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建立了交变电磁场下气液两相流动的数学模型,考察了不同励磁电流参数下行波磁场对循环流量的影响。计算结果表明:电磁力的垂直分量与行波运动方向一致,水平分量呈中心对称。在励磁电流强度为200A,频率为10Hz的条件下,磁场分别单独作用于上升管或下降管时循环流量可提高10%以上,同时作用于上升管和下降管时循环流量可提高20%左右;当吹氩量小于1750L/min时,在上升管处施加磁场的效果优于下降管;当吹氩量大于1750L/min时,二者效果相同。当磁场作用于上升管时,在励磁电流频率为10Hz的条件下,电流强度由100A提高到600A,循环流量可由83t/min增大到129t/min,并且近似成正比例关系;当磁场作用于上升管时,在励磁电流强度为200A的条件下,电流频率由10Hz增大到60Hz,循环流量先增大后减小,在30Hz达到极大值,为91.4t/min。
The mathematical model of gas-liquid two-phase flow under alternating electromagnetic field was established. The influence of down-going magnetic field with different excitation current parameters on the circulating flow was investigated. The calculation results show that the vertical component of electromagnetic force is consistent with the traveling direction of traveling wave, and the horizontal component is centrosymmetric. Under the condition of the excitation current intensity of 200A and frequency of 10Hz, the circulation flow can be increased by more than 10% when the magnetic field acts on the ascending tube or the descending tube separately, and the circulation flow can be increased about 20% when acting on the ascending tube and the descending tube. When the amount of argon blowing is less than 1750L / min, the effect of applying a magnetic field at the riser is better than that of the downcomer. When the amount of argon blown is more than 1750L / min, the effect is the same. When the magnetic field acts on the riser, the current intensity increases from 100A to 600A and the circulating flow rate increases from 83t / min to 129t / min with the exciting current frequency of 10Hz, and it is approximately proportional. When the magnetic field acts on the rising Under the condition of magnetizing current intensity of 200A, the current frequency increased from 10Hz to 60Hz. The circulation flow firstly increased and then decreased, reaching the maximum value of 91.4t / min at 30Hz.