三峡工程表孔体型空化试验研究  

Cavitation study on surface spillway of Three Gorges Project

作　　者：郭均立[1] 芦俊英[1] 

机构地区：[1]长江科学院水工研究所,湖北武汉430010

出　　处：《长江科学院院报》2000年第4期12-14,26,共4页Journal of Changjiang River Scientific Research Institute

摘　　要：根据三峡工程溢流坝表孔设计体型 ,通过减压试验 ,研究了体型的空化特性。成果表明 :WES曲线坝面为免空蚀体型 ;挑流鼻坎虽有弱空化现象 ,但空蚀的可能性不大 ;工作门槽体现为蒸汽型空化特征 ,其强度随工作水头增大而加剧。对两道门槽进行局部体型修改后 ,两者的空化特性均有明显的改善。要达到完全免除空化之目的 。Based on design type of surface spillway of TGP,the caviation characteristics was studied by means of vacuum tank test,in which detection technques of underwater noise were adopted.The results indicate that the WES profile spillway is cavitation free type,weak cavitation occurs at the end of the bucket lip but possibility of cavitation erosion is negligible,steam cavitation appears in area of the working gate slot and becomes intensive with increasing working head.Local configuration of double gate slots were modified by experiments and the cavitation characteristics were improved clearly.In order to vanish the cavitation completely,further optimization must be made.

关 键 词：空化 溢流坝表孔 试验 三峡工程 

分 类 号：TV131.32[水利工程—水力学及河流动力学]