| 李福田,刘沛清,许唯临,田忠.高拱坝表孔宽尾墩对泄洪能力影响的试验研究[J].水利学报,2003,34(11):0043-0047 |
| 高拱坝表孔宽尾墩对泄洪能力影响的试验研究 |
| Experimental study on effect of flaring piers on weir discharge capacity in high arch dam |
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| DOI： |
| 中文关键词: 高拱坝 宽尾墩 泄流能力 |
| 英文关键词: high arch dam flaring gate piers discharge capacity |
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| 中文摘要: |
| 为了研究高拱坝采用堰顶宽尾墩收缩射流技术对过流能力的影响，本文在溪洛渡1∶100的整体模型上对不同堰前水头和不同宽尾墩收缩比条件下的流态和泄流量进行了试验研究。结果表明，随着堰前水头和不同宽尾墩收缩比的变化，闸室中会出现自由跌流、急流冲击波、水跃壅水和缓流4种不同的流态，而不同的流态，影响泄流量的因素也不同，定量给出了设计洪水及校核洪水时收缩比对过流能力的影响。 |
| 英文摘要: |
| The effect of flaring gate piers on weir discharge capacity was studied experimentally in the 1∶100 comprehensive model of overflow arch dam in Xiluodu Project which is about 300m high.In the study,the contraction ratio of the flaring gate piers was varied from 0.3 to 0.7,with deflection angle ranging from 11.05°to 21.8°,to investigate the effect on discharge capacity and flow pattern.The result shows that 4 kinds of flow pattern may occur which is dependent on the water head over the weir and the contraction ratio,and the effect on discharge is closely related to the flow pattern. |
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