磁场论文：磁场条件下撞击流反应器内气固两相流场耦合特性的研究.docVIP

磁场论文：磁场条件下撞击流反应器内气固两相流场耦合特性的研究 【中文摘要】本文从理论分析和模拟计算两个方面对磁场强化撞击流技术进行了研究，初步研究了磁场条件下撞击流反应器内气固两相流的流场耦合特性，分析讨论外加磁场对撞击流的强化作用机理，为进一步的实验研究提供可靠的理论依据，也为该技术的深入研究以及推广应用奠定基础。论文首先根据磁性理论、撞击流理论、场协同理论等建立了磁撞击流反应器物理模型。在此基础上，结合流体力学、电磁学理论等分析并建立数学模型，分别建立反应器内各相流体的运动基本方程，并运用欧拉法，以气体作为连续相，磁性固体颗粒作为离散相，考察不同流体质点通过固定的空间点的运动情况，进而了解整个流动空间内的流动情况；并建立起基于该课题研究的具体环境下的动量方程、运动方程和质量守恒方程。对于本课题研究中的紊流建立紊流模型，并应用k-ε方程进行解决。然后，在建立的数学与物理模型基础上，运用Fluent软件进行数值模拟，分析磁场条件下，撞击流反应器内的速度场和浓度场分布。使用gambit按照反应装置的尺寸建立一个三维撞击流模型，并对三维模型进行划分网格、设定边界条件、设定物料性质；在完成几何模型的设置后，将模型导入Fluent软件中，利用Fluent设定多相流的物性参数并同时完成边界条件和初始条件的设定，在选定了计算方法以及相应的守恒方程式后开始进行迭代计算。最后，对比现有的撞击流反应器内各流场的数值模拟结果，对本次模拟计算结果进行了分析和讨论，试图弄清磁场是如何影响撞击流反应器内流场的耦合情况，为进一步改善其流场结构提供了理论依据和基础数据。 【英文摘要】It was researched how the impinging flow technologies are strengthened by theadditional magnetic field technology from the two aspects of theory analysis andsimulation in this thesis. The flow field coupling characteristics of the gas-solidtwo-phase flow was preliminary studied within the impinging flow reactor in thecondition of the magnetic field. Then the reinforcement mechanism of the additionalmagnetic field was analyzed and discussed. On the one hand, the reliable theory basisis obtained from those result, which is good for further experimental study, on theother hand the foundation was laid for the further research and application of thistechnology.The physical model of the magnetic impinging flow reactor was establishedaccording to a series of theories and principles, such as the magnetic theory, theimpinging flow theory, and the field synergy principle. On these bases, themathematical model was set up combined with the relevant theories, including fluidmechanics and electromagnetic theory. Then the fluid motion equations wereestablished respectively. The motion of different fluid particles, which moved throughthe fixed space sport, were investigated with the Euler method, with gas as acontinuous phase and the magnetic solid particles as discrete phase. Then the flowcondition was und