摘要
分析了激光选区熔化(SLM)技术对制造低阻力、低能耗、高过滤性能过滤器的优势。探索了基于SLM工艺梯度多孔结构过滤器的设计方法,并以此设计规则设计了cross、star和vintiles 3种不同单元体下不同孔隙率(60%、70%、80%和90%)的过滤器。通过XFlow软件对过滤器进行压降–流量模拟仿真分析,同时分析了SLM制造过滤器的成形效果,最后进行压降测试并讨论流体经过不同结构过滤器的压降变化。结果表明,梯度多孔结构设计方法可以通过调节每层的节点数量实现过滤器孔隙大小在径向方向上梯度程度的变化。CFD模拟仿真和压降测试得出cross结构和star结构具有类似的压降表现,压降最低的为vintiles结构。经过喷砂处理后,过滤器压降的实测值与仿真值误差范围为10%~20%,表明CFD仿真技术对过滤器压降情况的预估效果很好,可为过滤器创新结构设计提供优化的方向。
The advantages of selective laser melting(SLM)for manufacturing industrial filters with low resistance,low energy consumption and high filtration performance are analyzed.Explored the design method of gradient porous structure filter based on SLM process,and designed the filtration with different porosity(60%,70%,80%and 90%)under three different units of cross,star and vintiles based on the design rules.Use XFlow software to simulate the pressure drop-flow experiment of the filter,analyze the forming effect of the filter made by SLM,and finally carry out the pressure drop test and discuss the flow of the fluid when the fluid passes through the structure.The results show that the gradient porous structure design method realizes a gradient change in the pore size of the filter in the radial direction,and the gradient can be adjusted by the number of nodes in each layer.The CFD simulation and pressure drop test shows that the cross structure and the star structure have similar pressure drop performance.The vintiles structure has the lowest pressure drop under the same porosity.The post-processed part pressure drop experiment value deviates from the CFD simulation value by 10%–20%.CFD simulation technology can effectively predict the pressure drop of the filter and prompt the optimization direction of structural flow resistance.
作者
王迪
冯永伟
叶光照
杨永强
李阳
NEIL Burns
王家淳
韩昌骏
WANG Di;FENG Yongwei;YE Guangzhao;YANG Yongqiang;LI Yang;NEIL Burns;WANG Jiachun;HAN Changjun(South China University of Technology,Guangzhou 510641,China;Croft Filters Limited,Warrington WA36BL;Guangzhou City University of Technology,Guangzhou 510800,China)
出处
《航空制造技术》
CSCD
北大核心
2022年第14期49-57,共9页
Aeronautical Manufacturing Technology
基金
广东省国际科技合作计划(2017A050501058)。
