离心喷嘴雾滴运动轨迹与沉积分布特性

周晴晴; 薛新宇; 杨风波; 秦维彩

doi:10.3969/j.issn.1671-7775.2017.01.004

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江苏大学学报（自然科学版） ›› 2017, Vol. 38 ›› Issue (1) : 18-23. DOI: 10.3969/j.issn.1671-7775.2017.01.004

论文

离心喷嘴雾滴运动轨迹与沉积分布特性

作者信息 +

Trajectory and deposition distribution features of centrifugal atomization nozzle droplet

Author information +

文章历史 +

摘要

针对转盘离心喷嘴雾滴运动方程难以用解析方法求解,以及雾滴群轨迹难以用试验手段追踪的问题.根据雾滴在空气中的受力理论分析,得到雾滴运动的物理方程.采用4阶标准RungeKutta算法,基于Matlab平台进行数值求解,得到了雾滴水平速度、垂直速度的变化曲线及雾滴的运动轨迹.搭建了离心雾化试验台,进行了雾滴沉积分布特性试验.结果表明:在转速为6 000 r·min-1,流量为700 mL·min-1雾化条件下,雾滴水平速度由15.71 m·s-1迅速衰减为0;雾滴垂直速度由0迅速增大到一定速度,雾滴最终沉降速度随雾滴粒径的增大而增加;粒径越大的雾滴水平位移越远;不同粒径的雾滴水平位移的理论值和试验值的相对误差均在5.31％以内,运动模型推导和求解正确.

Abstract

Droplet trajectory of rotary disk centrifugal atomization nozzle is difficult to be solved by analytical method and traced by test means. The droplet movement physical equations were obtained by force analysis and solved by standard fourth order RungeKutta algorithm based on Matlab platform. The horizontal and vertical velocity curves and the droplet trajectories were also obtained. A centrifugal atomization test equipment was established to test the droplet deposition distribution characteristics. The results show that under the atomization conditions with speed of 6 000 r·min-1 and flow rate of 700 mL ·min-1, the droplet horizontal speed rapidly decreases from 15.71 m·s-1 to 0. The droplet vertical velocity rapidly increases from 0 to a certain speed, and the droplet landing velocity and the horizontal displacement are increased with the increasing of droplet size. Compared the theoretical values of horizontal displacement of different diameter droplets with the experimental values, the relative errors are less than 5.31%, which indicates that motion model is derived and solved correctly.

导出引用

周晴晴, 薛新宇, 杨风波, 等. 离心喷嘴雾滴运动轨迹与沉积分布特性[J]. 江苏大学学报（自然科学版）, 2017, 38(1): 18-23 https://doi.org/10.3969/j.issn.1671-7775.2017.01.004

ZHOU Qing-Qing, XUE Xin-Yu, YANG Feng-Bo, et al. Trajectory and deposition distribution features of centrifugal atomization nozzle droplet[J]. Journal of Jiangsu University(Natural Science Edition), 2017, 38(1): 18-23 https://doi.org/10.3969/j.issn.1671-7775.2017.01.004

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