减阻作用

利用ARES流变仪对具有湍流减阻作用的阳性界面活性剂CTAC/NaSal水溶液的剪切黏度进行了测量。

The shear viscosities of a turbulence drag-reducing cationic surfactant solution , cetyltrimethyl ammonium chloride ( CTAC ) / sodium salicylate ( NaSal ) aqueous solution were measured with ARES rheometer .

XC的长链状双螺旋结构使其具有减阻作用，使钻井液在水平段始终处于紊流状态，阻止了水平段岩屑床的形成；

Because of long chain couple helix composition of XC , XC can drag reduction , make drilling fluid keep disturbed flow condition in horizontal section , and stop cutting bed formation .

试验结果证实了理论预测的有减阻作用的柔性壁构造特征。

These results confirmed the predicted characteristics of appropriate compliant surfaces .

树脂涂层对原油输送管道的壁面减阻作用

Drag reduction of resin coatings on pipe wall in crude oil transportation

层流附面层粘性减阻作用分析

Analysis of Laminar Sublayer Viscous Drag Reduction in Water Pipe-flow

动物皮毛柔性减阻作用的试验研究

Experimental Study on Effect of the Resistance-Reducing of the Animal Fur Flexibility

聚合物稀溶液紊流减阻作用机理综述

Review of drag reduction mechanisms for polymer dilute solution

实验结果表明柔性壁面具有一定的减阻作用。

The experimental results confirm the effect of drag reduce for compliant coating surface of turbulent boundary layer .

计算结果表明，采用零质量射流进行主动流动控制能有效抑制大攻角下大尺度的流动分离，改善翼型的气动特性，起到显著的增升减阻作用。

The results show that active flow control can enhance aerodynamic performance by reducing the adverse effects of separated flow .

研究结果表明，微型梯形涡流发生器对超临界机翼附面层分离的控制主要起减阻作用；

The results indicate that the principal effect of micro-trapezoid vortex generator is drag saving for boundary layer separation control of supercritical wing .

平板模型的阻力测量结果表明，柔性表面在一定的速度范围内有明显的减阻作用。

The results of the measured drags of the flat plate model showed that the compliant surface was capable of reducing drag in a certain range of speeds .

含水率比较高时，温度对粘度的影响非常小，提高温度对于降粘和减阻作用小。

Temperature has little influence on viscosity when water content is relatively high and the increase of temperature has little function on reducing viscosity and dragging resistance . 4 .

块状崩塌土快速加载使其与下垫层之间出现超载孔隙水压力，且不能及时消散，减小了块体的有效重量，达到了减阻作用，其流动化机理为压差减阻。

The supernormal pore water pressure between the block avalanche soils and underlay reduces the weight of block avalanche soils as well as the resistance between the block avalanche soils and underlay .

模拟结果表明：在中低矿化度下，泥质对岩石导电整体上呈现减阻作用，随着泥质含量的增加，电阻率降低的速度减慢；

The simulation results show that under middle-low salinity the shale effect on rock electrical properties is manifested by resistivity reduction . With the increasing of the shale content , the speed of the resistivity decreasing is slowing .

注入方式对减阻剂作用的影响

Influence of Injection Patten on the Action of Drag Reducing Agent

压差流阻测试装置研制及涂层减流阻作用研究

The Design of Testing Equipment for Drag Resistance Effect Based on Differential Pressure Principle and the Study of Drag Reduction Characteristic of Coatings

介绍了EP系列减阻剂的作用机理、研制方法、中试生产和现场实验的概况。

The mechanism , development , pilot testing and field test of EP DRA are introduced .

减阻剂的作用区域在流体的湍流区，它能有效的降低流体阻力增加流量。

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

其结果显示纤维粒子在流动中起到了抑制湍动并减阻的重要作用，这种作用的影响随着纤维质量浓度的增加而增大。

The result reveals that the fibers play a significant role in suppressing the turbulence and reducing the drag . Such role becomes more obvious with increasing of the fiber mass concentration .