摘要
用摄像机研究了颗粒在流场中的运动轨迹以获取其运动参数,分析了不同实验段不同流场转速和颗粒直径下颗粒运动速度和加速度的变化规律.结果表明,颗粒在旋转流场中的运动可分为发展阶段和稳定阶段,稳定状态下的颗粒作周向运动时运动轨迹类似于椭圆;随转速增加,颗粒速度和加速度增大且呈周期性变化,周期性幅值逐渐增大;随颗粒直径增大,颗粒运动速度和加速度减小,颗粒趋于壁面时处于静止状态.
The camera was used to study the trajectories of particle in the rotational flow field to obtain the motion parameters. The variation law of velocity and acceleration of particles with different experimental section speeds and particle diameters was analyzed. The results showed that the motion of particle in the rotational flow field can be divided into the development stage and the steady stage. The movement trajectory was similar to a ellipse, when the particle circularly moved in the steady stage. With the increase of the rotational speed, the particle velocity and acceleration increased and showed a cyclic variation, and the periodic amplitude of the particle velocity and acceleration is gradually increased. With the increase of particle diameter, the particle velocity and acceleration reduced, and the particle tended to be stationary when the particle was near the wall.
作者
刘艳军
王恺钊
赖科
李杰
Yanjun LIU;Kaizhao WANG;Ke LAI;Jie LI(College of Mechatronic Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China)
出处
《过程工程学报》
CAS
CSCD
北大核心
2018年第2期294-300,共7页
The Chinese Journal of Process Engineering
基金
国家重点研发计划资助项目(编号:2016YFC0304008)
关键词
颗粒
旋转流场
运动特性
周向运动
周期性变化
particle
rotational flow field
motion characteristics
circular motion
cyclic variation
