排灌机械工程学报2013，Vol.31Issue(4)：352-357,6.DOI:10.3969/j.issn.1674-8530.2013.04.015
平直管段不同宽度动边界环隙流场特性
Characteristics of annulus moving boundary flow in straight pipe segments of different widths
摘要
Abstract
To further explore the influence of different factors on the hydraulic characteristics of the moving boundary annulus flow,through tests and theoretical analyses,annuluses with widths of 25,20,15,10 mm respectively were studied.The test was carried out in the straight pipe segment of the pipeline system,whose control volume is 60 m3/h,using barreled feed pipe carriage weighted 750 g.The research shows that the moving boundary annulus flow in straight pipe segment is turbulent morphology.Pressure values of measurement points in the annulus cross section tend to cluster as the width of the annulus increases.In the same section,pressure around the moving boundary of carriage is lower and pressure around the fixed pipe wall is higher.With the same width,the axial velocity sectional distribution is more uniform in the middle section than in the back or front.And the distribution is a layered one around the carriage body of which higher around the dynamic boundary and lower around the fixed border.When the width is 20mm,the axial distribution uniformity is best.Circumferential velocity shows uneven distribution in sections along the carriage under various conditions of different annulus widths.关键词
环隙流场/动边界/宽度/压力/速度Key words
annulus flow filed / moving boundary / width / pressure / velocity分类
农业科技引用本文复制引用
张雪兰,孙西欢,李永业..平直管段不同宽度动边界环隙流场特性[J].排灌机械工程学报,2013,31(4):352-357,6.基金项目
国家自然科学基金资助项目(51179116,51109155) （51179116,51109155）
