撞击流反应器内涡特性研究进展

撞击流技术具有良好的混合效果，广泛应用于能源、环保、化工等工程领域。由于撞击流反应器流场内存在大量无序的湍流涡结构，使其具有良好的混合效果。本文基于撞击流的混合原理，详细叙述了撞击流反应器内不同混合尺度下的混合过程以及涡的演变对混合的影响。结合实验和数值模拟等研究结果，阐述了不同类型撞击流反应器和撞击流反应器多相流场涡特性，归纳了撞击流反应器流场涡的特点。论述了撞击流反应器涡的产生和脱落机理。着重对圆柱射流、平板射流和撞击流流场内涡特性的本征正交分解（POD）分析进行总结，利用流场能量的角度揭示涡演化和消散规律。最后，对开发新型撞击流反应器、优化分析方法等研究前景进行展望。

Research progress of vortex characteristics of impinging stream reactor

The impinging stream has been widely used in energy, environmental protection, chemical engineering for the excellent mixing effect due to a large number of disordered turbulent vortices in the flow field of the impinging stream reactor. Based on the mixing principle of impinging stream, the mixing process at different mixing scales and the influence of vortex evolution on mixing in the impinging stream reactor were explained in detail. Combining with experimental and numerical simulation results, the vortex characteristics of different types of impinging stream reactors and the multiphase flow field in impinging stream reactors were expounded. And the characteristics of flow field vortices in impinging stream reactors were summarized. The mechanism of vortex generation and shedding in impinging stream reactor was revealed. The proper orthogonal decomposition (POD) analysis of vortex characteristics in cylindrical jet, impinging jet on flat plate and impinging stream was summarized. The evolution and dissipation of vortices were indicated from the viewpoint of flow field energy. Finally, the prospects for the development of new impinging stream reactors and optimization analysis methods were prospected.