就水流的整体而言，呈螺旋流运动。
For the whole water, the special movement is the spiral flow.
使用螺旋流顶替理论能克服这一缺点，大大改善顶替效率。
Adopting helical flow displacement theory can overcome the disadvantage and greatly improve the displacement efficiency.
石油和化工中许多问题需要求解非牛顿流体偏心环空螺旋流。
Many problems in petroleum and chemical industry can be reduced to the solutions of the helical flow of Non-Newtonian fluid in eccentric annular space.
对动态水力旋流器圆管螺旋流场结构及形成原理作了简要描述。
The structures and forming principles of the cylindrical spiral flow field of a dynamic hydro-cyclone were briefly described.
为实际运用螺旋流输沙技术解决泥沙淤积问题提供了理论依据。
The study offers theoretical foundation for the problem that the technolo…
同时利用直圆管柱模型，模拟计算出了圆管螺旋流的理论分布结果。
The theoretical distributions of the cylindrical spiral flow were simulated and calculated using the straight cylindrical model.
通过对管内螺旋流旋转流体的动量特性分析，从理论土得出压力沿径向分布规律。
Through analyzing momentum equation of infinitesimal swirling flow, pressure distribution with the radial difference was demonstrated.
提供了一种既能保证套管居中，又能产生水泥浆环空螺旋流的套管弹性旋流扶正器。
A kind of device which can keep the casing at the center of borehole and can also generate helical flow of cement slurry, which is the Spring Whirlflow casing Centralizer, is presented in this paper.
进入涡管槽口的挟沙水流会形成强有力的螺旋流沿涡管流动，能有效地排除底部推移质泥沙。
The flow with sediment trapped by the slit of the vortex tube can form vortex inside the tube and exclude efficiently the coarse sediment near the bed layer in front of the tube.
本文全面地研究了幂律流体和宾汉流体在偏心环空中层流螺旋流的流动规律与流动状态的判别。
This paper studies the flow law of the laminar helical flow of the power law fluid and Billgham fluid in eccentric annular space and the determination of the flow state.
采用数学规划优化方法对N8160ZC柴油机新型螺旋流排气系统结构参数进行了优化设计；
The structural parameters of swirl flow exhaust system for Model N8160ZC diesel engine have been calculated by using the mathematical optimum method for optimum design.
从算例可以发现：在其它参数不变的情况下，钻柱的偏心对幂律流体螺旋流轴向流量的影响非常大。
It was observed from examples that eccentricity of drill string had major effect on the axial flow rate of Power-law screw fluid when the other parameters were invariant.
其在工业上的应用十分广泛，如在射流技术、燃烧技术、气力输送及水力浮选等方面均采用了螺旋流。
Swirling flow is widely used in industry, such as in jet technology, combustion technology, pneumatic transportation, hydraulic flotation etc.
在工业上应用十分广泛，如在射流技术、燃烧技术、气力输送、旋风分离及水力浮选等方面均应用了螺旋流。
Swirling flow is widely used in industry, such as in jet technology, combustion technology, pneumatic transportation, cyclone separator, hydraulic flotation and so on.
对用于产生螺旋管流的圆管螺旋流起旋器的结构参数进行了分析，并对其阻力特性进行了理论分析和试验研究。
The structure parameters and resistance characteristics of spiral pipe flow generator which generates spiral flow in circle pipe were analyzed and investigated.
漏斗排沙方式利用螺旋流的分离机理来排除渠道泥沙； 平轴螺旋管流排沙是利用在管间加设导叶的方式产生螺旋流来输运泥沙。
The way of the sand funnel make use of separating mechanics of spiraling flow to breed out the sediment of the channel.
带动力实验进行洞壁干扰修正时，必须考虑螺旋桨滑流的影响。
The effect of propeller induced slipstream to the experiment data must be corrected.
绕着光涡旋的黑暗中心，光束携带的能量流就像螺旋梯，沿着顺时针或者逆时针方向流动。
Around the dark core of an optical vortex, the energy flow carried by the light beam is like a spiral staircase, flowing in a clockwise or counterclockwise direction.
文章侧重讨论螺旋管流输移固粒的特征机理与起旋器效率的测试与计算方法。
The characters and mechanism of the transport way, and the calculation and measurement method of the efficiency of the pipe cyclone are presented.
前两种排沙方式已经广泛应用于工程实践中，平轴螺旋管流排沙是近年提出的一种节能、高效的输沙方式，目前还处于试验研究阶段。
The spiral flow in the horizontal pipe can generate the spiral flow to transport sediment according to the way of equipping the guide blade in the middle of the pipe.
简要介绍了螺旋折流板换热器的折流板及定距管尺寸的CAD计算方法。
The method of CAD calculation for the sizes of baffle and spacer in helical baffle heat exchanger was briefly introduced.
所作研究对于锥形螺旋叶轮血泵叶轮和流道的优化设计具有指导意义。
The investigation has important significance to the optimization of the conical spiral impeller and the flow channel.
为了避免由于势流假设引起的不准确性，螺旋桨设计者引入了实效伴流的概念。
To avoid the inaccuracy caused by this potential flow assumption, propeller designers have introduced the notion of the effective wake.
长螺旋钻孔压灌超流态混凝土施工技术是一种值得推广的新型成桩技术。
The construction technology of long spiral drilled press-grouting super-fluid concrete pile is a new kind of pile-forming construction technology.
试验结果表明，螺旋折流板阻力只有弓形的30%，此外，在同样的压降下，螺旋折流板传热效率也提高10%。
Test results show the resistance of spiral plate is 30% of that of segmental baffle, and the heat transfer efficiency is improved by 10% at the same pressure.
介绍了螺旋折流板换热器折流板的结构形式和特点，给出了螺旋折流板各部分几何尺寸的计算公式。
Spiral baffle heat exchanger baffle type and feature are introduced, and the calculation formula of all geometry dimension of spiral baffle are given.
结果显示：涡管流函数是时间的周期函数，并被表征为一系列在涡核内均匀分布螺旋涡丝流函数的叠加。
The result showed that the stream function of vortex tube was expressed as the superposition of the stream functions of vortex filament within the vortex core.
螺旋桨在不均匀伴流中操作引起的激振是船舶设计一个非常重要的因素。
Propeller-induced vibration caused by propeller operation in unsteady wake flows remains a highly important factor in ship design.
螺旋桨在不均匀伴流中操作引起的激振是船舶设计一个非常重要的因素。
Propeller-induced vibration caused by propeller operation in unsteady wake flows remains a highly important factor in ship design.
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