高压气幕喷孔风速的数值模拟及应用

Exit Velocity's Numerical Simulation and Field Application of High-Pressure Air Curtain

高压气幕有效地控制掘进工作面的矿尘扩散。应用流体软件FLUENT,对高压气幕喷孔风速的进行了数值模拟。把高压气幕喷孔风速分为风速有效区和风速无效区;喷孔风速随着气体压力的增大而增加;随着气幕喷孔直径增大,喷孔风速呈现增大的趋势,而风速无效区长度也呈现不同程度地增大。模拟结果在现场进行了应用。

High-pressure air curtain effectively controls the mine dust spreading in the drivage workplace.By using fluid software FLUENT,the exit velocity of the high-pressure air curtain generator was simulated.According to the exit velocity,the high-pressure air curtain generator is divided into two parts：effective velocity area and invalid velocity area.As gas pressure increasing,the exit velocity increases.As the spouts diameter increasing,the exit velocity increases and the length of invalid velocity area grows by varying degrees.The simulation result is important to field application of high-pressure air curtain.