氧气浓度差磁致通风数值模拟

利用超导磁体提供的强梯度磁场，可以驱动具有不同氧气浓度的空气之间产生流动而形成通风。为研究氧气浓度差磁致通风的本质和作用机理，文中对该通风方式进行了理论分析，并就具体的超导磁体系统作用下的圆管内磁致通风进行了数值模拟。结果表明：需通风区与环境空气之间的氧气浓度差越大，超导磁体线圈电流密度越高，氧气浓度差磁致通风的流速就越高，通风效果越好。利用超导磁体驱动具有不同氧气浓度的空气之间产生通风是一种新型通风方式。

NUMERICAL SIMULATION OF MAGNETICALLY INDUCED VENTILATION RESULTED FROM DIFFERENCE OF OXYGEN CONCENTRATION

The air between regions with different oxygen concentrations can be driven to flow by means of the strong magnetic gradient field supplied by a superconducting magnet and the air ventilation is then formed. The theoretical analysis for the magnetically induced air ventilation by a superconducting magnet is presented. The ventilation in a ceramic pipe induced by a room temperature access superconducting magnet system is numerically simulated. The results show that the bigger the oxygen concentration difference between the region required ventilating and the surroundings, the larger the flow rate of the air ventilation. The flow rate of the ventilation also increases with increasing the electric current density of the superconducting magnet coil. The air ventilation induced by a superconducting magnet is a new form of ventilation.