摘要
采用非球形颗粒的阻力系数关联式,建立了水滴在绝热逆流空气中的动力学方程,得出了水滴所受阻力及其最终沉降速度的计算方法。在此基础上,分析了水滴变形程度和内部流动对水滴运动特性的影响,结果表明水滴变形程度增加使得水滴受到的空气阻力增大,而最终沉降速度减小,水滴的内部流动导致其受到的空气阻力减小,计算条件下最大偏差可达15%。
In this paper, a water droplet motion model in thermal insulation countercurrent air flow is built based on the non-spherical particle drag coefficient, and the explicit formulation for terminal velocity is derived. On the basis of this model, the influence of water droplet deformation and internal flow on drag force and terminal velocity is studied. It is shown that with the increase of deformation, drag force on water droplet is increasing, but the terminal velocity is decreasing. When considering internal flow of water droplet, the drag force decreases within a maximal deviation of 15%.
出处
《能源工程》
2006年第6期8-12,共5页
Energy Engineering
关键词
阻力系数
最终沉降速度
喷雾
等效直经比
液滴
drag coefficient
terminal velocity
spray
equivalent diameter ratio
water droplet
