研究了具阀门梯度的平面径向流动引起的一类自由边值问题。
The authors consider a free boundary problem arised from the radical flow of plane Non Newtonian fluids with yield stress.
考虑了二次梯度项影响的非线性径向流动问题的无限大地层和有界地层渗流模型。
The models of the nonlinear radial flow for the infinite and finite reservoirs including a quadratic gradient term were presented.
高速流动的油井，由于在井底附近地带存在湍流的影响，达西定律的平面径向流动已不完全适用。
Since turbulence effect appears near wellbore in oil well with high-speed flow, Darcy's Law for flat radial flow is incompletely applicable.
文章介绍一种能模拟地下流体径向流动状态的岩心夹持器的设计思路，并结合图示做了详尽说明。
This paper introduces the design of the radial and multiple-layer core gripper, which can be used to simulate the radial flow status of the reservoir fluid.
降低下层桨的离底高度能加强下层桨的径向流动，并增大上层桨叶轮区和循环区流体的轴向流动。
With the decreasing of C1, the radial flow generated by the lower impeller, the axial flow generated by the upper impeller, and the axial flow of the main circulation increased.
对于具有高速流动的油井，由于在井底附近地带存在湍流的影响，达西定律的平面径向流动已不完全适用。
Because of the effect of turbulent flow near the wellbore zone, Darcy's law for the plane radial flow can't completely apply to the oil Wells of high velocity turbulent flow.
这些径向水平钻孔的形成可以沟通新的瓦斯流动通道，提高煤层气产量。
The radial horizontal bores can connect the new flowing channels of gas to increase the coal-bed methane production.
结果表明，附面层径向涡是该压气机转子流动失稳的一个很重要的原因。
The result shows that the boundary layer radial vortex becomes an important factor for causing compressor flow instability.
小径高比的叶片采用静叶片的正倾斜的方法能够有效地控制流道内部的径向二次流和叶栅顶部的分离流动；
The method of forward leaning stator blade, which can effectively control the radial second flow and the top separate flow, is applied to the design of the small diameter-height ratio blade.
且当表观气速增大，初始流体流动处于由均匀流型向过渡流型的转变，轴向液体速度在径向的梯度非常小；
With increasing of superficial gas velocities, the liquid flow regime was changed from homogeneous to transitional and radial gradient of axial liquid velocity was rather small.
在不稳定的流动状态下，气体的径向浓度分布曲线两边出现不对称。
In the unstable flow the radial distribution of tracer gas concentration is asymmetry.
水泥只在套管或井眼环形空间的某一面的通道内流动的现象，因而不能在所有的径向上提供充分的水力隔离层。
The condition in which cement flows in a channel only on some sides of the casing or borehole annulus, and thus does not provide adequate hydraulic isolation in all radial azimuths.
首次证实了纵向旋涡和径向旋涡的存在，验证了前人旋涡理论假说的正确性，揭示旋涡鼓风机的流动特点。
We confirm firstly the existence of lengthways and radial eddy, verify the accuracy of the former eddy theories hypothesis, and disclose the flow characteristics of the vortex blower.
本文分别对轴向及径向固定床反应器内的流动作了分析。
In this paper, analyses are made for the flow characteristics both in axial and radial flow reactors.
在高速流动条件下，叶栅损失主要是吸力面边界层径向串流及其尾迹。
Under high velocity flow conditions, cascade losses are mainly caused by radial drift of the boundary layer along the suction surface and by blade wakes.
提升管反应器内气固两相在轴向和径向上都存在着流动、传热与反应的不均匀分布。
The axial and radial distribution of flow, heat and mass transfer of gas-solid two phase is very uneven in the reactor.
结果表明：忽略加热段内蒸汽温度的轴向变化及蒸汽流动的径向变化，钠热管声速限与实际误差在10%以内。 理论与实验较为吻合。
When the radial component of the vapour velocity and the axial variation of the vapour temperature were neglected, the error of the sonic limit is within 10 per cent.
分析表明：强力旋压毛坯件的变形流动主要是轴向变形，影响成形质量的因素主要是成形过程中的径向变形和切向变形。
The results indicate that the deformation flow of power spinning is mainly axial deformation, the radial deformation and circumferential deformation have an impact on the forming quality.
表明壁面的“阻尼”影响主要集中在近壁面0 . 5D以内，在径向上流动既有顺压梯度，又有逆压梯度。
It is shown that the "damping" effect mainly exists in the zone of 0.5d from the impingement wall, and there are positive as well as adverse pressure gradient in the radial direction.
为了探讨在不同径向角下动量比和湍流度对圆柱形气膜孔流动和换热的影响规律，采用数值模拟方法，研究了涡轮叶片的冷却效率。
The cooling effectiveness of cylindrical gas-film cooling holes was numerically investigated, which was determined at different radial angles, momentum ratio and turbulent intensity.
压水室采用导叶式结构能够尽快地把液体的动能转换为压力能，同时能够使泵腔内的流动更趋合理均匀，提高泵内气液分离的能力，并且能平衡叶轮径向力。
The volute of guide-vane structure can transform the kinetic energy to pressure energy as soon as possible, and improve the capacity of separating gas and liquid for the more balance flow in it.
径向湍流强度测量结果显示，此时管中流动已是复杂的三维结构，而非轴对称的二维结构。
Results of turbulence intensity across the pressure node plane also show, the regular and symmetrical flow structures in the tube have been turned to turbulence.
结果表明，提升管内气、固两相沿轴向、径向和切线方向的流动不均匀，并非完全对称流动，而以S型螺旋形上升流动。
The simulation results showed that the flow of gas-solid two-phase was non-uniform in axial, radial and tangential directions, and was not symmetric flow as expected, but was up in S-type form.
通过管中心和其它管线的速度变化趋势，以及圆管径向的速度分布，描述了流场的整体流动特性，揭示了非牛顿流体管道流的速度过冲和振荡现象。
They can easy show the behaviors of the flow in the whole cube, reveal the phenomenon of locity overshooting and damping oscillation of the flow.
通过管中心和其它管线的速度变化趋势，以及圆管径向的速度分布，描述了流场的整体流动特性，揭示了非牛顿流体管道流的速度过冲和振荡现象。
They can easy show the behaviors of the flow in the whole cube, reveal the phenomenon of locity overshooting and damping oscillation of the flow.
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