受限射流结构参数对通风流场影响的数值模拟

Numerical Simulation Research on the Influence of Restricted Jet Structure Parameters to Ventilation Flow Field

采用流体力学软件对掘进巷道工作面的通风流场进行了模拟研究,分析了风筒出口位置、出口风速、风筒出口距工作面距离和掘进巷道断面宽高比等掘进巷道受限射流结构参数对流场的影响。结果表明:风筒出口位于掘进巷道顶角利于增大射流的有效射程;在相同的风筒出口直径下,风筒出口风速对掘进巷道受限贴附风流中心轴线速度变化的影响不大;在风流有效射程范围内,风筒出口距掘进巷道迎头端面的距离对流场的影响不大;掘进巷道断面宽高比越大,对射流的贴附效应越好。

The fluid dynamics software is adopted to do simulation research on the ventilation flow field of drivage roadway coal face and analyze the influence of restricted jet structure parameters such as the location and wind velocity of air duct export,distance between air duct export and working face,aspect ratio of drivage roadway cross section to ventilation flow field. The research results show that,the air duct export should be located in the apex angle of drivage roadway so as to increase the effective range of jet. The wind velocity of air duct export has little impact on the central axis wind velocity of drivage roadway under the conditions of the same of the air duct diameter. The distance between air duct export between drivage roadway cross section has little impact on ventilation flow field within the effective range. Besides that,the larger aspect ratio of the drivage roadway cross section,the better adhesion effect on the jet.