三峡船闸输水系统正向弧形阀门布置及其特性研究

Study on Characteristics of Normally Positioned tainter Valve for Three Gorges Projects(TGP) Lock

针对三峡船闸中间级阀门初始淹没水深较大的特点，研究了输水系统采用正向弧形门布置的可行性。通过对门区流态、门井水位、门后水流空化特性及阀门启闭力等的试验观测研究，得出三峡船闸中间级输水弧形阀门采用正向布置是可行的，且与反弧门布置相比，有其独特的优点。

The sufficient submergence of the TGPs middle stage lock culvert makes it possible to use tainter valves in their normal position. This paper deals with the characteristics of the tainter valve in the normal position in the operation condition of the TGPs middle stage locks by experiment. Based on the research results obtained from the observations of flow pattern in the valve region, well water level variation, cavitation characteristics of flow behind the valve, lifting and downpull loads and their fluctuations during the valve operating, it could be concluded that this kind tainter values are feasible for the TGPs middle stage locks and there still exist some special advantages in comparison with the reverse tainter valves.