叠片式过滤器中流道内固-液两相流动特性及基于分形理论的结构优化研究

In view of the unknown flow mechanism of the current laminated filter, the lack of optimization method and the low efficiency of filtration efficiency are studied. Based on different research theories and methods, physical experiment and numerical simulation are carried out from macroscopic and microscopic perspectives.To establish a mesoscopic scale DPIV measurement system, with the help of a digital particle image velocimetry system for laminated flow fractal two-dimensional one test, precision test entity flow detail structure of the fluid flow characteristics.To introduce the theory and method of two phase turbulent flow, the establishment of CFD numerical simulation method, from the angles of macroscopic and microscopic quantitative fluid flow law of flow field inside the fold type filter and migration characteristics of suspended particles.Rich the theory and research method of the solid-liquid two-phase turbulence .According to the characteristics of vortex internal self-similar fractal theory into the optimal design of the laminated flow channel structure, clear internal flow fold type filter the influence law of geometric parameters on its performance, guarantee the filtration performance of filter is put forward the optimization model, forming a new type of filter with independent intellectual property rights.

针对当前叠片过滤器存在的流动机理不明、优化方式缺失、过滤效率不高的制约性难题开展研究。基于不同的研究理论和方法，从宏观与微观的角度开展实体试验与数值模拟。建立介观尺度的DPIV测试系统，借助数字式粒子图像测速系统对叠片分形流道进行二维勿扰试验，精细测试实体流道细部结构中的流体流动特性。引入两相紊流的理论和方法，建立CFD数值模拟方法，从宏观和微观两个角度量化流体在叠片式过滤器内部流场的流动规律和悬浮颗粒的运移特性。丰富固-液两相湍流理论及研究方法。根据水流内部涡流自相似的特点，将分形理论融入叠片流道结构的优化设计中，明晰叠片式过滤器内部流道的几何参数对其性能的影响规律，提出全面提升过滤器的过滤性能的优化模式，形成具有独立知识产权的新型过滤器。

针对当前叠片过滤器存在的流动机理不明、优化方式缺失、过滤效率不高的制约性难题开展研究。基于不同的研究理论和方法，从宏观与微观的角度开展实体试验与数值模拟。建立介观尺度的DPIV测试系统，借助数字式粒子图像测速系统对叠片分形流道进行二维勿扰试验，精细测试实体流道细部结构中的流体流动特性。引入两相紊流的理论和方法，建立CFD数值模拟方法，从宏观和微观两个角度量化流体在叠片式过滤器内部流场的流动规律和悬浮颗粒的运移特性。丰富固-液两相湍流理论及研究方法。根据水流内部涡流自相似的特点，将分形理论融入叠片流道结构的优化设计中，明晰叠片式过滤器内部流道的几何参数对其性能的影响规律，提出全面提升过滤器的过滤性能的优化模式，形成具有独立知识产权的新型过滤器。