The laminar analytic solutions of velocities and pressure in the central zone of the inlet region of pipe flow are given under the condition of uniform inflow, based on the Navier-Stokes equations of incompressible vi...The laminar analytic solutions of velocities and pressure in the central zone of the inlet region of pipe flow are given under the condition of uniform inflow, based on the Navier-Stokes equations of incompressible viscous flow.展开更多
文摘The laminar analytic solutions of velocities and pressure in the central zone of the inlet region of pipe flow are given under the condition of uniform inflow, based on the Navier-Stokes equations of incompressible viscous flow.
文摘针对余吾煤业N1100工作面实行“高抽巷+Y型通风”治理瓦斯模式,应用流体力学模拟软件Comsol对不同进风量下以及高抽巷不同位置下Y型通风工作面采空区流场、瓦斯浓度场的分布进行了模拟研究,研究表明当进风量增大至2328 m^(3)/min时,工作面瓦斯浓度已经降低至安全作业浓度以下;模拟显示“高抽巷+Y型通风”联合采空区埋管对瓦斯治理效果较为明显,结合现场实际考察提出高抽巷最佳垂直位置为40~55 m.
