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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >A computational fluid dynamics investigation of fluid flow in a dense medium plasma reactor
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A computational fluid dynamics investigation of fluid flow in a dense medium plasma reactor

机译：稠密介质等离子体反应器中流体流动的计算流体动力学研究

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摘要

Computational fluid dynamics are applied to the study of three-dimensional fluid flow in a dense medium plasma reactor ( DMPR) under different operating conditions. Reaction mechanisms and rates for the removal of methyl t-butyl ether ( MTBE) in a DMPR are developed from experimental data to determine the plasma volume, the rate of interphase mass transfer and the photolysis rate of MTBE via UV emission from the plasma. The simulations utilize the plasma volume determined from the kinetic data to show that the volume of fluid in contact with the plasma in the DMPR only constitutes a maximum of approximately 10% of the fluid intended to be cycled through the plasma tubules. The simulations also predict appreciable pressure gradients on the surface of the pin electrodes, resulting in a small discharge area located away from the region in which the electric field strength is a maximum. This result has been confirmed indirectly through observation in that the pin electrodes sputter metal from an area of similar size and location to the low-pressure region predicted by the simulations. The pressure gradients are shown to be a function of operating conditions as well as pin location, indicating that the plasma discharge conditions are not uniform throughout the reactor.
机译：计算流体动力学被用于研究稠密介质等离子体反应器（DMPR）中不同操作条件下的三维流体流动。从实验数据中开发了用于去除DMPR中的甲基叔丁基醚（MTBE）的反应机理和速率，以确定血浆体积，相间传质速率和MTBE通过血浆UV发射的光解速率。该模拟利用从动力学数据确定的血浆体积，表明在DMPR中与血浆接触的流体体积仅最多占打算循环通过血浆小管的流体的大约10％。该模拟还预测了引脚电极表面上的明显压力梯度，从而导致远离电场强度最大区域的较小放电区域。通过观察已间接证实了该结果，即针状电极从与模拟预测的低压区域相似的大小和位置的区域溅射金属。压力梯度显示为操作条件以及销钉位置的函数，表明等离子体放电条件在整个反应器中不均匀。

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