圆形巷道风流分布规律的数学模型表征

The Study of Mathematical Model Characterization of Air Flow Distribution in Circular Roadway

对圆形巷道中风流分布规律进行试验研究,在低、中、高不同风速条件下巷道风速均呈现沿巷道中心线至巷道壁逐渐减小的趋势,且风流在靠近边壁区域受巷道粘滞力的影响,风速变化幅度较大,同时利用曲线拟合的方式对不同风速下风流分布与测点位置关系进一步分析,并依此推导出不同风速条件下方程的一般形式,即用巷道中心最大风速与巷道壁距离关系来表征各点风速的数学模型。

A self-designed experimental system is used to study the air flow distribution in circular simulated roadways in this article.The results show that the air velocity of roadways decreases gradually along the central line of the roadway to the roadway wall under the conditions of low,medium and high wind velocities,and the variation range of the air velocity near the side wall is affected by the viscous force of the roadway.At the same time,we uses curve fitting method to further analyze the relationship between wind distribution and location under different wind speed,and deduces the general form of equation under different wind speed conditions,that is,the mathematical model of expressing the wind speed at each point by the relationship between the maximum wind speed at the center of the roadway and the distance between the roadway wall.