引用本文:余凯文,韩昌海.高拱坝枢纽工程泄洪调度方式对雾化的影响分析[J].水利水运工程学报,2019,(4):74-82
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高拱坝枢纽工程泄洪调度方式对雾化的影响分析
余凯文, 韩昌海
南京水利科学研究院水文水资源与水利工程科学国家重点实验室,江苏南京
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,分析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。当库水位和泄洪量一定时,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。
关键词:  高拱坝  泄洪雾化  表孔  深(中)孔  泄洪洞  调度方式
DOI:
分类号:TV135
基金项目:国家重点研发计划资助项目(2016YFC0401704); 国家自然科学基金资助项目(U1765202);中央级公益性科研院所基本科研业务费专项基金资助项目(Y11806)
Analysis of influences of flood discharge dispatching modes on atomization by high arch dams
YU Kaiwen, HAN Changhai
State Key Laboratory of Hydrology Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing
Abstract:
Based on the prototype observation data, numerical simulation and physical model test results of atomization caused by the flood discharging of typical high arch dams, we analyze the atomization law of the high arch dams when the flood discharging outlets (tunnels) are partially open, and probe into the ways to minigate the hazards caused by the atomization through flood discharge dispatching, so as to ensure the safe and effective operation of the hydro-power stations. The analysis results show that the distribution of atomized rain area generated by the crest outlets or bottom (mid-level) outlets flood discharging is closely related to the flow inflowing velocity, and the area and angle of the downstream water jet, and the influences of the inflowing velocity on the distribution of the atomized rain area given by the bottom (mid-level) outlets flood discharging are more obvious. When the reservoir water level and discharge amount are constant, the atomized rainfall intensity and its influence range of the flood discharging tunnel operation are the smallest, and the atomization influence area is concentrated in the lower reaches far from the dam body, while the atomized rainfall intensity and its influence range caused by the bottom (mid-level) outlets flood discharge are significantly larger than those of the crest outlet flood discharge or spillway tunnel operation. The analysis results can provide references for the reasonable flood discharge dispatching of high arch dam projects.
Key words:  high arch dam  atomization caused by flood discharging  crest outlet  bottom (mid level) outlets  flood discharging tunnel  dispatching mode
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