水头损失

二次微絮凝过滤不仅解决了初滤水浊度偏高的问题，而且提高了对有机物和藻类的去除率，同时滤后水的铝含量没有升高，过滤水头损失也没有明显的增加。

The secondary micro-flocculation could not only solve the higher turbidity of primarily filtrated water , but also improve the removal rate of organic pollutants and algae , without any effect on aluminum content in treated water and significant increase of headloss of the filter .

提出了干扰修正系数C，可用于估算局部阻力干扰的水头损失。

It raises the point of interference revision factor C which may be used in the evaluation of head loss for local resistance interference .

低压PE滴灌毛管水头损失试验

Experimental analysis of head losses in PE laterals under low pressure trickle irrigation

实测表明，k值不随水头损失hf和雷诺数Re变化。

The test shows that the roughness is not a function of both the head loss and Reynolds number .

采用神经网络（ANN）方法对沿程水头损失系数的影响因素进行了分析。

Influential factors of friction factor of head loss are analyzed by adopting artificial neural network ( ANN ) .

铝塑复合（PAP）管局部水头损失的试验研究

On Local Water-Head Loss in PAP Pipeline

大口径PCCP管道沿程水头损失计算探讨

Discussion on friction head loss calculation for large diameter PCCP

U形渠道是灌区广泛推广的灌溉渠道，其具有占地面积少、水头损失小等特点。但U形渠道流速分布规律及其流量测量仍处于研究阶段。

U channel is extensively used in irrigated region , but velocity of flow distributing rule and flux measurement for U channel is being on research stage still .

计算实例表明，采用ANN方法计算沿程水头损失系数简单方便，计算精度高，工作量小，可操作性强，通用性好，工程适用性强。

An example shows that it is convenient and accurate to calculate the friction factor with the ANN model and it can be used in engineering practice .

但是，二次曝气BAF加快了滤池内水头损失，缩短了反冲洗周期。

However , the double aeration BAF accelerated the head loss of the filter , which shorten the backwash cycle .

比较了砂滤和纤维球过滤对浊度、COD、SS和油的去除情况，及其在水头损失、过滤周期和产水量等方面的异同。

The sand filtration is compared with fibre-ball filtration on the removal rate of turbidity , COD and SS , and on the head losses , filtration period and filtrate .

模型计算结果与试验数据以及经验公式的计算成果比较表明，利用ANN模型进行沿程水头损失系数影响因素评估有效和方便。

The calculation result that is compared with test data and empirical formula result , shows that it is convenient and effective to adopt ANN model to analyze the influential factors of friction factor of head loss .

试验结果表明，破碎活性炭比柱状活性炭对浊度、NH3N、CODMn、TOC的去除效果好，且水头损失与膨胀率也大。

This study indicated that the cracked activated carbon removes the turbidity , NH_3-N , COD_ Mn , TOC more effectively , and its head loss and expansion rate are higher than the columnar one .

文中采用VOF方法与标准k-ε紊流模型相耦合，对保水堰的流场进行了数值模拟，计算出了保水堰的局部水头损失系数。

By coupling VOF method and standard k - ε turbulence model , the flow field of water-keeping weir is simulated and the local head loss coefficient of water-keeping weir is obtained ;

双节拍门水头损失系数模型试验研究

Model study on the head loss coefficient of two-stage flap valves

滤池最大过滤水头损失值的确定

Determination of the Maximum Loss of Head Filtered in Filtering Pond

圆锥形喷嘴水头损失的计算公式与试验研究

A Calculative Formula and Experimental Study on Loss-of-Head of Taper Nozzle

建筑内部管道局部水头损失计算新方法

New method for computing the minor head loss in plumbing systems

净头是来自总目负水头损失。

Net Head is derived from Total Head minus Head Losses .

沿程均匀泄流管水头损失的简化计算

A Simplified Calculation of Waterhead Loss Along the Uniform Sluicing Pipe

管井水头损失（垂向流部分）

Water head loss of pipe well ( part of vertical fiow )

阻抗式调压室水头损失系数研究

About the water head loss coefficients of throttled surge tanks

丁、潜坝局部水头损失的试验研究

Studies on local head losses of spur and submerged dikes

改性聚乙烯软管沿程水头损失的试验研究

Experiments of Frictional Head Loss for Polyvinyl Plastic Hose Changed in Nature

沿程水头损失系数研究的一种新方法

A new method for studying friction factor of head loss

均质滤料过滤过程的水头损失计算模型

Calculation Model of Head Loss in the Filtration Process with Uniform Media

水电站进水口拦污栅水头损失试验研究

Study on the head loss of trashrack of intake in hydropower stations

纤维束过滤水头损失方程的研究

Research on Equation of Loss of Delivery Lift for Fiber Bundle Filter

Φ50钻杆压水管水头损失计算探讨

Discussion on the head-loss calculation of φ 50 drilling rod pressured-water tube

倒虹吸有压弯管的局部水头损失系数计算方法比较

Comparison with calculating the coefficient of local head loss models for inverted siphons