净头是来自总目负水头损失。
管内流态的变化会影响水头损失的计算。
The type of flow would affect the calculation of water head losses.
并对收缩段水头损失的计算公式进行修正。
The formula to calculating head losses in the contraction section were revised.
此补强方法对水流流态干扰较少，水头损失小。
The method disturbs the flow pattern relatively less and the water head loses in small.
人工湿地水头损失沿长度方向呈明显的线性关系。
The relationship between hydrodynamic loss and lengthwise position of constructed wetland accords with linear equation.
分流情况下的水头损失比汇流情况下的水头损失要大。
When the flow ratio of diffluent and conflux increases, the head loss I...
这当然，回避的问题：什么是总团长和水头损失是什么？
This, of course, begs the questions: what is Total Head and what are Head Losses?
无密实核心。具有滤速高、水头损失小、含污量大的优点。
The utility model has the advantages of high speed of filtering, small loss of water head, and generous content of dirt.
有压弯管局部水头损失计算在倒虹吸等过水建筑物设计中至关重要。
The calculation of local head loss in a pressured curved tube is very important for the design of the construction of inverted siphon.
隔断安全性高，介质通过防止器时水头损失小，有效的防止倒流污染。
The invention has the advantages of high partition safety, small loss for a tap when a medium passes through the preventer and effective prevention on the pollution caused by the backflow.
简述整治建筑物的壅水及其机理，归纳出局部水头损失壅水的通用公式。
The backwater and general formula of the local head loss of regulation structures is presented in this paper.
渡槽渐变段水力学试验的基本目的，是测定渐变段的局部水头损失系数。
The main purpose of the experimental study on the water fow in the transition region of an aqueduct is to find out the local coefficient of head loss in the region.
由于本实用新型的多孔支撑装置开孔率很大，可大大减小过滤水头损失。
As a porous support device has larger opening percentage, the filtering head loss can be greatly reduced.
机翼形量水槽的水头损失不大，水头损失约占上游总水头的14%左右。
The airfoil-shaped measuring flume water head loss isn't higher, and the water head losing has 14% of the total head of water.
这些现象严重危害管道的工况，并且是影响阀道局部水头损失的主要因素。
These phenomenon jeopardize the condition of the project seriously, and it is the main factor that influences the loss of local water head.
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).
论述了滤水管设计的基本要求和地下水由含水层进入滤水管时的水头损失。
This paper deals with the basic demands for designing filter tube and the head loss occurring when groundwater enters into the filter from aquifer.
观察反冲洗膨胀率、洗强度及滤层分布情况。测定滤后水浊度及水头损失。
Observing wash degree, bulging ratio and distributing of filtrating material. Measure turbidity of filtrate and reduction of hydraulic pressure.
通过模型试验，研究可调式跌水网格混合器主要设计参数对水头损失的影响。
According to adjustable head fall mixer, the effect of mixer parameters on head loss was studied in the model experiment.
机翼形量水槽的水头损失较小，平均水头损失约占上游总水头的12%左右。
The head loss of flume is less, and the average loss is nearly 12% of the total head in upstream.
本发明用流线型导流板及杯式叶轮，不易堵塞，且可以达到水头损失小的目的。
The invention use streamlined guide plate and cup wheel, it is uneasy to plug, and can achieve a small headwater loss purpose.
在实际管道工程中，阀门阀道的局部水头损失占管路水头损失的比例是相当大的。
Actually, in the tube engineering, the proportion of the loss of local water head in the loss of pipeline water head is big.
从研究纤维束滤料的传质效率—水头损失特性出发，确定了纤维束过滤器的技术参数。
By making study on the characteristics of mass transfer efficiency-head loss of fiber bundle media, the technical parameters were determined for the fiber bundle filter.
考虑进口及多管道连接处的局部水头损失对短管道系统水击压强的计算结果影响较大。
Ulteriorly, considering the local head loss in inlet opening and pipes junction plays more important role in the calculative results of water hammer pressure calculation of the short pipeline system.
从研究纤维束滤料的传质效率一水头损失特性出发，确定了纤维束过滤器的技术参数。
By making study on the characteristics of mass transfer efficiency - head loss of fiber bundle media, the technical parameters were determined for the fiber bundle filter.
有压管道输水的沿程水头损失计算，关系到工程能否达到设计输水流量和能否安全运行。
The computation for the processing head loss of water diversion in the pressure pipe is related to that whether or not the project can reach the designed flowrate or the project can operate safely.
但同时也存在对进水悬浮物要求较高，磷去除率低，水头损失大，污水提升高度大等问题。
Its shortcomings include harsh restriction for suspended solid in influent, low phosphorus removal efficiency, high water-head loss and the height of lifting sewage.
邱和思门(1971)研究了在圆管和方形管中输沙时具有螺旋运动的水流的水头损失问题。
Chiu and Seman (1971) studied the head loss of flows transporting sediment in circular and square pipes with spiraling motion.
本文提出一种新的非均质拍门，可使拍门在启门时顶铰免受冲力，在稳定运行时拍门水头损失为零。
This paper presents a nonuniform slap door, whose top hinge refrains from impact when the door is opened and the head loss of the water is zero when the door running steady.
在理论分析和实测资料的基础上，作者肯定了谢维·列夫公式能用来分析和计算塑料管的水头损失。
Based on the analysis of hydraulic theory and experimental data obtained by author, it is confirmed that Chevielev's formula can be used for computing the hydraulic head loss of plastic tubes.
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