基于低弗氏数水流下折坡渐扩式消力池的优化
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摘要
底流消能中在遇坡度情况下通常采用折坡扩散型消力池,其消能效果较好,对地形适应性强,在同等水利条件下,需要的池深更小,更经济高效。折坡式消力池的优化及应用还存在难题,该体型在低弗氏数水流下的消能与具体工程的应用具有一定研究价值。本工程水流为低弗劳德数水流,通过模型试验,在不同工况下,对折坡扩散式消力池的水深、压强、消能率等水力特性做了研究,针对三种不同体型比较优化,最终得出加深消力池与在护坦加设消能墩的方式,其对下游水深的适应更好。
Bottom flow energy dissipation usually adopt folding diffusion model stilling basin when it come across slope,the energy dissipation effect of which is good and it also has the advantage of strong terrain adaptability,under the same water conservancy condition,the deep pool is smaller comparing to other energy dissipation,thus it is very efficient in terms of economy. However the optimization and application of slope stilling basin is still a remaining issue,the body design in the low Froude flow condition and specific engineering application is of great importance. In this paper,the project of low froude number flow was tested under different conditions,folded slope dispersive stilling basin water depth,pressure and energy dissipation of hydraulic characteristics were optimizaed based on three different sizes,and measures such as deepen stilling basin and adding apron energy dissipation piers in the manner were proposed which is better to the downstream water depth.
Bottom flow energy dissipation usually adopt folding diffusion model stilling basin when it come across slope,the energy dissipation effect of which is good and it also has the advantage of strong terrain adaptability,under the same water conservancy condition,the deep pool is smaller comparing to other energy dissipation,thus it is very efficient in terms of economy. However the optimization and application of slope stilling basin is still a remaining issue,the body design in the low Froude flow condition and specific engineering application is of great importance. In this paper,the project of low froude number flow was tested under different conditions,folded slope dispersive stilling basin water depth,pressure and energy dissipation of hydraulic characteristics were optimizaed based on three different sizes,and measures such as deepen stilling basin and adding apron energy dissipation piers in the manner were proposed which is better to the downstream water depth.
引文
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[2]王海云,戴光清,杨庆,等.低水头大单宽流量泄洪消能方式研究[J].水力发电,2006,32(8):25-26.
[3]江锋,苗隆德,王飞虎,等.低弗氏数T型墩消力池设计及消能研究[J].水利学报,1998(S1):133-138.
[4]王海龙,孙桂凯,徐伟章.低坎分流墩用于低弗氏数水流消能的试验研究[J].红水河,2003,22(2):37-41.
[5]孙保沭,王海龙.低坎分流墩消能工的优化研究[J].水力发电学报,2004,23(3):93-97.
[6]梁砚,周赤,段文刚.折坡扩散型消力池的水跃特性试验研究[J].长江科学院院报,2017,34(3):53-57.
[7]王冰洁,刘韩生.折坡扩散消力池水跃共轭水深计算方法及水跃长度消能率分析[J].水电能源科学,2014,32(8):108-111.
[8]中华人民共和国水利部.水工(常规)模型试验规程:SL 155—2012[S].北京:中国水利水电出版社,2012.
[9]刘莲萍.不同墩形下低水头电站消能效果试验研究[J].水利科技与经济,2015,21(9):95-96.
[10]沈鑫.水电站溢洪道中墩尾部水翅消减方案试验研究[J].水利与建筑工程学报,2015,13(4):201-204.
[11]陈卓英,倪培桐.低水头拦河闸重建工程消能工优化布置试验研究[J].水利与建筑工程学报,2017,15(2):49-54.
[12]李梦成,童海鸿.低弗氏数底流消能辅助消能工模型试验分析[J].人民黄河,2011,33(9):144-146.
[13]花立峰.消力墩—T形墩一消能塘联合消能的试验研究[J].水利水电工程设计,2004,23(1):40-43.
[14]李建中.水力学[M].西安:陕西科学技术出版社,2002:385-388.
[15]李建中,宁利中.高速水力学[M].西安:西北工业大学出版社,1994:67-76.