基于欧拉-拉格朗日方法的高压喷雾过程数值模型

余磊¹，肖明雅¹，王润涛²，陈江锋³，周涛涛³，唐志全^3*

1.安徽全柴动力股份有限公司，安徽 滁州  239500；2.中国科学技术大学工程科学学院，安徽 合肥  230026；

3.合肥工业大学汽车与交通工程学院，安徽 合肥  230009

摘要：为评估不同湍流模型和液滴破碎模型在高压喷雾雾化过程模拟的准确性，基于欧拉-拉格朗日方法，参照Sandia国家实验室ECN研究组的Spray A正十二烷喷雾试验，开展高压喷雾过程的数值模拟研究。不同湍流模型和液滴破碎模型的仿真结果表明：对高压喷雾雾化过程进行数值仿真时，湍流模型中标准 k-ε 模型和Realizable k-ε 模型的数值模拟结果与试验结果更加接近，其中标准 k-ε 模型能更准确地预测液相贯穿距，Realizable k-ε 模型能更准确地预测气相贯穿距；液滴破碎模型中KH-RT模型与Wave模型的模拟结果与试验结果都比较接近，且KH-RT模型的模拟结果准确性更高。

关键词：高压喷雾雾化过程；湍流模型；液滴破碎模型；数值模拟

Numerical model of high pressure spray process based on Euler-Lagrangian method

YU Lei¹, XIAO Mingya¹, WANG Runtao², CHEN Jiangfeng³, ZHOU Taotao³, TANG Zhiquan^3*

1.Anhui Quanchai Power Co., Ltd., Chuzhou 239500, China;

2. School of Engineering Science,University of Science and Technology of China, Hefei 230026, China;

3. School of Automotive and Transportation Engineering,Hefei University of Technology, Hefei 230009，China

Abstract：In order to evaluate the accuracy of different turbulence models and droplet breakup models in the simulation of high-pressure spray atomization process, based on Euler-Lagrange method and took the Spray A n-dodecane spray experiment of ECN research group of Sandia National Laboratory as a reference,numerical simulation research on high-pressure spray process is carried out. The numerical results obtained by using different turbulence models and droplet breakup models show that the numerical simulation results of the standard k-ε and realizable k-ε models in the turbulence model are closer to the experimental results when the numerical simulation of high-pressure spray atomization process is carried out. The liquid-phase penetration distance can be predicted more accurately by standard k-ε model, while the gas-phase penetration distance can be predicted more accurately by realizable k-ε model. The simulation results of KH-RT model and wave model are close to the experimental results, but the accuracy of the simulation results of KH-RT model is better.

Keywords:high pressure spray atomization process;turbulence model;droplet fragmentation model;numerical simulation