含沙水流,sediment-laden flow
1)sediment-laden flow含沙水流
英文短句/例句
1.Progress in the Research of Hydrodynamic Characteristics of Sediment-laden Overland Flow坡面含沙水流水动力学特性研究进展
2.When the axial flow turbine operates in sand loaded rivers, it frequently suffers the sand wear and abrasion.轴流式水轮机在含沙水流中运行时，常遭到泥沙磨损和磨蚀破坏。
3.Numerical Simulation of the Sandy Ablation of Centrifugal Pump Impeller Flowed Passage Parts in High Sandy Flow;含沙水流中离心式水泵过流部件泥沙磨损的数值模拟
4.Study on Key Technical Problems in Modeling of Hyper-Concentrated Flows;高含沙水流模拟的几个关键技术问题研究
5.Abstract: When the axial flow turbine operates in sand-loaded rivers,it frequently suffers the sand wear and abrasion.文摘:轴流式水轮机在含沙水流中运行时，常遭到泥沙磨损和磨蚀破坏。
6.When opration under high sediment flow condition, the turbine is often destroyed by abrasion and erosion of sediment.混流式水轮机在高含沙水流中运行时 ,常遭受泥沙磨损和磨蚀的破坏。
7.Numerical Simulation of Low--Sedimentconcentration Flow Using Mixtur Model of Multiphase Flow;多相流混合模型应用于低含沙水流的数值模拟研究
8.Basing on the theory of similarity, the similarity law of model for homogeneous hyperconcentrated sediment flow in laminar regime in open channel has been studied and the expression of scale for similarity has been derived.本文研究了明渠均质高含沙水流在层流区的模型律,导出了模型相似比尺表达式。
9.FLUME EXPERIMENT ON FORMATION AND DEVELOPMENT OF SANDBODIES IN LAKE WITH SANDBEARING VARIETY OF RIVER含沙河流入湖后沙体形成、发展的水槽实验
10.Selecting Aim Parameters of Francis Turbine About Containing Sand River含沙河流水电站混流式水轮机目标参数选择
11.Study on Turbulent Characteristics and Abrasion Mechanisms of High-velocity Sediment-laden and Aerated Flow;高速含沙掺气水流及磨蚀机理的研究
12.Three-dimensional Performance Prediction of Whole Flow Passage of Francis Turbine Operating in Sandy River含沙河流中混流式水轮机全流道三维性能预测
13.On the Relation between the Velocity and the Concentration Distributions in Open Channel明渠水流垂线流速分布与含沙量分布的关系
14.Study on Soil Detachment Rate and Relationship with Flow Sediment Load with REE Tracing Method坡面土壤剥蚀率及其与水流含沙量的关系研究
15.Including Sand Water Condition Turbine Spiral Case, Stay Vane Flow Field Analysis and Line Improvement含沙水条件下水轮机蜗壳、固定导叶流场分析及型线改良
16.The released flow from reservoirs carries less sediment load of bed material than pre? dam periods.建坝后水库下泄水流挟带的床沙质含沙量减少,坝下游河床出现冲刷。
17.Study of the Information Fusion in Measuring the Sediment in Flow-water by Capacitive Sensor;电容式传感器测量水流泥沙含量信息融合的研究
18.Water filters through the sandy soil and into the well.水漏过沙土后流进井里。
相关短句/例句
silt-laden water flow含沙水流
1.The flow analysis ofsilt-laden water flow in chamber between shrouds of centrifugal impellers;含沙水流在离心叶轮盖板腔体内的运动分析
2.All of these have provide a basis for pump design and prediction of the characteristics of centrifugal pump operated insilt-laden water flow.通过对三个叶轮含沙量从０～８８ｋｇ/ｍ３的大量浑水试验，分析其水力性能曲线的变化规律，讨论了离心泵抽送含沙水流时的扬程、效率和流量之间的变化关系；分析了含沙量对离心泵能量特性的影响。
3)sediment laden flow含沙水流
1.The surface material is liable to abrasion by high velocitysediment laden flow.研究表明 ,含沙水流对固壁材料的磨蚀率随掺气浓度、材料强度的增大而减小 ,随水流流速、含沙量的提高而增
4)silt-laden flow含沙水流
1.Hydraulic characteristics ofsilt-laden flow on different gradient grassplots and its mechanism of sediment retention;不同坡度草地含沙水流水力学特性及其拦沙机理
2.In order to reveal the performance of grass strips onsilt-laden flow with high sediment concentration, the experiments were carried out on different sediment concentration of 0-350 kg/m3 in grassplots on the slope of 3° and 9° and discharge of 20 and 60 L/min, and the deposition of sediment and hydraulic characteristics of runoff were analyzed.通过室内模拟试验,在坡度为3°和9°、流量为20和60L/min条件下研究了不同浓度(0～350kg/m3)含沙水流流经草地的泥沙沉积过程及其水力学特性。
5)hyperconcentrated flows高含沙水流
1.Study of the spatial differentiation ofhyperconcentrated flows frequency in the Loess Plateau;黄土高原区高含沙水流发生频率空间分异及其影响因素
2.Based on the data from Zizhou and Wangjiagou Experimental stations in the coarse sediment-producing area of the middle Yellow River drainage basin, this study deals with characteristics ofhyperconcentrated flows in slope-channel systems in the gullied hilly areas.以黄河中游多沙粗沙区子洲径流站和离石王家沟试验站的径流场观测资料为基础,对黄土高原丘陵沟壑区坡沟系统中高含沙水流特征进行了研究。
3.Semi arid climate, poor vegetation cover and highly erodible loess can be regarded as the main natural factors responsible for the formation ofhyperconcentrated flows in the Loess Plateau, China.黄土高原半干旱的气候条件、稀疏的植被和疏松易蚀的黄土物质，是该地区高含沙水流形成的自然地理因素。
6)hyperconcentrated flow高含沙水流
1.Transfer and dissipation laws of turbulent energy inhyperconcentrated flow;高含沙水流紊动能量转化与耗散规律
2.Thehyperconcentrated flow is an important factor to the high intensity erosion of the high-intensity and coarse sediment producing area of the Loess Plateau.高含沙水流的频繁发生是黄土高原多沙粗沙区产生高强度侵蚀的重要原因。
pared with low concentration sediment flow,hyperconcentrated flow has its specific properties.本文综述了高含沙水流的阻力特征、流速分布、紊动强度分布、能量分布等流动过程中所具有的特性 ,并和清水、低含沙水流作了对比分析。
延伸阅读
高含沙水流含沙量很高、使流动性质发生重大变化的挟沙水流。高含沙水流多发生在土壤强烈侵蚀地区的河流中，如中国黄土地区的黄河干流和支流。山区泥石流、河口、海岸的浮泥运动及管道内水力输送固体颗粒的流动都属于高含沙水流范畴。高含沙水流当含沙量虽大但粒径较粗时常为牛顿流体，流体中任一点上的剪应力与剪切变形速率呈线性函数关系。当含沙量大、且含一定数量粒径较细的泥沙颗粒时，则属于非牛顿流体的范畴，如近似用宾汉体流型来描述，其流变方程为： 式中τ为剪应力；为剪切变形速率(u为流速);τB为宾汉极限应力或屈服应力；η为塑性粘滞系数或刚性系数。τB和η均随含沙量大小而变化，并与细颗粒含量有关。河流中高含沙水流当含沙量不过分高时，常为紊流，但当含沙量很高时，则可能转变为层流。高含沙水流自紊流区进入层流区时的流速和水深较清水为大。高含沙水流作层流运动时,床面以上的ττB范围内流速分布符合抛物线规律,在ττB范围内形成"流核",整体向前运动,τB越大,流核越明显。在低强度紊流运动时也有流核存在。高强度紊流运动时，流速分布符合对数规律。高含沙水流在层流区沿程水头损失系数 λ比在相同流速和水深条件下的清水水流大,在紊流光滑区λ也大于清水水流的值，在紊流粗糙区则相反。因受含沙量影响，泥沙沉速大幅度减少，故高含沙水流具有较大的挟沙能力。当通过较大的高含沙洪水时，可在短期内使河底发生剧烈冲刷，在中国黄河称为揭河底现象；而在水位降落，流速急剧减少时又可能骤然短时停止流动，在黄河称为浆河现象。因此，高含沙水流容易引起河道和水库的淤积,增加防洪和引水的困难,但也可利用其特性进行引洪淤灌及提高水库排沙效率。参考书目钱宁、万兆惠著:《泥沙运动力学》,科学出版社，北京，1983。
