• With the rapid development of petroleum industry, high molecular polymers as drag reduction agents (dra) have been widely used in conduits during the transportation of crude oil.

    随着石油工业发展超高分子量聚合物作为原油输送减国内外输油管线得到日益广泛应用

    dict.cnki.net

  • 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.

    提出机理工程方法实现粘度流体阻力管道输送具有重要理论指导意义工程应用价值

    dict.cnki.net

  • 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方法及其机理,联系了水相、油相中节约能源材料提高速度效率等方面应用

    dict.cnki.net

  • The results are meaningful for explaining the mechanism of drag reduction from submicroscopic level.

    所得结果对于亚微观层次解释机理实际意义

    dict.cnki.net

  • 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研究集中试验方面理论分析数值计算进行不多

    www.dictall.com

  • 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溶液管道特点,并探讨了输油管道上应用可能性与存在问题。

    dict.cnki.net

  • 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不仅具有较好的效果能力,提高了输送的经济效益同时保证输油生产安全平稳运行

    www.chemyq.com

  • 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.

    目前一领域研究目标不断提高效率同时尽量增强剪切稳定性降低使用成本

    dict.cnki.net

  • Working area for drag reduction agents (dra) is in turbulence area, and it can reduce resistance as well as increase transportation effectively.

    作用区域流体的湍流有效降低流体阻力增加流量

    www.dictall.com

  • The laboratory evaluation method and apparatuses on drag reduction, viscosity reduction and anti-wax for the internal wall coating and additives of pipeline of crude oil were summarized.

    随着人们对原油研究深入,实验室评价装置性能测试方法也将进一步得到完善发展。

    www.dictall.com

  • The degradation of the polymer and its effect on the drag reduction are also discussed.

    讨论聚合物降解情况减阻影响

    dict.cnki.net

  • The experimental results of the effect of base bleed propellant composition on the aerodynamic performance of drag reduction and range increase of base bleed projectile.

    介绍了药剂成份排弹气动力性能影响实验结果

    www.dictall.com

  • The technology of drag reduction can reduce consumed energy by water pump, so it is would be used widely in energy conservation.

    技术集中供热及空调输配系统的应用可以极大降低从而具有广阔节能前景。

    dict.cnki.net

  • More mature drag reduction tools have been developed abroad, but the domestic drag reduction tool research and development is still in its infancy.

    国外已有较为成熟工具国内工具研发工作处于起步阶段。

    html.rhhz.net

  • 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.

    建立自己流动显示的基础上,提出了新的机理改进设计,并获得较好的效果

    dict.cnki.net

  • 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.

    结合室内模拟评价装置测定聚合物性能确定DDS作为给电子聚合活性中心数量分布调变作用

    dict.cnki.net

  • 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.

    本文研究了圆中气液分层层流分层紊流混合紊流情况阻力减小规律

    dict.cnki.net

  • Abstr: Bionic surface drag reduction is a very promising drag reduction way at all drag reduction techniques.

    文章摘要仿生表面众多方法中非常有前景方式

    www.redlib.cn

  • The experiment shows that it can drag reduction and extend the discharge distance of pipeline transportation by ejecting compressed air to dredger pipeline.

    分析了管道输送机理延长效果,在模型试验基础上进行实船试验

    www.dictall.com

  • It is employed the concept of multi-scale coherent structures to study the mechanism of riblet surface drag reduction in turbulent boundary layer.

    湍流多尺度相干结构概念引入沟槽壁面湍流边界层机理研究

    www.boshuo.net

  • The adding of the drag reduction agent can reduce the friction force of the current and increase the flow speed as well as increase the conveying distance.

    引入后,降低湍流磨擦阻力提高流速增大输送距离提高管道输送能力。

    ip.com

  • This paper presents the general principle and method of bleeding drag reduction characteristic design of base bleed projectile.

    本文提出底部排气特性设计一般原则方法

    dict.cnki.net

  • The effects of PLMA′s relative molecular mass, content, temperature and flow state on the drag reduction effectiveness and the shear stability were discussed.

    考察了相对分子质量质量分数、温度效率剪切稳定性影响

    dict.cnki.net

  • This paper gives the experimental approach primarily in wind tunnel to the new concept of surface drag reduction on turbulent flow.

    本文当今湍流表面摩擦概念进行初步风洞实验探索

    dict.cnki.net

  • The effects of the tip shape of V-groove on drag reduction and flow field characteristics by numerical analysis;

    近年来对于水下条纹沟槽表面研究集中在试验方面,理论分析数值计算进行却不多。

    www.dictall.com

  • It presents the influences of ejection parameter, freestream Mach number, boattail angle and length of model, geometric size of jet hole, as well as model rotary speed on drag reduction rate.

    给出喷射参数、来流M模型船尾船尾、排气口直径、模型转速参数对底排影响

    dict.cnki.net

  • Internal coating used in high pressure, large diameter and long distance gas pipeline has two main functions, one of them is anti corrosion and the other is drag reduction.

    高压口径天然气管道采用涂层主要具有两大功能防腐蚀

    www.chemyq.com

  • Considering the results of leading edge holes examples should be compared with experimental results, and further studies to determine the key parameters of the effective drag reduction.

    考虑引流方案有关计算结果模型实验结果进行对比分析进一步研究确定有效关键参数

    www.fabiao.net

  • Considering the results of leading edge holes examples should be compared with experimental results, and further studies to determine the key parameters of the effective drag reduction.

    考虑引流方案有关计算结果模型实验结果进行对比分析进一步研究确定有效关键参数

    www.fabiao.net

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