| 摘要: |
| 结合已建典型高拱坝枢纽工程泄洪雾化原型观测、数值模拟及物理模型试验成果，研究高拱坝枢纽部分孔口开启泄洪的雾化规律，探讨通过泄洪调度方式减轻泄洪雾化所带来危害的途径，保证电站枢纽安全、有效运行。结果表明，坝身表、深（中）孔泄洪时雾雨区分布与下游水舌入水流速、水舌入水面积以及入水角度密切相关，其中入水流速对深（中）孔泄洪雾雨区分布的影响更加明显。当库水位和泄量一定时，泄洪洞运行雾化雨强及其影响范围最小，且雾化影响区集中在远离坝体的下游河段，而深（中）孔单独运行雾化雨强及其纵向影响范围明显大于表孔和泄洪洞单独运行工况，雾雨区垂向范围受泄洪调度方式影响较小。分析成果为高拱坝枢纽合理泄洪调度提供了参考依据。 |
| 关键词: 高拱坝、泄洪雾化、表孔、深（中）孔、泄洪洞、调度方式 |
| DOI： |
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| 基金项目:国家重点研发计划（2016YFC0401704）； 国家自然科学基金(U1765202）；中央级公益性科研院所基本科研业务费专项基金（Y11806） |
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| Analysis on the Influence of Flood Discharge Dispatching on Atomization of High Arch Dam Projects |
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YU Kaiwen, HAN Changhai
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Nanjing Hydraulic Research Institute
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| Abstract: |
| Based on the prototype observation, numerical simulation and physical model test results of flood discharge atomization for typical high arch dams, the atomization rules of the partial orifices opening flood discharge in high arch dams are studied, and in order to ensure the safe and effective operation of the power station, the ways are discussed to alleviate the harm caused by the flood discharge atomization through dispatching modes. The results show that the distribution of atomized rain area caused by surface spillways or deep (middle) orifices discharge is closely related to water entry velocity, the area of water tongue and water entry angle, in which the effect of water entry velocity on the distribution of atomized rain area of deep (middle) orifices is more obvious. When the reservoir water and discharge flow are certain, the atomized rainfall intensity and its influence range of the spillway tunnel are smallest, and the atomized influence area is concentrated in the downstream reaching far from the dam body, while the atomized rainfall intensity and its influence range of the deep (middle) orifices is significantly larger than that of surface spillways or spillway tunnel. The analysis results provide a reference for the reasonable discharge dispatching of high arch dam. |
| Key words: high arch dam, discharge atomization, surface spillways, deep (middle) orifices, spillway tunnel, dispatch mode |
