循环流水力特性及模型研究  

Hydrodynamic characteristics and model of circulating flow

作　　者：赵国正[1] 龚丽[1] 张光海[1] 

机构地区：[1]安徽工业大学建筑工程学院,安徽马鞍山243002

出　　处：《供水技术》2010年第6期14-16,共3页Water Technology

摘　　要：通过清水实验对气提升交替循环流复合滤料滤池进行了循环流水力特性及模型的研究。结果表明,空塔气速决定了气提升交替循环流复合滤料滤池内气含率的高低;气含率与循环液速、循环驱动力、氧传质系数成正比,与液体循环时间成反比。根据实验数据分析得出气含率-空塔气速模型和降流区液体流速-空塔气速模型,根据这两个模型选择适当的控制条件,能够为气提升交替循环流工艺应用于不同领域提供一定的理论依据。The hydrodynamic characteristics and model of circulating flow in Airlift Alternant Loop Complex Bio-filter were investigated through clean water experiment.The results showed that gas holdup in the Airlift Alternant Loop Complex Bio-filter was controlled by the superficial velocity.A positive correlation were found between gas holdup and circulating liquid velocity,circulating power and oxygen transfer coeffcient.However,a negative relation was found between gas holdup and liquid circulation time.The models of gas holdup-superficial velocity and downflow area flow rate-superficial velocity were obtained according to the experimental data.Based on these models,the Airlift Alternant Loop technology could be applied in different fields under certain controlled conditions.

关 键 词：循环流 水力特性 气含率 循环液速 

分 类 号：TU991[建筑科学—市政工程]