预测气垫式调压室运行中漏气量的数学模型  

Numerical model for predicting the air losses in the operation process of air-cushioned surge chamber

作　　者：孙冬梅[1,2] 冯平[1] 张明进[2] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]交通部天津水运工程科学研究院水工构造物检测,诊断与加固技术交通行业重点实验室,天津300456

出　　处：《水利学报》2009年第10期1233-1239,共7页Journal of Hydraulic Engineering

基　　金：国家自然科学基金青年科学基金资助项目(50809044);国家自然科学基金资助项目(50579049);天津市应用基础及前沿技术研究计划资助项目(08JCZDZT00100)

摘　　要：针对气垫式调压室运行过程中气压室内的气体沿单裂缝向黏土夹层渗漏的水-气二相渗流过程,建立了基于多相流理论的水-气二相流模型。模拟了不同的围岩孔隙水压力与调压室内气压力比值情况下的气压室漏气情况,结果表明,当该比值增大时,漏气量将迅速减少,验证了设置水幕防漏措施的有效性。所建立的水-气二相流模型可以充分考虑调压室地质条件,水幕的压力,气室气压及围岩性质等因素的影响,为空气损失评估、水幕设计及对漏气严重的调压室进行修补提供了依据。The water-air two-phase flow model based on multi-phase flow theory for describing the leakage of air flowing into the clay interlayer via a fracture in the operation process of air-cushioned surge chamber is established. The amounts of air losses for different ratios of pore water pressure in rock mass to compressed air pressure in surge chamber are calculated. It is found that the air losses decrease quickly when the ratio increases, which indicates that the water curtain for preventing the air leakage is...

关 键 词：气垫式调压室 水-气二相流 水幕防漏 漏气量 

分 类 号：TV732.5[水利工程—水利水电工程]