某电站进水口体型优化水力学试验研究  

Hydraulic experimental study of a hydropower station's inlet shape optimization

作　　者：郭臣[1,2] 朱大勇[1,2] 王列[3] 李利[3] 

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009 [2]安徽土木工程结构与材料省级实验室,安徽合肥230009 [3]长江科学院水力学研究所,湖北武汉430010

出　　处：《合肥工业大学学报（自然科学版）》2013年第3期324-326,364,共4页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然基金资助项目(51078123;51179043)

摘　　要：文章采用1∶30水工模型试验,研究了某电站进水口前流态、漩涡特性、进口段水头损失、沿程时均压力特性及过栅流速等。试验结果表明:在电站正常运行库水位范围内,进水口前未出现影响机组正常运行的有害漩涡,进水口及拦污栅结构体等设计合理;拦污栅结构体至进口渐变段末端的水力损失系数为0.122,在机组引水流量为900m3/s条件下,进口断面的局部水头损失为0.246m;进水口有压管段顶面和侧面的时均压力梯度均较小,检修门井及快速闸门井内的水面波动最大值为0.09m,说明有压进口段的体型较好;拦污栅断面的流速及分布特性随机组运行时库水位的变化而变化,最大过栅流速约为2.1m/s。By using the hydraulic model test to one thirtieth scale,the inlet flow pattern,vortex characteristics,inlet section head loss,time-average pressure characteristics,and gate velocity are studied.The result of the test shows that within the normal water level of the hydropower station,hazardous vortex does not appear in inlet to affect the normal operation,and the design of inlet and trash rack structure is rational.The hydraulic loss coefficient between trash rack structure and the end of the transition section of inlet is 0.122.Under the condition of an unit diversion flow of 900 m3/s,the local head loss of the inlet section is 0.246 m.The time-average pressure gradients of inlet pressing pipe segment on the top surface and along the side are small.The maximum height of water surface fluctuations of the access door well and fast gate well is only 0.09 m.So the shape of pressing inlet section is good.The flow rate and distribution characteristics of trash rack section change with the reservoir water level during the unit operation,and the highest gate velocity is about 2.1 m/s.

关 键 词：进水口 水头损失 拦污栅 流态 水工模型试验 

分 类 号：TV131.61[水利工程—水力学及河流动力学]