【作者】 马文兵；

【导师】 陈忠基；

【作者基本信息】 辽宁科技大学 ， 机械设计及理论， 2006， 硕士

【摘要】 水力旋流器内固-液两相流场是极其复杂的三维强旋转流流动，这给旋流器的流场数值模拟和实验测量带来了一定的困难。针对旋流器内部的这种复杂两相湍流运动，本文采用了FLUENT软件中的RNG k-ε模型和雷诺应力模型(RSM)，利用贴体网格与分块网格技术，对旋流器内液相流动状态进行了数值模拟，并将模拟结果与实验数据进行分析和比较，结果表明雷诺应力模型(RSM)比RNG k-ε模型更准确地描述了旋流器内部的流动状态。固-液两相流的模拟是在液相流场计算的基础上，采用DPM模型和涉及湍流扩散影响的随机轨道模型，同时在湍流模型中加入了颗粒影响的源项，总结了不同直径的颗粒在不同入口位置进入旋流器后的运动轨迹和颗粒分离效率。 根据数值模拟的结果，分别进行了实验室实验与工业试验。在实验室实验中，分析了入口压力与入口流量的关系，还对旋流器的生产能力、分流比进行了详细的研究，对于确定旋流器的合理工艺参数，解决旋流器分级工艺中的问题，旋流器分级工艺的设计以及对旋流器开展理论研究与新型旋流器的开发等具有重要意义；工业试验是在实验室实验与数值模拟的基础上，在齐大山选矿厂二选车间的1-1#磨矿系统用水力旋流器代替螺旋分级机，采用分散式控制，试验结果表明控制方案的可行性。同时也提出了一些新的改进方案，用现场总线与PLC相结合，完善了控制系统，稳定性和分级效率也提高了很多。更多还原

【Abstract】 The strong swirl turbulent flow in hydrocyclone caused major difficulties in modeling their internal solid-liquid flows. In this thesis, the strongly swirling turbulent flow in solid-liquid hydrocyclone separators is simulated using RNG k-ε models and Reynolds stress equation models (RSM) of FLUENT applications to use the body-fitted and partition meshes. It is demonstrated via comparison between the simulation results with experimental data that the RSM model is superior to the RNG k-ε models. It correctly predicts the Ranking vortex of tangential velocity and the anisotropic behavior of the Reynolds stresses. Certain discrepancy remains between the simulation results and the experiment results, not only caused by the turbulent model, but also by the simplification of the inlet boundary condition and the mesh generation. Modeling solid-liquid interaction flows is complex. Liquid phase transport equations coupled with the solid particles interaction are derived based on the RSM turbulent models to handle the interaction of momentum and kinetic energy of turbulence between the liquid and solid particles,in this thesis DPM models and stochastic trajectory models are adopted, and join the source of particles influence at the base of turbulence models, summarize the movement track and separation efficiency while different diameter particles in different displacement enter the hydrocyclone.According to the numerical simulation results, the lab experiment and industrial experiment are implemented in this thesis. The relation of the inlet pressure and flux is analyzed in the lab experiment, and then the relation curve of production capacity-inlet pressure and separating property-inlet pressure is also protracted. The lab experiment has great value to confirm the advisable technology parameter, solve classification technique and its design, study theory and develop new type of hydrocyclone; On the foundation of the lab experiment and numerical calculative results, in the 1-1# system in the second department of the Qidashan milling factory, to use the hydrocyclone to substitute for the spiral classifier and to adopt the dispersive control, the results indicate the feasibility of the control projects, at the same time some new improved problems are put forward in this thesis, adopt the fieldbus and PLC,and perfect the control system, the更多还原