摘要
以虹吸式坐便器产品中的虹吸管道为研究对象,应用FLUENT软件对虹吸管道冲水过程中的气液两相流进行了三维数值模拟,研究了不同虹吸管道结构对虹吸性能的影响。通过改变管道结构参数(阻水段倾斜角度和爬坡段长度),分别对管道内流场进行对比分析,并依据数值模拟结果提出了虹吸管道结构优化设计的建议。模拟结果表明,虹吸管道结构直接影响虹吸性能,在管道内流场中,管顶驼峰处会产生明显的负压,影响虹吸起始时间;管道出口处均产生正压,且该处气液两相变化变得剧烈;适当缩短爬坡段长度,有利于延长虹吸持续时间;适当增加阻水段倾斜角度,有利于维持虹吸稳定。
In this paper,three different siphon pipelines were imported to the CFD software FLUENT with the gas-liquid two-phase flow field to simulate the flush process and study how the siphon pipeline structures affected the siphon performance.By changing some design parameters of the pipeline structures,including the inclined angle of resistant section and the length of upward section,numerical simulation results were analyzed and some valuable guidelines for optimizing the siphon pipeline structures was proposed.The simulation results indicated that the tip pipelines have an obvious negative pressure in the three types of siphon pipelines which is important to start the siphon phenomena.A positive pressure is generated at the outlet of the pipelines,accompanied with violent gas and liquid phase changes.Properly shortening the length of the upward section may prolong the duration of siphon.Through increase of the inclined angle of resistant section,the stability of the siphon would be more stable.
作者
雷瑶
汪长炜
纪玉霞
LEI Yao;WANG Chang-wei;JI Yu-xia(School of Mechanical Engineering & Automation,Fuzhou University,Fuzhou 350116,China;Collaborative Innovation Center of High-End Equipment Manufacturing,Fuzhou 350116,China)
出处
《计算力学学报》
EI
CAS
CSCD
北大核心
2018年第6期777-781,共5页
Chinese Journal of Computational Mechanics
基金
国家自然科学基金(51505087)
福建省教育厅基金(JA15054)资助项目
关键词
虹吸管道
气液两相流
数值模拟
虹吸性能
优化设计
siphon pipeline
gas-liquid two-phase flow
numerical simulation
siphon performance
optimal design