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三峡电站进水口体型优化试验研究 被引量:2

Experimental study on optimization of intake shape for Three Gorges powerplant
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摘要 三峡电站单孔小进水口水力设计,突破了常规大进水口水力设计的老概念,模型对比试验结果表明:经进一步优化后的单孔小进水口体型单Ⅳ方案,其进水口段的水力损失与美国大古力三厂的基本相当,而引水口前的流态有明显的优越性,该方案较好地满足了三峡工程分期蓄水,初期最低水位135m运行的要求。与原设计的单Ⅰ方案相比,推荐采用的单孔Ⅳ方案的水头损失明显减少,进口段水头损失减少0.284m,全程减少0.301m;与优化后的双孔大进水口Ⅱ方案相比,进口段水头损失减少约0.209m,全程减少约0.182m,而且可节省投资1亿元左右。采用新概念优化电站进水口设计有广泛的实用性,对补充、修改《水电站进水口设计规范》 The hydraulic design of the Three Gorges power stations intake without separating pier breaks through the limitation of old conventional concept of adopting large intakes. The results obtained from comparative hydraulic model tests show that the entrance loss for the optimized scheme Ⅳ of the Three Gorges power stations small intake without separating pier is about the same as that for the intake of the No.3 Grand Coulee power plant, and the flow pattern in front of the intake is obviously much better. The scheme Ⅳ perfectly meets requirements for the Three Gorges power station to operate under the condition of impounding in stages and with the lowest water level of 135 m in the early stage. The head loss for the recommended scheme Ⅳ of the intake without separating pier obviously decreases by 0.284 m in the entrance section, 0.301 m in the whole conduit in comparison with the original design scheme I; and 0.209 m in the entrance section, 0.182 m in the whole conduit in comparison with the optimized scheme Ⅱ of large intake with one separating pier. Adopting the small optimized intake scheme Ⅳ can decrease cost by about 100 million yuan. The new concept can find wide application in optimizing intake design.
出处 《人民长江》 北大核心 1996年第12期1-4,共4页 Yangtze River
关键词 水电站 进水口 水力设计 水头损失 最优设计 Intake of hydropower station Hydraulic design Head loss Optimum design Sanxia Multipurpose Project
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