大石峡水电站进水口叠梁门分层取水试验研究
Model Tests on the Multi-Level Power Intakes of DaShiXia Project
投稿时间:2022-02-26  修订日期:2022-06-28
DOI:
中文关键词:  大石峡水电站  叠梁闸门  分层取水  水力特性  水头损失
英文关键词:DaShiXia Hydropower Station, Stop-Log Gate, Multi-Level Intakes, Hydraulic Characteristics,Water Head Loss
基金项目:国家自然科学基金(51909278)、中国水科院基本科研业务费专项项目(HY110145B0022021)
作者单位邮编
张文远 中国水利水电科学研究院 100038
杨帆 中国水利水电科学研究院 100038
张宏伟 中国水利水电科学研究院 
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中文摘要:
      为分析电站进水口采用叠梁门型式分层取水方案的可行的,本文通过1:21.05的水工模型对大石峡水电站叠梁门分层取水进水口水力特性进行了系统研究。主要研究内容包括对不同叠梁门高度取水时,进水口的水流流态、叠梁门体的压力分布、叠梁门顶及竖向流道的流速分布、进水口段总的水头损失系数等。试验结果表明:电站进水口设置叠粱门后,叠梁门顶水头大于18.0m时不产生有害吸气旋涡,门体压力分布接近静水压力分布;进水口段的水头损失在1.17m-1.30m之间;靠近叠梁门门顶部位的水流流速较大,表层水流流速较小;叠梁门后不同高程竖向流道的水流流速接近于梯形分布,主流偏于进水塔靠下游挡墙侧。在进水口设置叠梁门进行分层取水方案是可行的。
英文摘要:
      In order to analyze the feasibility of application of the stop-log-gate at the water intake ,the hydraulic characteristics of the multi-level intake flow in DaShiXia Hydropower Station was studied based on a 1/21.05 hydraulic model test. In this test, the intake flow pattern, the pressure distribution on the intake gate, the flow velocity above the gate and in the vertical flow passage, as well as the total water head loss through the intake, was studied under normal power generation and water diversion conditions. The tests showed that no harmful suction vortex was detected when the water head over the gate was greater than 18.0m, and the pressure distribution was close to the hydrostatic pressure distribution. When the head loss of the intake section was between 1.17m and 1.30m, the flow velocity near the top of the stop-log-gate was larger, and the surface flow velocity was smaller.. The flow velocity in the vertical channel at different elevations downstream of the stop-log-gate was close to the trapezoid distribution, and the main flow was inclined to the side of the intake tower near the downstream retaining wall. Through the relevant model text,the feasibility of the application of the stop-log-gate at the water intake is verified.
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