真空有压管道过流能力及压降研究
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摘要
为研究真空有压管道安装高度及上下游水位差对管道过流能力和压降的影响,通过改变安装高度和水位差对真空有压管道进行试验,结果表明:安装高度和水位差对管道流量及压降影响很大,安装高度一定时,随着水位差增大,管道过流能力增强,压降增大,且安装高度越大,水位差的变化对管道流量的影响就越明显;水位差一定时,随着安装高度增大,管内掺气浓度增大、压降减小,过流能力减弱,而安装高度在小水位差时对管道流量影响较大。
In order to studythe flow capacity and pressure drop of vacuum pressure pipe,the tests were made through changing the differences of the installation height and water level difference. The results show that the installation height and water level difference have a great influence to the pipe flow rate and pressure drop. When the installation height remains the same,with the increasing of the water level difference,the pipe flow capacity and the pressure drop increases and the greater installation height causes the change of water level difference of the influence of pipeline flow more obvious. When the water level difference keeps on change,the air concentration increases with the increase of installation height.
In order to studythe flow capacity and pressure drop of vacuum pressure pipe,the tests were made through changing the differences of the installation height and water level difference. The results show that the installation height and water level difference have a great influence to the pipe flow rate and pressure drop. When the installation height remains the same,with the increasing of the water level difference,the pipe flow capacity and the pressure drop increases and the greater installation height causes the change of water level difference of the influence of pipeline flow more obvious. When the water level difference keeps on change,the air concentration increases with the increase of installation height.
引文
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[2]朱红耕.虹吸式出水流道内流数值计算与水力设计优化[J],山东理工大学学报(自然科学版),2006,20(1):24-27.
[3]朱红耕.大型泵站虹吸式出水流道水力特性分析[J].中国给水排水,2006,22(6):54-57.
[4]姜俊红,戴红霞.驼峰后带长直管虹吸式出水流道的水力特性试验研究[J].中国农村水利水电,2008(8):130-132.
[5]施俊跃,陈革强,卢健国,等.水库虹吸管的运用特性[J].水利技术监督,2008,16(3):41-43.
[6]高改玉,张根广.虹吸井和排水口泄流三维数值模拟及堰型优化[J].人民黄河,2012,34(3):137-139.
[7]李琳,邱秀云,许史,等.长距离虹吸管道输水水力学模型试验研究[J].南水北调与水利科技,2010,8(3):106-109.
[8]许史,李琳,邱秀云,等.长距离虹吸管输水试验研究初探[J].中国农村水利水电,2010(3):70-72.
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