基于Fluent的波纹管流阻性能分析及改进研究

Research on Flowing Resistance of Corrugated Pipe and Improvement Based on Fluent

摘要: 基于流体力学仿真软件Fluent，对城市大管径供热波纹管的内部流场及其改进结构进行了数值模拟，以摩擦因子为表征，研究不同结构参数和工况下波纹管内部阻力的变化。研究表明：相较于光滑管，波纹结构会增强流体的扰动，进而导致更显著的压降；波纹高度对流阻特性影响较为显著。采用正交设计方法对波纹管的主要参数进行组合并对其流阻进行了仿真分析，以探究多个因素耦合作用下波纹管流阻的变化情况。三种因素中，波纹高度对流阻的影响程度最大，而波纹间距影响最小。仿真结果表明，改进后的结构对降低压力损失有一定的帮助，该研究可为城市大管径供热波纹管的设计和优化提供借鉴。

Abstract: Based on the fluid dynamics simulation software Fluent, using the friction factor as a representa-tion, the internal flow field of the Urban heating large diameter corrugated pipes and improved structures were numerically simulated to study the changes of the internal resistance of the corru-gated pipes under different structural parameters and working conditions. The results indicate that the corrugated structure enhances the disturbance of the fluid compared to the smooth tube, re-sulting in more significant pressure drops. The height of the corrugations has a significant effect on the flow resistance characteristics. The orthogonal design method was used to combine the main parameters of the bellows and simulate the flow resistance to explore the change of the flow re-sistance of the bellows under the coupling of multiple factors. Among these factors, the height of the corrugations has the greatest impact on the flow resistance, while the gap between the corrugations has the least impact. The simulation results indicate that the pressure losses are reduced due to the improved structure. This research can provide reference for the design and optimization of large diameter helical finned tubes for urban district heating.