戽流与挑流联合消能工在狭窄弯道河段水电工程中的应用

摘要

基于甘南某水电站工程实践，针对单纯挑流消能工在狭窄河段应用时，存在易冲刷两岸、冲坑深度大、消能不充分的问题，将该工程中间表孔的挑流消能方式调整为戽流，将两侧表孔、底孔挑流向河中间集中，根据调整后模型试验成果，由于采用了分散消能形式，有效降低了冲坑深度，消能效果良好，这种戽流与挑流联合消能形式，为狭窄弯道段水电工程消能设计提供了新思路。%Based on the practice of one hydropower project and aiming at the application of the single energy dissipation structure with trajec-tory flow in narrow river course, which easily scours banks, causes deep scouring pit and energy is not fully dissipated, the energy dissipation type of the trajectory flow of the middle surface outlet is modified to the bucket flow.The trajectory flows from the surface outlets on both sides and the bottom outlets concentrate to the middle.From the results of the modified model tests, the scouring pit depth is decreased and the energy dissipation effect is excellent after the dispersive energy dissipation type is applied.The joint energy dissipation type of bucket and trajectory flow provides design of the energy dissipation of hydropower project in narrow and curve river course with new concept.