摘要
Spray performance downward the plain orifice injector was numerically simulated by using Fluent. The primary breakup and the secondary breakup were both focused. To capture the instantaneous interface of two-phase flow and multiscale structure of liquid spray more accurately,an adaptive mesh refinement(AMR) method was adopted. Firstly,the velocity distribution and jet structure were obtained. Then,with different coupled VOF(Volume of Fluid)-DPM(Discrete Phase model)strategies,the jet trajectory,the column breakup point,and the time-average SMD distribution were analyzed and compared. Meanwhile,the experimental data and several empirical formulas were applied to verify the numerical value. The results suggested that the numerical simulation could accord well with experimental data and a certain formula.
对航空煤油经直射喷嘴喷入横向射流的雾化过程进行数值研究,采用VOF多相流计算模型、DPM离散相模型和TAB二次雾化模型,应用动态网格自适应技术。采用不同的VOF-DPM耦合方式,模拟了一定韦伯数和动量比下煤油喷入横向气流中雾化过程的射流破碎形态及发展轨迹,获得了雾化后油滴的SMD空间分布和油滴轨迹。与实验结果和经验公式比较后,验证了所采用不同计算方法的合理性。
基金
supported by the National Natural Science Foundation of China(No. 91741118)
