西安理工大学学报2016，Vol.32Issue(1)：12-17,6.DOI:10.19322/j.cnki.issn.1006-4710.2016.01.003
辐流式沉淀池挡板尺寸对温差异重流水力特性影响的三维模拟
3D simulation for the influence of a feed baffle on the density current behaviors caused by temperature in a radial sedimentation tank
摘要
Abstract
In summer or winter,temperature differences between the inflow water and the water in a pool will cause density flow phenomenon,whereby affecting flow pattern and flow speed in a Radial Sedimentation Tank.The Realizable k-εmodel is used to carry out 3D numerical simula-tion of density current evolution regulation under the operational conditions by setting different temperatures between the inflow water and the water in the tank with two different forms of feed baffles near the inlet in summer or winter.The results show that:low-temperature inflow water can produce gravity flow in bottom region in summer while high-temperature inflow water pro-duces the gravity flow in top region in winter;the higher velocity water is in bottom region of sedimentation pond,and counterclockwise vortex is obviously formed in summer,while higher ve-locity water is in top region of sedimentation pond ,clockwise vortex is obviously formed in win-ter.The impact of the longer baffle on the density currents in winter is more obvious,and make velocity field more uniform in the tank.关键词
辐流式沉淀池/温度/异重流/数值模拟Key words
radial sedimentation tank/temperature/density current/numerical simulation分类
建筑与水利引用本文复制引用
魏文礼,白朝伟,刘玉玲..辐流式沉淀池挡板尺寸对温差异重流水力特性影响的三维模拟[J].西安理工大学学报,2016,32(1):12-17,6.基金项目
国家自然科学基金资助项目(51578452,51178391) （51578452,51178391）
陕西省科学研究计划资助项目(2014K15-03-05) （2014K15-03-05）
中央财政支持地方高校发展专项资金特色重点学科资助项目(106-00X101) （106-00X101）
