内燃机工程2025，Vol.46Issue(3)：15-26,38,13.DOI:10.13949/j.cnki.nrjgc.2025.03.003
高温高压液氨喷雾宏微观特性试验与仿真
Experiment and Simulation of Macro-Micro Properties of Liquid Ammonia Spray under High Temperatures and High Pressures
摘要
Abstract
The spray characteristics of liquid ammonia under high-temperature(690～1 100 K)and high-pressure(1.0～4.0 MPa)conditions were systematically investigated by combining experiment and numerical simulation,aiming to develop an accurate prediction model for liquid ammonia spray.The experimental analysis employed high-speed shadow-graphy to capture the dynamic spray process,while the numerical simulation based on the Lagrangian-Eulerian coupling approach,focused on key parameters such as velocity fields,Sauter mean diameter(SMD),and probability density function(PDF).The results reveal that increasing ambient pressure weakens the axial spread of the spray while enhancing radial expansion,reducing spray penetration,lowering tip velocity,and increasing the cone angle(with a maximum increase of 86.13%).Higher ambient temperatures significantly promote evaporation and diffusion effects but have limited impact on spray penetration and cone angle.The experiment shows that at 690 K and 1.0 MPa,ammonia undergoes flash boiling,causing significant spray expansion and an increased cone angle.Furthermore,the spray velocity field and droplet distribution exhibit high sensitivity to pressure variations,with SMD decreasing significantly(maximum reduction of 42.83%)and PDF shifting toward smaller droplets,thereby improving atomization performance.The reliability of the developed model for predicting liquid ammonia spray behavior was validated.关键词
氨/喷雾/数值模拟/雾化特性/可视化试验Key words
ammonia/spray/numerical simulation/atomization characteristic/visualization experiment分类
能源与动力引用本文复制引用
张欣怡,侯跃明,曾刚伟,汤成龙..高温高压液氨喷雾宏微观特性试验与仿真[J].内燃机工程,2025,46(3):15-26,38,13.基金项目
国家自然科学基金项目(52236001)National Natural Science Foundation of China(52236001) （52236001）
