Research progress of mixing time in jet mixing equipment

This paper introduced the experimental researches on mixing time of jet mixers,overviewed the applications of CFD technologies in the evaluation of mixing efficiency and flow field structure,and summarized the correlations for mixing time proposed by different researchers.By analyzing the effect of parameters on jet mixing efficiency,it was found that mixing time increased with the increasing of tank diameter and was proportional to the height of tank.The increasing of jet velocity can effectively reduce the mixing time.The optimum diameter and shape of jet nozzles were decided by the concrete structures of jet mixers,but the optimum position of jet nozzle depended on the height-to-diameter ratio of tank.Multiple opposed jets can improve the mixing efficiency obviously.This research indicated that the research and development process of jet mixing enhancement mechanism and novel jet mixing reactor can effectively promoted by combining CFD methods with experimental methods such as pressure fluctuation signal(PFS),PIV and PLIF technology.