水力的

basic flow patterns in 3 types of suction boxes are studied respectively by both numerical calculation and model test, and the essential hydraulic indexes are listed. the boxes, including elbow inlet, bell-like inlet and dustpan-like inlet, are usually applied for vertical pump of low head.

采用数值计算和模型试验的方法分别研究了低扬程立式泵装置常用的肘形钟形和簸箕形等三种形式进水流道的基本流态，给出了表达这三种形式进水流道水力性能的主要指标。

Using Latin square test, the effect of geometrical parameters on the characteristics of non-overload sewage pump was studied, and the effecting principle of geometrical parameters on efficiency, maximum brake horsepower and its location were researched, the major and minor factors affecting these performance were found out by way of variance analysis, the correction of equation on maximum brake horsepower and its location were also tested.

用正交试验法研究了各几何参数对无过载排污泵性能的影响，探索了各几何参数对效率、最大轴功率值及其位置的影响规律，并通过方差分析找到了影响这些性能的主要因素和次要因素，验证了无过载排污泵最大轴功率值及其位置公式的正确性，根据试验结果对模型泵提出了进一步设计方案，本试验结果对无过载排污泵水力设计有一定的参考价值。

7 A porous medium has a permeability of one darcy when a single phase fluid of one centipoise viscosity that completely fills the voids of the medium, will flow through it under conditions of viscous flow at a rate of one cubic centimeter per second per square centimeter cross sectional area under a pressure or equivalent hydraulic gradient of one atmosphere per centimeter.

答案：当粘度为 1 厘泊的单相流体被完全充满-多孔介质的孔隙时，在粘滞性流体以 1 立方厘米每秒或每平方厘米的相当于每厘米一个大气压的水力梯度通过时，该介质的渗透率为 1 达西。

The experiment individually focused on the velocity distribution of concentration ellipse shape represented in oxidation ditches existed in sewage treatment plants, and confirmed the rationality of aeration and the submersed flow driver power designed.

该试验在实际污水处理厂进行，对采用同心椭圆型沟道的Orbal氧化沟的流速分布进行了的测定，重点研究了Orbal氧化沟的水力流态特征，验证了曝气及水下推动设备功率配置的合理性。

The survey of similar Orbal oxidation ditch is focused on the velocity distribution of concentration ellipse shape and concentric circles shape represented in oxidation ditches, analyzes the rationality of its device allocation and the problems shown in velocity profile, proposes the improved treatment.

现场同类Orbal 氧化沟流场的实测研究了椭圆形和圆形两种Orbal 氧化沟的水力现象，分析其设备配置的合理性，针对流速分布中出现的问题进行分析并提出了改进的措施。

The survey for similar Orbal oxidation ditch was performed on-the-spot for safety of engineering design. The experiment individually focused on the velocity distribution of concentration ellipse shape represented in oxidation ditches existed in sewage treatment plants, and confirmed the rationality of aeration and the submersed flow driver power designed.

该试验在实际污水处理厂进行，对采用同心椭圆型沟道的Orbal氧化沟的流速分布进行了的测定，重点研究了Orbal氧化沟的水力流态特征，验证了曝气及水下推动设备功率配置的合理性。

This paper studies the main geometrical parameter such as angle, height, width, stagger and the upper width in dentation and trapezoid flow path, firstly, uses the single-phase numerical simulation of the computational fluid dynamics technique to analyse the influence of different geometrical parameter on discharge coefficient and flow state exponent of drip emitter. Secondly, uses the two-phases numerical simulation of CFD (1% sand content ) to analyse the influence of the above mentioned geometrical parameter on the contribution regulation of sand and anti-clogging performance. Thirdly, uses the PIV （ particle Tracking Velocimetry ） technique which can see the small-scale flow path to observe and test the trajectories and velocities of solid particles in labyrinth flow path, and analyses the basic factors which can influence the movement characteristic of solid particles and the flow state in flow path.

本文以齿形流道、梯形流道为主要研究对象，以流道转角、流道高，流道宽、偏差量及梯形流道上底宽为主要结构参数，首先应用 CFD 单相流数值模拟技术对不同结构参数灌水器流道水力性能进行模拟，分析了不同结构参数对流态指数和流量系数的影响，其次，应用 CFD 两相流（含沙量为1%）数值模拟技术分析了结构参数对含沙量分布规律和抗堵塞性能的影响，然后，应用 PIV 可视化测试方法测试了固体颗粒在流道内运行轨迹及速度，分析了影响固体颗粒运动特性及流道内流体流态的基本因素，最后，对上述流道结构形式通过模具加工及滴灌带试制，进行了标准化测试（ GB/T 17187-1997 农业灌溉设备滴头技术规范和试验方法与 ISO 标准 ISO /TC23 /SC18 /WG5N4短周期堵塞测试程序），测试结果验证了 CFD 模拟结果，并提出了迷宫结构流道灌水器的抗堵塞设计方法。

So the key of mine water with SS depuration technique is hydrodynamic condition of coagulation and the surface load of sedimentation tank. It is suggested that the GT value of process showed be about 10000and the surface load of sedimentation tank be 0.6-0.8 time of the surface water's.

为此，混凝反应的水力条件和沉淀池的表面负荷是含悬浮物矿井水净化技术的关键，建议反应GT值在10000左右，沉淀池的表面负荷取地表水的0.6~0.8倍。

In order to deep holding the engineering characteristic of the coarse-grained soil, this paper researched object that is the coarse-grained soil of the diametre from 0.1mm to 20mm that was often applied in the dam body filter structure, using the experiment method, carrying out the experiment the research of the coarse-grained soil permeability characteristic.

粗粒土在水力作用下，是一种结构极不稳定的土体，在渗流作用下极易发生渗透变形，容易引起坝体的渗透变形破坏。从渗透系数的变化上分析，其渗透变形过程是一个连续的过程，土体的破坏形式大都属于管涌破坏，破坏坡降较小，一般破坏坡降都小于2.5，有的甚至小于1.0。

The paper systemetically investigates the hydrolic properties of the level swirling inner dissipator and the factors which influence on it by model test on the one hand, on the numerical simulation hand, the paper has simulated the swirling flow field in the level discharge tunnel with Anisotropic k-ε Turbulence Model by programming, in addition with Second-moment Renolds Stress Model by utilizing CFX software.

本文一方面通过模型试验的方法系统地研究了水平旋流内消能工流场的水力特性和影响因素；另一方面选取各向异性的K-ε模型和雷诺应力模型，分别用编程的方式和利用CFX软件数值模拟水平旋流泄洪洞内流场。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。