胃型弯头冲蚀磨损数值模拟研究  

Numerical Simulation Study on Erosion and Wear of Gastric Bend

作　　者：翁志福 闫冲冲 吕志鹏[1,2] WENG Zhi-fu;YAN Chong-chong;L Zhi-peng(School of Mechanical Engineering,Yangtze University,Jingzhou 434023,China;Mechanical Structures Strength and Vibration Research Institute,Yangtze University,Jingzhou 434023,China)

机构地区：[1]长江大学机械工程学院,荆州434023 [2]长江大学机械结构强度与振动研究所,荆州434023

出　　处：《科学技术与工程》2025年第4期1450-1457,共8页Science Technology and Engineering

基　　金：国家科技重大专项(2016ZX05038-001-LH002)。

摘　　要：为有效降低普通弯头的冲蚀磨损速率,延长其使用寿命。提出一种胃型弯头,基于气固两相流理论,利用Fluent软件对胃型弯头进行数值模拟并分析流体冲蚀特性。分析结果表明:第二圆形截面位置小于7.5°、大于25.0°小于40.0°时的胃型弯头具有抗冲蚀作用,其中第二圆形截面位置35.0°时的胃型弯头抗冲蚀效果最好,同普通弯头相比抗冲蚀性能提高9.88%。流速由8 m/s增大至28 m/s, 35.0°、37.5°、30.0°、32.5°时的胃型弯头和普通弯头的最大冲蚀速率平均增长26.08倍;颗粒直径由45 mm增大至120 mm,最大冲蚀速率最大增长1.71倍;质量流量由0.02 kg/s增加至0.12 kg/s,最大冲蚀速率最大增长7.35倍。不论流速、颗粒直径、质量流量为何值,35.0°、37.5°、30.0°、32.5°时的胃型弯头最大冲蚀速率始终小于普通弯头最大冲蚀速率,即均具有抗冲蚀作用,其中35.0°时的胃型弯头整体上抗冲蚀效果最好。该弯头可以有效减小冲蚀磨损速率,延长管道使用寿命,同时也可为弯头的抗冲蚀结构设计与优化提供新的设计方案。In order to effectively reduce the erosion and wear rate of ordinary elbows and extend their service life.A stomach-type elbow was proposed,based on the theory of gas-solid two-phase flow,the Fluent software was used on the stomach-type elbow to numerically simulate and analyze fluid erosion characteristics.The analysis results show that the second circular cross-section position less than 7.5°,greater than 25.0°less than 40.0°of the gastric bend has an erosion-resistant effect,in which the second circular cross-section position of 35.0°of the gastric bend erosion-resistant effect is the best,compared with the ordinary elbow erosion-resistant performance increase by 9.88%.The flow rate increases from 8 m/s to 28 m/s,and the maximum erosion rate of the gastric bend and ordinary elbow at 35.0°,37.5°,30.0°and 32.5°increases by 26.08 times on average.The particle diameter increases from 45 mm to 120 mm,and the maximum erosion rate increases by 1.71 times.The mass flow rate increases from 0.02 kg/s to 0.12 kg/s,and the maximum erosion rate increases by 7.35 times.Mass flow rate increases from 0.02 kg/s to 0.12 kg/s,the maximum erosion rate increases by 7.35 times.Regardless of the flow rate,particle diameter,mass flow rate,35.0°,37.5°,30.0°,32.5°of the maximum erosion rate of the gastric bend is always less than the maximum erosion rate of the ordinary elbow,that is,all have the effect of anti-erosion,of which 35.0°of the gastric bend on the whole has the best anti-erosion effect.The elbow can effectively reduce the rate of erosion and wear to extend the service life of the pipeline,but also for the elbow of the anti-erosion structure design and optimization to provide a new design scheme.

关 键 词：气固两相流 胃型弯头 冲蚀磨损 结构优化 抗冲蚀 

分 类 号：TH117.1[机械工程—机械设计及理论]