchange varies from 62 to 83 percent,flow velocities is from 40 m/s to 90 m/s and flow densities is from 1.177 kg/m3 to 7.356 kg/m3.The momentum exchange between gas and liquid increases with the gas velocity.When the gas density is constant,the momentum exchange efficiency gradually decreases with the gas velocity and eventually becomes stable.When the gas velocity is the same,the momentum exchange efficiency decreases with increasing gas density and eventually becomes stable.When the physical properties of the gas flow are constant,increasing the density and viscosity of the liquid leads to an increase in the efficiency of the gas-liquid momentum exchange.The momentum exchange mechanism is verified by using the particle size distribution of the droplet as a computational index for the liquid fragmentation effect.It is found that the particle size law of the liquid after fragmentation is essentially the same when the gas-liquid momentum exchange is equal,with a maximum error of 15.3 percent.关键词
横向射流/动量交换效率/液体破碎/雾滴粒径/数值模拟Key words
transverse jet/momentum exchange efficiency/liquid breaking/droplet size/numerical simulation分类
信息技术与安全科学引用本文复制引用
刘晓宏,温治,杜宇航,苏福永,张四宗,楼国锋..液体在横向气流中破碎的动量交换机制[J].机电工程技术,2024,53(4):129-133,5.基金项目
河北省重点研发计划(22373805D) （22373805D）
中央高校基本科研业务费专项资金资助项目(FRF-TP-22-077A1) （FRF-TP-22-077A1）
