阻抗式调压井底部四连通复杂水力耦合研究

Analysis of the Throttled Surge Chamber with Hydro Mechanical Coupling

很多电站采用单管单机共用调压井,特别是三管或者三管以上在调压井底部相汇,其结构特别复杂,水力条件也很复杂。结合漾洱水电站实例,通过4种工况的试验,对调压井在最低涌波情况下的水流流态、压力分布进行了研究,分析了阻抗式调压井底部四连通复杂水力耦合问题。结果表明:调压井底部岔洞布置合理,调压井与引水隧洞、压力钢管连接处水流流态良好,水流稳定、连续,说明采用的连接方式合理可行。

There are many plants with a single stand - alone utility regulator tube wells, especially three or more than three tubes are met at the bottom of the surge shaft. The structure is particularly complex and also the hydraulic conditions are very complex. Taking Yanger Hydro- power Station as an example, the paper studied the flow regime and pressure distribution under the conditions of the lowest surge of the surge shaft and analyzed the issues of complex hydraulic coupling of quadric - series connection at the bottom of impedance surge chamber. The ac- tual operating results show that the layout of surge shaft at the bottom of the fork hole is reasonable, pressure pipe connection flow pattern is good and flow is steady and continuous. Experimental research has been fully validated which shows that described connection use is reasona- bly practicable.