文献类型：期刊文献

中文题名：管流式冲蚀装置异径管固液两相流场数值分析

英文题名：Erosion-Corrosion of Solid-Liquid Phase Flow-Field in Heterodiamter Pipeline:A Simulation and Experimental Study

作者：王坤[1];胡杰珍[1];王贵[1];邓培昌[1];徐敬明[1]

机构：[1]广东海洋大学机械与动力工程学院,湛江524088

年份：2019

卷号：39

期号：9

起止页码：831

中文期刊名：真空科学与技术学报

外文期刊名：Chinese Journal of Vacuum Science and Technology

收录：北大核心2017、Scopus、CSCD_E2019_2020、北大核心、CSCD

基金：国家青年科学基金项目(51801033);广东大学生科技创新培育专项资金(pdjh2019b0231);广东海洋大学创新强校工程科研项目(GDOU2017052601)

语种：中文

中文关键词：异径管;湍流模型;冲蚀;空化;非稳定长度

外文关键词：Different diameter pipe;Turbulence model;Erosion;Cavitation;Unsteady length

中文摘要：为深入研究管流式冲蚀装置异径管内固液两相流场对管壁面的影响,以砂粒为工质,采用Standard k-ε湍流模型、空化模型和冲蚀模型对DN100-DN50异径管进行数值模拟,在流速2、3、4、5 m/s时和温度300、310、320、330 K时,分别获得测试管壁面冲蚀和空化的分布规律。结果表明:测试管的冲蚀速率随着流速的增大而逐渐增大,随温度的升高而轻微变化;在流速为2、3和4 m/s时,测试管的空气体积分数较小近似为零,在流速为5 m/s时,测试管入口处出现空泡现象,其他区域空气体积分数近似为零。测试管的空气体积分数随温度的升高而无明显变化。在不同流速下冲蚀非稳定长度仿真结果与试验结果分别相差1.74%,1.67%,1.48%,1.39%。因此,管流式冲蚀装置的异径管连接方式设计合理,可以忽略空化对测试管的破坏作用,能够确定冲蚀非稳定长度,为后续研究管道冲刷腐蚀行为以及分析测试管腐蚀位置提供理论依据。

外文摘要：The solid-liquid phases(sand and water)flow field,inside a hetero-diameter pipeline,was empirically approximated,mathematically formulated by Standard k-εTurbulence/Cavitation/Erosion models,theoretically analyzed,numerically simulated with Fluent and experimentally evaluated with the lab-built test platform.The influence of the temperature and intake flow velocity on the distributions of erosion/cavitation on pipeline walls was investigated.The simulated results show that the flow velocity has a major and temperature has a minor impact.To be specific,as the flow velocity increases from 2 to 5 m/s,the erosion rate increases,accompanied by weak temperature dependence,and the cavitation starts appearing at 5 m/s only at the input.When it comes to the simulated and measured'unstable erosion lengths',the discrepancy was below 2%.We suggest that the simulated results be of some technological interest in industrial design and applications of solid-liquid slurry flow pipelines.