Basic Research On Evaluation Method Of Multiphase Flow Mixed Microbubble Generator Performance

The development history of foam flotation and its industrial application was introduced firstly in this paper. Several advanced flotation devices were mentioned and specified. Based on the research of flotation column technology, the research progress of microbubble generator was systematically introduced.Multiphase flow theory and computational fluid dynamics (CFD) technology, which refer to microbubble generator, was systematically introduced. The principle of air into bubble and the effect of microbubble and particle was studied, and also the basic construction and work mechanism of mixed flow microbubble generator. Based on these researches, this paper presented the evaluation method of microbubble generator.The microbubble generators with different radius of jet were simulated by using CFD software FLUENT. The changing flow fields which were caused by these parameters were analysed based on velocity, kinetic energy,gas phase distribution and the influence on microbubble generator performance.GAMBIT and FLUENT, as the CFD software, was secondarily developed by using VC++, a prevalent development platform. This paper specified the three component modules and their realization processes. Parameterized modeling, related batch operation and optimal simulation about flow area of microbubble generator was studied, which can improve the usage efficiency of CFD softwares. Based on the above research, we established a platform to evaluate the performance of microbubble generator.The selection of this thesis comes from the national natural science funds. The research result has some meanings in development of microbubble generator.