This article mainly introduces the prediction method of the flow pattern, pressure gradient and liquid holdup of two phase flow in horizontal pipelines.
本文着重介绍水平管中这种两相流动的流动型态、压力梯度和持液率的预测方法。
Research on characters of non-Darcy flow and starting pressure gradient of low permeability reservoir were foundation of reservoir production.
低渗透储层渗流具有非达西特征和启动压力梯度，是研究低渗透储层开发过程中问题的基础。
Dual linear gradient elution can be performed with two specially made glass container and a high pressure constant flow pump.
用两个特制的玻璃容器及一台平流泵即可实现二元线性梯度洗提。
The high head produced by the impeller means high adverse pressure gradient within blade passage and because of this the flow often separates from the blade surfaces even at the design point.
低比转速泵的高扬程决定了叶片流道内逆压梯度比较高，这种压力分布使得水流易于在叶片表面脱流分离，这一现象甚至在泵的设计点也难以避免。
Moreover, the abatement of a transverse pressure gradient will be beneficial for decreasing transverse flow losses.
而横向压力梯度的减弱将有利于减少横向流动损失。
The separation flow is three dimensional in hydraulic machine. The pressure gradient in cross direction produces secondary flow in boundary layer.
水力机械的分离为三维流动，三维流动的侧向压力梯度产生边界层的二次流动。
The experiments show that microbe solution flooding can decrease the threshold pressure gradient, lessen the flow resistance, and extend the effective drainage distance.
与水驱相比，微生物驱油可降低启动压力梯度，降低渗流阻力，扩大有效驱动距离。
The result shows that the change of gradient of kick-off pressure, the storage ratio and the ratio of formation coefficients have relatively big effect on the slug flow well test result.
结果表明：启动压力梯度、层间储容比、地层系数比的变化对段塞流试井解释结果有较大的影响。
In zero pressure gradient flow, this local momentum loss is Minost an additive constant quantity. On the other hand, adverse pressure gradient results in amplification of this momentum loss.
在零压力梯度下，这个局部的动量损失几乎是一个附加的常量，而逆压梯度则会扩大这种动量损失。
The effect of the pressure gradient on critical Reynolds number is also displayed and the influence rule of the different pressure fields on the flow stability is exploited.
还研究了压力梯度对临界雷诺数的影响，探讨了不同压力场对流动稳定性作用的规律性。
The threshold pressure gradient of low permeability sandstone was studied experimentally by measuring the pressure attenuation in an unsteady seepage flow.
为了研究低渗透砂岩的启动压力梯度，设计了一种非稳态渗流中测量压力的试验方法。
In addition, numerical simulations of turbulent flow over riblet surface are carried out in 7 kinds of pressure gradients. The effect of pressure gradient is analyzed.
同时还对7种压力梯度下沟槽表面流场进行模拟，研究了压力梯度对减阻效果的影响。
Velocity gradient, pressure gradient and circulation gradient are used to model the separated vortex flow field over a leading edge delta wing.
用速度梯度、压力梯度和环量梯度模拟大攻角尖前缘三角翼流场。
Based on the flow equation concerned on threshold pressure gradient and deforming media, this paper productivity equation and IPR forecasting method for low permeability reservoir.
基于考虑启动压力梯度和介质变形特性的单相流渗流方程，建立了适应于低渗透油藏油井的产能方程，并给出了低渗透油藏单相流ipr预测方法。
Aim To resolve the influence of pressure gradient, liquid hold-up and mixture density of the different flow model on the design and operation of gas-lift well in oil recovery.
目的解决深井气举采油过程中不同流动型态的压力梯度、持液率、混合物密度对气举井设计和运行影响的问题。
The static pressure gradient in cyclone air classifier can have influence on the test and measurement for its flow fields by five-hole probe.
用五孔探针测试旋流式气力分级机流场时，分级机内存在的静压梯度会对测试产生影响。
In view of seepage process in vertical fracture well in low permeability reservoir, considering kickoff pressure gradient and media deformation coefficient, bilinear flow model is established.
针对低渗透地层垂直裂缝井的渗流过程，考虑了启动压力梯度和介质变形系数的影响，建立了三线流模型。
The results of calculation prove that the flow of coating in conical shaped die can create pressure gradient of coating in die.
通过计算证明，涂料在圆锥形模具中流动时，能够在模具内产生一定的压力梯度。
Based on the theory of two-phase flow, the equation of the pressure gradient is found for the short pipe in cavitation jet cutting set.
基于两相流体动力学的理论，建立空蚀射流切割装置中短管内的压力变化梯度的基本方程式；
Meantime, the pressure gradient region, which producing the non-linear seepage flow, was calculated.
并确定了产生非线性渗流的压力梯度区域。
Furthermore, the total pressure along the flow direction reduces gradually, and the corresponding static pressure increases with small gradient, the maximum value occurs at the end of FADS.
沿着流动方向，空气全压均逐渐减小，静压则逐渐增大，但增幅不大，末端处静压复得现象较为明显。
Moreover we found the rule of distribution of pressure on wall surface and discussed the influence of rate of curvature and gradient of pressure on the characteristics of spill flow hydraulics.
同时给出了壁面压强分布的规律和探讨了壁面曲率和压强梯度对溢流水力特性的影响。
Time dependent calculation for a suddenly imposed pressure gradient has shown that variation of the cross sectional area reduces inertial effect in the contraction flow region.
压力差为阶跃变化的情况下数值计算结果说明了收缩部的断面积的时间变化减少了收缩部的惯性效果。
One was the laminar flow in the pipe(also called the Poiseuille flow). The analytic form of the relationship between the flow rate and the pressure gradient along the pipeline was obtained.
其一是圆管层流（又称泊肖叶流动），得到其流量和沿管方向压力梯度之间的解析关系式。
The results showed that mobility and start-up pressure gradient are the main reasons of non-linear seepage flow effect.
结果表明流度与启动压力梯度是形成非线性渗流的主要因素。
The practical parameter of a helical pipe was used to proceed to calculation. The relation between flow flux and pressure gradient in different curvature and torsion a helical pipe is studied.
利用螺旋管的实际参数进行了计算，研究了不同曲率和挠率螺旋管道内流量与压力梯度之间的关系。
LC Gradient System VLIncludes gradient pump (max. pressure 400 bar) with integrated degasser, manual injector and variable wavelength detector with standard flow cell.
1220高效液相色谱仪（二元梯度泵），带手动进样器、紫外检测器，标准流通池。
While an incompressible liquid flows through a rotating inclined-tube with a constant pressure gradient the secondary flow due to Coriolis Force appears on cross section of the tube.
流体在压差作用下，流经绕与中心线成任意角的转轴匀速旋转的圆管时，由于哥氏力的作用，垂直于中心线的截面内将产生二次流。
This blade can be used to produce counter pressure gradient at cascade passage end, reduce secondary flow loss, increase the efficiency of IP casing consequently, and improve the heat rate of units.
本文讨论了透平叶栅中的二次流产生的机理，并深入探讨了一种减少二次流损失的有效方法---叶片斜置和复合斜置技术，分析研究它对叶栅气动性能和级特性的影响。
This blade can be used to produce counter pressure gradient at cascade passage end, reduce secondary flow loss, increase the efficiency of IP casing consequently, and improve the heat rate of units.
本文讨论了透平叶栅中的二次流产生的机理，并深入探讨了一种减少二次流损失的有效方法---叶片斜置和复合斜置技术，分析研究它对叶栅气动性能和级特性的影响。
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