南水北调与水利科技
南水北調與水利科技
남수북조여수리과기
SOUTH-TO-NORTH WATER
2014年
3期
209-213
,共5页
韩守都%张东%ZHANG Dong
韓守都%張東%ZHANG Dong
한수도%장동%ZHANG Dong
旋流竖井%龙抬头%掺气设施%掺气水流
鏇流豎井%龍抬頭%摻氣設施%摻氣水流
선류수정%룡태두%참기설시%참기수류
vortex-shaft%ogee-discharge-tunnel%aeration-facilities%aeration-w-ater-flow
高速水流的水力特性是泄水建筑物体型选择需要关注的重要问题。某水电站深孔泄洪洞由导流洞改建而成,在体型设计过程中设计了竖井旋流型和/龙抬头0型两种布置方式。经水工模型试验比较分析,发现/龙抬头0型的泄洪洞不仅体型结构简单,工程投资省,而且具有水流流态稳定,泄流能力大的特点。高速水流容易引起空化空蚀的问题可以通过优化体型和掺气减蚀措施解决。经综合比较,该水电站最终采用了/龙抬头0型泄洪洞的改建方案。
高速水流的水力特性是洩水建築物體型選擇需要關註的重要問題。某水電站深孔洩洪洞由導流洞改建而成,在體型設計過程中設計瞭豎井鏇流型和/龍抬頭0型兩種佈置方式。經水工模型試驗比較分析,髮現/龍抬頭0型的洩洪洞不僅體型結構簡單,工程投資省,而且具有水流流態穩定,洩流能力大的特點。高速水流容易引起空化空蝕的問題可以通過優化體型和摻氣減蝕措施解決。經綜閤比較,該水電站最終採用瞭/龍抬頭0型洩洪洞的改建方案。
고속수류적수력특성시설수건축물체형선택수요관주적중요문제。모수전참심공설홍동유도류동개건이성,재체형설계과정중설계료수정선류형화/룡태두0형량충포치방식。경수공모형시험비교분석,발현/룡태두0형적설홍동불부체형결구간단,공정투자성,이차구유수류류태은정,설류능력대적특점。고속수류용역인기공화공식적문제가이통과우화체형화참기감식조시해결。경종합비교,해수전참최종채용료/룡태두0형설홍동적개건방안。
The hydraulic characteristic of high2speed flow is a key issue in selection of discharge structures. The deep discharge tunnel of a hydropower station was reconstructed from an existing diversion tunnel. In the design process, two schemes were considered:the vortex shaft discharge tunnel and the ogee discharge tunnel. Through the comparison and analysis of hydraulic modeltests,theogeedischargetunnelshowedmanyadvantages,includingsimplestructures,investmentsaving,stableflow,and high discharge capacity. The cavitation erosion problems caused by the high2speed water flow can be solved using the measures of shape optimization and aeration facilities.After the comprehensive comparison of thetwo schemes, theogee discharge tunnel w as ado pt ed .