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虹吸管道内流场数值模拟研究及分析
Study on numerical simulation of the inner flow-field in different siphon pipelines
投稿时间:2017-09-14  修订日期:2017-10-25
DOI:
中文关键词:  虹吸管道  气液两相流  数值模拟  虹吸性能  优化设计
英文关键词:siphon pipeline  gas-liquid two-phase flow  numerical simulation  siphon performance  optimal design
基金项目:国家自然科学基金(51505087);福建省教育厅基金(JA15054)资助项目.
作者单位E-mail
雷瑶 福州大学 yaolei@fzu.edu.cn 
汪长炜 福州大学  
纪玉霞 福州大学  
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中文摘要:
      本文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,包括改变阻水段倾斜角度,改变爬坡段长度,分别对管道进行对比分析,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,有利于维持虹吸的稳定。
英文摘要:
      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 that how the siphon pipeline structures affected the siphon performance. By changing some design parameters of pipeline structure, including the inclined angle of resistant section and the length of upward section, numerical simulation results were analyzed and some valuable advice for optimizing the siphon pipeline structures was proposed. The simulated results indicated that the tip pipelines have obvious negative pressure in the three types of siphon pipeline which is important to start the siphon phenomena. The positive pressure is generated at the outlet of the pipeline, accompanied with gas and liquid phase changes violently. It may properly shorten the length of upward section to prolong the duration of siphon. Through increase the inclined angle of resistant section, the stability of the siphon would be more stable.
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