CAJ | 학술논문

粉尘在气流中的运动受多种力的作用．将粉尘分为水平和垂直方向运动，研究在这2个方向上在重力及流体拖拽阻力作用下粉尘速度变化规律．研究结果表明，外力作用下，水平方向，在流体拖拽阻力作用下，0．0～0．2 s时间段内，粉尘速度上升很快，基本接近于空气的流速，且粉尘粒径越小，粉尘趋近于风流的速度越快．在垂直方向上，粉尘在重力和阻力作用下具有沉降趋势，粉尘粒径越大，沉降的终速度越大，每一粒径都有对应的沉降终速度，对于5μm的粉尘颗粒它的沉降终速度为0．5 m/s．研究结果为更深层次研究粉尘运动动力学行为提供了理论基础．
분진재기류중적운동수다충력적작용．장분진분위수평화수직방향운동，연구재저2개방향상재중력급류체타예조력작용하분진속도변화규률．연구결과표명，외력작용하，수평방향，재류체타예조력작용하，0．0～0．2 s시간단내，분진속도상승흔쾌，기본접근우공기적류속，차분진립경월소，분진추근우풍류적속도월쾌．재수직방향상，분진재중력화조력작용하구유침강추세，분진립경월대，침강적종속도월대，매일립경도유대응적침강종속도，대우5μm적분진과립타적침강종속도위0．5 m/s．연구결과위경심층차연구분진운동동역학행위제공료이론기출．
The dust subjects to several forces when moving in the airflow.This paper divides the dust movement into horizontal/vertical directions,and studies the dust velocity variation rules in these two directions under the effect of gravity and fluid drag resistance force.Results show that in horizontal direction,under the fluid drag resistance force,during 0.0~0.2 s,the dust approaches to air velocity quickly,nearly the velocity of airflow,and the smaller the dust diameter is,the more quickly the dust is close to the air velocity.In the vertical direction,under the effect of gravity and resistance force,the dust has the tendency of sediment,and the bigger the dust diameter is,the bigger the final sediment velocity is.Each dust size has the corresponding final sediment velocity,and the final sediment velocity is 0.5 m/s for 5μm diameter of dust.The research results have provided theoretic basis for further study of dust transport behavior.