摘要
为推进数值模拟方法在外混式空气雾化喷嘴上的应用,采用Eulerian-Lagrange耦合模型对喷嘴进行建模研究,分析进气压力对喷雾锥角、液滴粒径和流量的影响,以及不同混合段的液滴粒径变化规律。结果表明,随进气压力增大,喷雾锥角扩张增大,液滴索特平均直径减小,液体流量增大,当进气压力达到一定值后,其对锥角和液滴细化的影响程度减弱。利用马尔文激光粒度仪与高速摄影机,对喷嘴雾化特性进行实验验证,数值模拟结果与实验结果吻合,当进气压力为0.4Mpa时,液滴粒径仿真与实验值的相对误差仅为2.63%,验证了用该数值模拟方法对外混式空气雾化喷嘴进行研究的可行性。
In order to promote the application of numerical simulation method in the external mixing air-blast nozzle,Eulerian-Lagrange coupling model was used for the numerical simulation.The influence of inlet pressure on spray cone angle,droplet size and flow rate were analyzed,and the droplet size variation rule in different mixing sections was also analyzed.The results showed that with the increase of inlet pressure,spray cone angle increased,Sauter Mean Diameter(SMD)of the droplet decreased and liquid flow rate increased.When the inlet pressure reached a certain value,the influence on cone angle and droplet refinement was weakened.After that,the atomization characteristics of the nozzle were verified by using Malvern laser particle sizer and high-speed camera,and the numerical simulation was in good agreement with the experiment results.When the inlet pressure was 0.4MPa,the relative error between the simulation and the experimental value was only 2.63%,which verified the feasibility of using the numerical simulation method to study the external mixing air-blast nozzle.
作者
王萍萍
沈凯
张振东
WANG Ping-ping;SHEN Kai;ZHANG Zhen-dong(College of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《软件导刊》
2021年第6期130-135,共6页
Software Guide
关键词
外混式雾化喷嘴
喷雾锥角
SMD
数值模拟
实验验证
external mixing nozzle
spray cone angle
SMD
numerical simulation
experiment research
