摘要
应用Fluent软件对离心泵进行清水和含沙水的数值模拟,分析离心泵在输送清水和含沙水时的滑移系数变化.结果表明:滑移系数的变化与扬程有关;泵在输送清水和含沙水时滑移系数差异较大,且滑移系数随流量的增大而迅速减小;含沙水体积分数较小时,滑移系数随粒径的增大而增大,扬程也伴随升高;体积分数增大,滑移系数随着沙粒粒径的增大而减小,随着体积分数的增大而递减剧烈,扬程随之降低.
Numerical simulation of centrifugal pump for fresh and slit-laden water transporting is performed with software Fluent,and the difference of slip factor for the pump between the two water transporting is analyzed.The result shows that the alteration of slip factor would be related to the pumping head and it would be comparatively significant.The slip factor decreases rapidly with the increase of pumping flow,and increases with the increase of particle size when sand volume fraction is small.And the pump head also increases to the accompaniment of the increase of particle size.When the volume fraction is larger,the slip factor would decrease with the increase of particle size of the sand grains and the slip factor would drastically decrease with the increase of volume fraction.Meantime,the hydraulic head would subsequently decreases.
出处
《兰州理工大学学报》
CAS
北大核心
2015年第3期59-63,共5页
Journal of Lanzhou University of Technology
基金
国家科技支撑计划(2013BAF01B02-07)
关键词
离心泵
含沙水
滑移系数
数值模拟
centrifugal pump
slit-laden water
slip factor
numerical simulation
