摘要
基于异重流原理，从紊流状态下的守恒原理出发,导出描述回采工作面风流中瓦斯紊流运移的微分方程，并采用SIMPLE方法求解。通过数值模拟，得到工作面采煤机割煤时瓦斯浓度分布结果。采煤机附近高浓度区瓦斯浓度随风速增加呈幂指数降低，随瓦斯涌出量增加而线性增加。
Based on different heaVy fluid principle and according to the principle of conservation in state ofturbulent flow, differential equation which can describe gas turbulent flow movement in air flow in working faceis derived, and the differential equation is solved by using SIMPLE method. By means of numeric simulation, thegas concentration distribution result while coal mining machine in working face is cutting coal is gotten. Gasconcentration in high concentration zone adjacent to coal mining machine reduce as a rule of power exponent withthe increase of air flow speed, increase as a rule of linearity with the increase of gas effusion quantity.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
1999年第4期337-341,共5页
Journal of Liaoning Technical University (Natural Science)
关键词
回采工作面
数值模拟
瓦斯运移规律
working face
gas
mathematical model
numeric simulation
