振弦栅收集电焊烟尘特性的数值模拟

为高效、低投入地处理电焊烟尘,得到过滤系统净化电焊烟尘的最佳设计参数,选择ICEM-CFD软件建立栅过滤系统的几何模型并进行网格划分,选用标准(Standard)k-ε模型、离散相模型(DPM),利用FLUENT软件对电焊烟尘过滤效率主要影响的单因素进行模拟计算。研究结论表明,用栅过滤系统过滤电焊烟尘颗粒时,振弦栅的栅丝直径、间距所决定填充率是过滤效率的直接决定因素;栅丝层间距是过滤效率的间接影响因素;通过探究振弦栅对电焊烟尘过滤效率的影响规律,进而为振弦栅的实际应用提供理论基础。

Numerical Simulation of Characteristics of Welding Smoke Collection by Vibrating Wires

In order to process the welding fume with high efficiency and low input,the optimal design parameters of the filter system for purifying the welding fume are obtained.The geometric model of the grid filter system is selected by ICEM-CFD software and meshed.The standard k-εmodel and Discrete Phase Model(DPM)are applied and also FLUENT software is used to simulate the single factor of the main influence of welding fume filtration efficiency.The research results show that,when filtering the welding dust particles with the grid filter system,the filling rate determined by the diameter and spacing of the grid wire of the vibrating wire grid is the direct determinant of the filtration efficiency;the spacing of the wire layer is an indirect factor of the filtration efficiency;by exploring the influence rule of vibrating wire grating on the filtration efficiency of welding fume,it provides a theoretical basis for the practical application of vibrating wire grating.