This is the new explanation to mechanism of drag-reduction raised in this paper.
这就是本文提出的关于减阻机理新的解释。
Parts of the pipes are dismountable so that we could investigate the drag-reduction effect of different pipe diameters.
实验管段部分可拆卸，以实现对常见管材不同管径的减阻效果研究。
This paper studies on the feasibility of applying the additive drag-reduction technology to practical engineering project in water system of HVAC.
本文将从应用基础的角度研究添加剂减阻技术在暖通空调水系统中实际工程应用的可行性。
The last, through experiments of flume and water tunnel, the liquid slip effect on drag-reduction over super -hydrophobic surface for various flow conditions was researched.
通过水槽和水洞的实验，研究了超疏水性表面在不同流动条件下的减阻特性。
The drag reduction of the notchback car platoon is the most.
阶背式轿车队列的平均减阻率最大。
The mechanism and methods of viscosity drag reduction are briefly discussed. Some of its applications for saving energy and materials, improving efficiency or reducing noise and vibration are given.
本文综述了几种粘性减阻方法及其减阻的机理，联系了其在水相、油相中节约能源、材料，提高速度和效率等方面的应用。
The site application results show that applying HG dra not only obtain satisfactory drag reduction effectiveness and increase transportation capacity of pipeline, but also ensure the safe operation.
现场应用结果表明，添加hg减阻剂不仅具有较好的减阻效果和增输能力，提高了输送的经济效益，同时保证了输油生产安全平稳运行。
Based on our flow visualizations, a new mechanism of drag reduction is proposed. The device has been refined and net drag reduction has been achieved.
建立在自己流动显示的基础上，提出了新的减阻机理，改进了设计，并获得较好的减阻效果。
The proposed drag reduction mechanism and drag reduction method are valuable both theoretically and in engineering to realize the low drag pipeline transport of highly viscous fluid.
所提出的减阻机理及工程减阻方法对实现高粘度流体的低阻力管道输送具有重要的理论指导意义和工程应用价值。
Drag was decomposed to entropy drag and induced drag, according to the physical mechanism of drag production, based on the wake integral method, which was very useful for drag reduction design.
利用尾迹积分法按阻力产生的物理机制，将阻力分解为熵增阻力和诱导阻力进行数值计算。
By determining drag reduction efficiency of polymer in a simulative loop evaluation apparatus, effects of DDS as external electron donor on number and distribution of active centers were confirmed.
结合室内模拟环道评价装置，测定聚合物的减阻性能，确定DDS作为外给电子体对聚合活性中心数量和分布的调变作用。
The experiment results demonstrate that the balloon actuators can be used for separation delay and drag reduction to realize active flow control.
实验证明：所开发的气泡致动器可以有效地进行延迟分离，降低压差阻力，实现了主动流动控制。
Research on drag reduction mechanism of supercavitation shows that supercavitation can reduce not only the friction drag coefficient but also the pressure drag coefficient.
超空泡减阻机理的研究表明：超空泡不仅可以减小回转体的摩擦阻力，还可以减小回转体的压差阻力。
The results are meaningful for explaining the mechanism of drag reduction from submicroscopic level.
所得结果对于从亚微观层次解释减阻机理有实际意义。
The new type of rheology controller has its application potential in drilling, Enhanced Oil Recovery (EOR) and liquid transportation drag reduction.
这种新型流变控制剂在钻井、提高采收率以及流体输送减阻中具有潜在应用价值。
The researches of drag reduction by grooved surface in water are mostly concentrated in experimentations recently, and researches in theory and numerical calculation are lacked.
近年来对于水下条纹沟槽表面减阻的研究多集中在试验方面，理论分析和数值计算进行的却不多。
The experiment shows that it can drag reduction and extend the discharge distance of pipeline transportation by ejecting compressed air to dredger pipeline.
分析了管道输送加气减阻的机理和延长排距的效果，在模型试验的基础上进行了实船试验。
The technology of magnetic fluid viscosity drag reduction is a new one.
磁性液体粘性减阻技术是一种新兴的技术。
Currently, the research target of this realm is raising the drag reduction efficiency, at the same time, is increasing its anti-to shear function and lower the usage cost as far as possible.
目前，这一领域的研究目标是在不断提高其减阻效率的同时，尽量增强其抗剪切稳定性及降低其使用成本。
The fundamental principle of the plasma drag reduction and its key technologies are discussed.
分析了等离子体减阻的基本原理及所涉及的一些关键技术点。
This paper gives a brief introduction of the drag reduction characteristics of the dilute solution of high polymer in pipelines, the possibility of its application to oil pipelines.
本文简要地论述了高分子聚合物稀溶液管道减阻的特点，并探讨了在输油管道上应用的可能性与存在问题。
In this paper, under the gas-liquid stratified laminar and turbulent flows, and the mixture turbulence flow by aeration in pipe, the laws of drag reduction have been researched.
本文研究了圆管中气液分层层流、分层紊流及掺气混合紊流情况下的阻力减小规律。
The effects of PLMA′s relative molecular mass, content, temperature and flow state on the drag reduction effectiveness and the shear stability were discussed.
考察了其粘均相对分子质量、质量分数、温度及流态对减阻效率、抗剪切稳定性的影响；
This paper introduces the experimental results of influence of two kinds of tail shapes on drag reduction of base bleed and discusses briefly.
介绍了两类不同尾部外形对底排弹减阻性能影响的实验结果，并进行了简要讨论。
This paper presents the general principle and method of bleeding drag reduction characteristic design of base bleed projectile.
本文提出了底部排气弹减阻特性设计的一般原则与方法。
The principle on viscosity drag reduction or magnetic fluid is discussed.
论述了磁性液体粘性减阻技术的原理。
The drag reduction of plane-surfaces with V-shaped grooves is given out by direct numerical simulation, and the drag reduction mechanism in the base of the secondary flow theory is suggested.
利用直接数值模拟方法求得平板上V—型条纹表面上的降阻情况，并给出基于二次流动理论的降阻机理。
It is found that the variation of planforms and geometrical parameters can effect only the drag reduction but little to the low lift in low angle of attack condition.
发现单纯改变涡襟翼的形式和参数能提高减阻效果，但不能改变小迎角下升力过小的现象。
It is found that the variation of planforms and geometrical parameters can effect only the drag reduction but little to the low lift in low angle of attack condition.
发现单纯改变涡襟翼的形式和参数能提高减阻效果，但不能改变小迎角下升力过小的现象。
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