沿程阻力

通过实际工程中测量的污垢粗糙高度ks，拟合出了污水管道沿程阻力系数公式。

Through the metrical dirt roughness height in practicable project , the on-way resistance coefficient formula of sewage pipe is fitted .

还有部分管线由于腐蚀结垢，沿程阻力增大。

Erosion and scale deposit in partial pipelines made more on-way resistance .

通过对流体力学中沿程阻力系数和泵与风机工作点等问题的求解，介绍了EXCEL单变量求解器和曲线拟合的方法。

Through calculating friction factor and operating point of pump or fun of two examples on fluid mechanics , methods using solver and curve-fitting in EXCEL were introduced .

采用Powell法，以辛八注水站为例计算，优化后注水管网管线中流体的总沿程阻力损失比优化前下降约6.3%。

For example , using feasible Arithmetic Of Powell , the energy losing declined 6.3 % in pipeline net of Xin-8 Water-injection Station after optimizing .

螺旋流运动中水流质点的运动轨迹ds远大于旋流洞长度dx，等于延伸了旋流洞长度，加大了沿程阻力损失；

The movement track ds of water particle is further more than the length dx of eddy flow grotto , equal to extend the length of eddy flow grotto , increase the loss of resistance along its tracks ;

对1000MW级大型汽轮发电机冷却系统进行了研究，给出了转子绕组本体部分各匝导体通风道的局部阻力系数和沿程阻力系数的计算方法。

This paper studied the rotor winding ventilation of a 1 000 MW inner cooled turbine generator . The methods to calculate the friction loss and minor loss coefficients of each turn vent of rotor coils were provided .

流体在工业管道中流动沿程阻力计算的研究

Study on calculating frictional resistance of fluid flowing in industrial pipe-line

冷却水系统沿程阻力快速计算表

On fast calculation table of frictional resistance in cooling water system

红外燃烧器火孔沿程阻力系数的分析

Analysis of Distance Resistance Coefficient of Burner Ports of Infrared Burner

基于管道沿程阻力的流量测量方法

A Method of Flow Measurement Based on Pipe Friction Drag

连续管内流体流动过程，伴有很大的沿程阻力损失。

Fluid flow in the coiled tubing , accompany by a large frictional loss .

给出了湍流区沿程阻力系数绝对误差的计算式。

Gives a calculation formula of the absolute error of specific frictional head losses .

通常在计算局部阻力时没有考虑沿程阻力。

In general , the friction head is not concerned in the local resistance computation .

软管沿程阻力系数的测量方法

Measurement Means of Flexible Tube Resistance Coefficient

应用几种不同的湍流模型，模拟计算水力光滑管的沿程阻力系数。

Friction loss factors of hydraulically smooth pipes have been calculated by using several different turbulent models .

对红外燃烧器头部能量损失系数计算中的火孔沿程阻力损失提出了修正，提出火孔内的温度分布对流动造成的影响。

In past calculation method the energy loss coefficient of infrared burner was put forward to modify .

结果表明，催化器载体的沿程阻力损失是催化器压力损失的主要来源；

The results show that the pressure losses mainly come from the monolith resistance along the converter .

介绍了利用流体管道直管段的沿程阻力计算管道流量的原理和方法。

The principle and method of pipe flow calculation using friction drag of a straight pipe are introduced .

沿程阻力大小与狭缝大小、供气压力、透气砖长度等存在密切关系。

The resistance , slot size , gas supply pressure and plug length are all very closely inter dependent .

不可压缩单相流体紊流区沿程阻力计算一维单相流管路水锤现象的数值模拟

Calculation of Uncompressible Single - phase Turbulent Flow The Numerical Simulation of Water Hammer in Single - Phase Flow

研究表明：载体的沿程阻力和扩张管的局部阻力是构成催化转化器压力损失的主要来源；

Theoretical results show that the converter pressure losses mainly result from the monolith resistance and diffusion header losses .

这样物料和热气体的换热将更充分，但会增加一些沿程阻力。

In this way exchange heat between materials and thermal gas will more effect , but the resistance will improve .

分析了目前工业管道设计中存在沿程阻力计算不够准确这一现象的原因及由此产生的后果。

Analysis the causes and results of the phenomenon that calculating of frictional resistance in industrial pipe-line design is not accurate enough .

沿线压力的变化主要是由管道特性的变化和不同密度油品在管道中交替产生的，某时刻管道的流量将由各站间供能（启泵方案）、耗能（沿程阻力）以及高程决定。

The linear pressure variation is mainly caused by the change of pipeline property and the alternation of product oils with various densities .

对于沿程阻力的计算，将流体分为均质流与非均质流，分别给出沿程阻力系数的计算公式；

For the convenience to calculating the linear loss , the formulas of the resistance number of even and uneven flow were given ;

表观黏度和表观沿程阻力系数随煤粉浓度显著增大，随温度显著减小，并与管径和流速有关；

The apparent viscosity and the linear resistance coefficient would increase evidently with the coal 's concentration , and decrease evidently with temperature .

试验结果表明，水煤膏管内流动存在滑移现象，其管内层流流动的沿程阻力损失系数的计算公式与牛顿流体具有相同的形式，且计算精度比较满意。

The data obtained from experiments show that the accuracy of the equation of the energy loss coefficient of CWP laminar flow in pipes is satisfactory .

实验结果表明：抽油杆柱对聚合物采出液的沿程阻力主要取决于聚合物采出液的黏性，弹性影响可忽略不计；

Experimental results showed that on-way resistance of rod string to polymer solution depends mainly on viscosity of polymer solution and elasticity of polymer solution can be neglected .

随着风扇转速的增大，系统流速上升，各段沿程阻力的数值及所占比例均产生明显变化。

With the rise of fan speed , the flow velocity of the system increased , and the number of resistance and its proportion would have obvious variation .

对交叉缩放椭圆管进行了实验和数值研究，给出了换热和沿程阻力系数实验拟合关联式。

An experimental and numeric study was carried out for the alternating elliptical axis tubes . The fitted correlation was derived for the experimental heat transfer and resistance coefficients .