煤粉颗粒所受Magnus力的数值模拟

NUMERICAL SIMULATION OF MAGNUS LIFT ON A COAL PARTICLE

本文采用数值模拟方法计算了煤粉颗粒所受的Ｍａｇｎｕｓ力，考察了颗粒的旋转速度、流动Ｒｅ数对Ｍａｇｎｕｓ力的影响，并且给出了相应的关系公式．通过比较煤粉颗粒在运动过程中所受到的Ｍａｇｎｕｓ力与气动力的大小，得出：当煤粉颗粒的旋转速度为１８００转／分时，其大小约为气动力的１％，因此在实际的煤粉颗粒受力分析中是完全可以忽略该力的。

Magnus lift on a coal particle has been investigated numerically. An empirical equation has been obtained to describe both effects of the rotational speed and Reynolds number on the lift force on a sphere. It can be found from the comparison between both of drag and Magnus forces, that,as to a coal particle with high rotation speed, such as 1800 r/min, the magnitude of Magnus lift is only 1% of drag force. Therefore, neglecting Magnus force in the calculation of coal particle is really reasonable.