旋流器内空气柱形成与发展及其对分离的影响

空气柱是固一液型旋流器流场中的一种特有现象,它对旋流器的分离性能有重要影响.采用流体体积函数模型模拟了空气柱的形成与发展过程,探讨了空气柱形成和发展的机理,分析了空气柱对旋流器溢流比、流场湍流结构、能耗的影响,并采用随机轨道模型分析了空气柱与分级效率的之间的关系.结果表明,空气柱导致旋流器溢流比、湍流强度及能耗增大,分级效率降低.为了降低能耗、提高分离效率应尽可能减小或消除空气柱.

Generation and Development of Air-core in Hydrocyclone and its Effect on Separation Performance

Air-core,as one of characteristics of flow field,has remarkable influence on separation performance of hydrocyclone.The process and mechanism of air-core generation and development were studied using Volume of Fluid Model.The effect of air-core on flow split,turbulent structure of flow field,energy consumption was studied.Furthermore,the effect of air-core on classification efficiency was also investigated by Stochastic Particle Tracking Model.The results indicate that air-core results in the increase of sp...