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frictional drag
相关语句
  摩擦阻力
     FRICTIONAL DRAG PRODUCED BY PISTON O—RING
     O型活塞密封圈所产生的摩擦阻力
短句来源
     A PREL IMINARY STUDY OF FRICTIONAL DRAG MODEL AND ITS APPLICATION TO DIRECTIONAL WELIS
     定向井中摩擦阻力模式及其应用的初步研究
短句来源
     Based on a simple two layered marine model,the paper seeks a solution of marine seismic wavefield formed by the source in water when frictional drag of sea bottom can be neglected,gives a receiving character on sea bottom multi component receiver and obtains theoretic sea bottom multi component records from source in water by Fourier method.
     本文根据两层简单海洋模型 ,在忽略不计海底摩擦阻力的条件下 ,求解水中震源所形成的海洋地震波场 ,给出海底多分量的接收特性 ,进而用傅里叶方法得到水中震源的海底多分量理论记录。
短句来源
     Study on Skin Frictional Drag of Fibre in Coagulation Bath and Its Application in Dry-Wet Spinning Method
     凝固浴对丝条的摩擦阻力公式及其在干湿法纺丝中的应用
短句来源
     The frictional characters, the influence of material compatibility, the effect of NBR deformation on the starting frictional drag of friction pairs used in ASP flooding are investigated.
     探讨了丁腈橡胶在三元复合驱液中的摩擦过程特征、材料匹配性的影响和橡胶变形量对摩擦副启动摩擦阻力的影响。
短句来源
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  摩阻力
     THE CALCULATION AND ANALYSIS OF BHA FRICTIONAL DRAG ABOUT DESIGN WELLBORE CONTRAST REAL WELLBORE IN WELL GUPING 1
     古平1井设计井眼与实钻井眼井下钻具的摩阻力计算分析
短句来源
     Negative frictional drag calculation and its influence on pile bearing capacity
     负摩阻力计算及对桩承载力的影响
短句来源
     The software based on the model is used to predict the frictional drag and hook load of running completion casing string in the experimental horizontal well (Well No. HW701) in Kelamayi oilfield, and the calculated results agree with the measured data.
     在克拉玛依油田的试验水平井HW701中用该模型开发的软件预测了完井套管柱下入的摩阻力和井口载荷,预测结果与实测结果吻合较好。
短句来源
     ANALYSIS OF DRILLSTRING FRICTIONAL DRAG IN HORIZONTAL WELLS OF DAQING
     大庆水平井摩阻力分析
短句来源
     This article offers a method for solving the frictional drag, that is, according to the various buckled shapes of coiled tubing in different hole sections, working out the mean contact counterforce in a screw pitch in solving the radial contact counterforce.
     求解摩阻力时,可针对连续油管在井身中不同结构段的不同变形形状,采用求解径向接触反力时求一个螺距内平均接触反力的方法加以解决。
短句来源
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  “frictional drag”译为未确定词的双语例句
     Drag reduction tests and wall concentration mea-surment for a 3.0m long flat plate and a 5.463m long body of revolution with polymer slot injection were carried out with Reynolds numbers in the range of 3.0× 106 to 5.4× 107. The maximum frictional drag reduction obtained are 45 percent and 39 percent repectively.
     对于长为3.0米的平板和5.463米的回转体,在Reynolds数为3.0×10~6~5.4×10~7范围内进行了缝喷降阻聚合物溶液的阻力试验和壁面浓度的测量,所获得的最大摩阻降低率分别为45%和39%。
短句来源
     Method to Increase the Accuracy of Measuring Lost Circulation Position Using Annular Frictional Drag
     提高环空摩阻法测量井漏位置精度的方法
短句来源
     Calculation of Frictional Drag of Casing Running in Horizontal Wells,
     水平井下套管摩阻分析计算
短句来源
     AN EXPLICIT EXPRESSION OF THE TURBULENT FRICTIONAL DRAG COEFFICIENT FOR A FLAT PLATE
     平板湍流摩阻系数的显式表达式
短句来源
     This paper tries to pinpoint the frictional drag coefficients of dilute polymer solutions flowing through canvas hoses, obtained by experimental methods.
     本文对高聚物稀溶液在帆布管内流动的摩阻系数进行了实验研究。
短句来源
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  frictional drag
The theory of Part I is extended to take account of vertical motion and frictional drag.
      
The generated oscillation may result in an optimization of the flow by reducing the net power loss to frictional drag.
      
Instabilities with reduced frictional drag in the rotating channel flow of dilute polymer solutions
      
Movement of the particles against the rotation of the magnetic system was due to the nonuniformity of the field at the drum surface and the frictional drag of the particles moving towards the permanent magnets.
      
We were able to quantitively account for these differences in a simple way by incorporating the frictional drag associated with the ion bound on the vortex core into the equations of motion.
      
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Drag reduction tests and wall concentration mea-surment for a 3.0m long flat plate and a 5.463m long body of revolution with polymer slot injection were carried out with Reynolds numbers in the range of 3.0× 106 to 5.4× 107. The maximum frictional drag reduction obtained are 45 percent and 39 percent repectively.The tests of self-propulsion and noise measurments of a 5 bladed screw propelled 4.0m long body of revolution with polymer slot injection were conducted. The results obtained show that thrust deduction...

Drag reduction tests and wall concentration mea-surment for a 3.0m long flat plate and a 5.463m long body of revolution with polymer slot injection were carried out with Reynolds numbers in the range of 3.0× 106 to 5.4× 107. The maximum frictional drag reduction obtained are 45 percent and 39 percent repectively.The tests of self-propulsion and noise measurments of a 5 bladed screw propelled 4.0m long body of revolution with polymer slot injection were conducted. The results obtained show that thrust deduction fraction is slightly increased and wake fraction decreased.The level of noise spectrum of screw behind body of revolution is droped about 1 db with frequency in the range of 5-40kc.A differential relationship used to determine wall shear stress for streamline bodies of revolution with polymer injection is given and numerical calculation is conducted. Results of calculation for drag reduction are in good agrement with the above experimental data.

对于长为3.0米的平板和5.463米的回转体,在Reynolds数为3.0×10~6~5.4×10~7范围内进行了缝喷降阻聚合物溶液的阻力试验和壁面浓度的测量,所获得的最大摩阻降低率分别为45%和39%。 对于长为4.0米的回转体配五叶螺旋桨在喷液下进行了自航试验和船后螺旋桨的噪声测量。测试结果表明,推力减额t略有增加,伴流系数w减少,船后螺旋桨的噪声在频率为5~40kc频谱范围内约有1分贝的降低。本文导出了缝喷回转体的剪切微分关系式,并对长为5.463米的回转体进行了缝喷降阻计算,计算表明理论结果与试验结果比较吻合。

When it is required to check the ability of resisting frost heaving upswell of foundation pile, the frictional drag is currently taken as the same as the value of that for the axially tensile piles. The action of frost heaving counter-force to unfrozen soil by the process of freezing is analysed in the paper according to the stress state of the frost heaving upswell of foundation piles. It is pointed out that the interaction mechanism between foundation and piles during frost heaving upswell and ithe frictional...

When it is required to check the ability of resisting frost heaving upswell of foundation pile, the frictional drag is currently taken as the same as the value of that for the axially tensile piles. The action of frost heaving counter-force to unfrozen soil by the process of freezing is analysed in the paper according to the stress state of the frost heaving upswell of foundation piles. It is pointed out that the interaction mechanism between foundation and piles during frost heaving upswell and ithe frictional drag, distribution are both similar to the case of compressive pile. Therefore frictional drag of compressive pile is suggested to replace that of the tensile pile to check the ability of resisting frost heaving upswell of foundation pile.

目前,对季节冻土地区基桩抗冻拔验算,暖土部分的摩阻力多规定按轴向受拉桩的摩阻力取值。本文根据基桩冻拔的特定受力状态,论述了冻结过程对暖土的冻胀反力作用。提出:冻拔时暖土部分桩土作用机理与摩阻力分布规律,均与轴向受压桩类似,从而提出应按轴向受压桩的摩阻力值进行基桩抗冻拔验算的观点。

If frictional drag is considered in the equation of gradient wind for a stationary typhoon with circularly symmetric distribution of pressure, the balanced equations for the forces can be expressed asSolving the above set of equations, velocity of gradient wind ν(k,c) and inner deflection angle β(k.c) can be obtained.ν(k.c) and β(k.c) represent the effects of frictional drag and moving velocity of typhoon respectively. Now, setting K = 0, we can find ν(0.c), and β(0.c) (here, β(0.c) = 0) ,and then...

If frictional drag is considered in the equation of gradient wind for a stationary typhoon with circularly symmetric distribution of pressure, the balanced equations for the forces can be expressed asSolving the above set of equations, velocity of gradient wind ν(k,c) and inner deflection angle β(k.c) can be obtained.ν(k.c) and β(k.c) represent the effects of frictional drag and moving velocity of typhoon respectively. Now, setting K = 0, we can find ν(0.c), and β(0.c) (here, β(0.c) = 0) ,and then define a frictional correction coefficient c as v(k.c)/v(0.c) (i.e. c = ν(k.c)°/ν(0.c)).In the case of Myers pressure expression, the computational results show.1. Both c and β are variables.The characteristics in their radial distributions are that c is about 0.6 at the edge of typhoon, and increases inward to nearly 1 in the vicinity of typhoon centre: β is about 35° at the edge and 2°-8° near the centre, it decreases inward;ν(k.c) reaches its minimum at the edge and the maximum appears at r = R0, it sharply decreases inward further.2. C and β are also related to the characteristic parameters △P, R0,,Yc and Vc. For instance, β decreasen and c increases when △P becomes larger. It is consistent with the case that typhoon develops and enhances the rota-tios of its flow.To sum up, the model proposed here is more reasonable than those with c and β as constants,in the simulation of wind field of real typhoon by using statistical data.

本文采用含有摩擦力项的台风梯度风方程,其离心力项中曲率半径的计算考虑了台风移动的因素,由此得到的台风风场模式,其梯度风摩擦修正系数c和风向内偏角β都是变化的。c一般从台风外围的0.6以下向台风中心方向递增,到台风眼壁附近其值接近1.0;β由外围的35°左右向台风中心方向递减,到眼壁附近减为5°以下,这比以往所用模式都有明显的改进。

 
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