恒定流条件下气垫式调压室室内水位与气压的模拟  

Simulation of water level and air pressure inside the air cushion surge chamber under steady flow condition

作　　者：彭志远[1] 杨建东[1] 郭文成[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,武汉430072

出　　处：《水动力学研究与进展（A辑）》2016年第2期239-244,共6页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金项目(51379158)~~

摘　　要：恒定条件下,气垫式调压室室内气压与水位随机组运行工况变化而变化,该变化不仅取决于上库水位、机组出力等,而且取决于气垫式调压室室内气压设定值。若上库水位变幅较大,气压设定值将直接关系到气垫式调压室运行安全。为此,该文建立了设有气垫式调压室的引水发电系统恒定流数学模型,推导出了室内水位与气压的解析解,分析了上游水位、引用流量、初始设置水位、调压室顶部高程对室内气压与水位的影响,探讨了室内水位变幅与上库水位变幅之间的匹配关系,由此给出了室内水位/气压设定值选取范围,对电站设计和运行具有参考价值。Under the constant condition, the air pressure and water level inside the air cushion surge chamber change with the change of operating condition, the change not only depends on the reservoir water level, the unit output etc, but also depends on the initial air pressure set value inside the air cushioned surge chamber. If the reservoir water level varies greatly, pressure set value will be directly related to the safe operation of air cushion surge chamber. Therefore, in this paper, a mathematical model of a water diversion and power generation constant system with an air cushion surge chamber is established, to analyze the influence of related factors, like reservoir water level, quotative discharge, initial water level set,crest level of the air cushion surge chamber, on water level and air pressure inside the chamber, and discuss the matching relationship between set values of air pressure and the reservoir water levels. Thus the selection range of pressure set value is given, which has instruction significance to the design and operation of power station.

关 键 词：气垫式调压室 恒定流 室内水位/气压设定值 匹配关系 

分 类 号：TV134.2[水利工程—水力学及河流动力学]