水资源与水工程学报2024，Vol.35Issue(1)：109-116,8.DOI:10.11705/j.issn.1672-643X.2024.01.13
某水电站琴键堰体型优化试验研究
Structural optimization of Piano Key Weirs in a hydropower station
摘要
Abstract
The Piano Key Weir(PKW),a novel weir,improves the discharge capacity greatly compared to the linear weir with its prolonged nonlinear overflow edge.To address the problem of insufficient dis-charge capacity of PKW in a proposed hydropower station,the optimized schemes of increasing the length to width ratio L/W,increasing the weir height P and decreasing the number of weir units n as well as in-creasing the weir height P were proposed.Then,physical model tests were conducted to obtain the opti-mal schemes that meet the design requirements.Besides,the influence of hydraulic model types(inclu-ding overall model and cross-section model)and the scale effect of different schemes on the discharge ca-pacity of PKW was investigated.The results demonstrate that the discharge capacity of PKW was im-proved to some extent but yet did not meet the design requirements in scheme M1(L/W increased from 7.75 to 8.88);the discharge capacity increased significantly in both scheme M2(Pincreased from 4.50 m to 6.50 m)and M3(P increased from 4.50 m to 6.90 m and n decreased from 17.5 to 8.5),which met the design requirements.Additionally,the discharge capacity of the cross-section model was slightly higher than that of the overall model by about 6%,and the scale effect could be ignored when the weir head exceeded 2.50 cm in the experiments.关键词
琴键堰/体型优化/泄流能力/展宽比/堰高/比尺效应Key words
Piano Key Weir(PKW)/structural optimization/discharge capacity/length to width ratio/weir height/scale effect分类
建筑与水利引用本文复制引用
王中浩,马飞,林智晟..某水电站琴键堰体型优化试验研究[J].水资源与水工程学报,2024,35(1):109-116,8.基金项目
国家自然科学基金项目(522035811) （522035811）
