翼型表面湍流脉动对水滴撞击特性的影响  

Effect of the turbulence fluctuation on droplet impingement of airfoil surface

作　　者：周琳 曹逸韬 郭垠昊 朱鹏飞[2] ZHOU Lin;CAO Yi-tao;GUO Yin-hao;ZHU Peng-fei(AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,China;School of Power and Energy,Northwestern University,Xi’an 710072,China;Air Force Representative Office of Land Decoration in Luoyang,Xinxiang 453000,China)

机构地区：[1]中国航发湖南动力机械研究所,湖南株洲412002 [2]西北工业大学动力与能源学院,西安710072 [3]陆装驻洛阳地区航空军事代表室,河南新乡453000

出　　处：《燃气涡轮试验与研究》2021年第4期49-54,共6页Gas Turbine Experiment and Research

摘　　要：采用欧拉-拉格朗日法和随机轨道模型,分别模拟空气-水滴两相流场以及湍流脉动对水滴的影响。针对NACA23012翼型表面的水滴撞击特性进行了数值模拟,分析了湍流脉动引起水滴撞击特性变化的原因,以及湍流脉动对不同粒径水滴撞击特性的影响。结果表明:湍流脉动使水滴的运动轨迹变得无序,并造成水滴撞击特性在驻点和撞击极限产生明显变化;水滴直径增加时,撞击极限附近以外的区域湍流脉动的影响显著减小;水滴直径采用Langmiur D分布时湍流脉动的影响非常小。The Euler-Lagrangrian method was used to solve air-droplets two phase flow, and stochastic tracking method was employed to simulate turbulence fluctuation effect. Droplets impingement with turbulence fluctuation for NACA23012 was simulated. The variation caused by turbulence fluctuation was analyzed, and the effect of turbulence fluctuation on different diameter droplets was also studied. The results show that the trajectories of droplets is disordered by fluctuation;the variation of droplets impingement is obvious in regions of stagnation and impingement limitation;the effect of fluctuation decreases as the diameter of droplets increases except the area of the stagnation point;when the diameter distribution is Langmiur D, fluctuation has little effect.

关 键 词：湍流脉动 水滴撞击 单向耦合 拉格朗日法 随机轨道模型 数值模拟 

分 类 号：V233[航空宇航科学与技术—航空宇航推进理论与工程]