2) drag-reducing fluid
减阻流体
1.
Heating transfer enhancement to surfactant drag-reducing fluid with mesh-screen in the duct;
添加网格对增强表面活性剂减阻流体传热性能的试验研究
2.
The results indicate that the heat transfer reduction rate of the CTAC drag-reducing fluid increases with Reynolds number when Reynolds number is below the critical value and decreases rapidly when Reynolds number exceeds the critical value,the trends of heat transfer .
对不同工况下不同浓度和配比的CTAC减阻流体在二维流道中的减阻性能和传热性能进行了试验测试。
3.
The effect of concentration,mixture ratio,Reynolds number and heat flux of CTAC surfactant drag-reducing fluid has been investigated in a two-dimensional channel by using pressure difference transducer and temperature measuring system.
针对在水中添加表面活性剂可以出现阻力系数减少而同时传热性能发生变化的现象,采用测压差装置和热电偶测温系统分别对二维流道内不同的减阻流体的减阻性能、传热性能进行了试验,研究了浓度、配比、雷诺数和热流密度对减阻流体传热与阻力系数之比值的影响。
3) drag-reducing flow
减阻流体
1.
The turbulence characteristics of a surfactant solution in changing from drag-reducing flow to turbulent flow inside two-dimensional smooth channel and in changing from mesh plug were investigated through phase Doppler anemometry (PDA) and particle image velocimetry(PIV) system.
应用相位多普勒测速仪(PDA)和粒子图像测速仪(P IV)对添加筛网后的十六烷基三甲基氯化铵(CTAC)减阻流体湍流流场进行试验研究,得到了减阻流体的速度脉动分布以及在筛网后不同位置的减阻流体湍流速度分布和平均速度分布。
2.
The turbulence characteristics of a surfactant solution in changing from drag-reducing flow to turbulent flow inside two-dimension smooth channel and in changing from mesh plug were investigated through PIV (Particle Image Velocimetry) system in this study.
应用粒子图象测速仪对添加筛网后的CTAC(CetyltrimethylAmmoniumChloride)减阻流体湍流流场进行试验研究,得到了在筛网后不同位置的减阻流体湍流速度分布和平均速度分布。
3.
It is also astonished to find that a series of local maximal values appear in the profiles of RMS of streamwise velocity fluctuations which indicates the high fluctuation layers are ubiquitous in drag-reducing flow.
该文采用粒子图像测速仪对矩形槽道内减阻流体二维流场进行测量,采用小波分析方法将流场分解为平均速度场与7个不同尺度的脉动场。
4) drag reducing fluid
减阻流体
1.
Drag reducing performances of Cetyltrimethyl Ammonium Chloride (CTAC) drag reducing fluid in two-dimensional channel under different experimental situations were measured.
通过对不同工况下氯化十六烷基三甲基季铵盐(CTAC)减阻流体在二维流道中减阻性能的测定,分析了温度、质量分数、配比变化对流体减阻性能的影响。
2.
With an experiment, tests performance of cetyltrimethyl ammonium chloride drag reducing fluid in water system.
结合实验对CTAC减阻流体在流道中的减阻性能作了测试 ,分析了温度、浓度、配比变化对流体减阻性能的影响 ;应用激光相位多普勒测速仪测量了流体的速度场。
3.
An experimental study was conducted of the turbulent flow field of a CTAC drag reducing fluid in a two dimensional flow channel with the use of PIV (particle image velocimetry) and PDA (Phase Doppler Anemometry).
本文应用PIV(ParticleImageVelocimetry)和PDA(PhaseDopplerAnemometry)在二维流道内对CTAC(CetyltrimethylAmmoniumChloride)减阻流体湍流流场进行试验研究,得到减阻流体湍流速度分布。
5) flow drag reduction technology
流体减阻技术
补充资料：高分子减阻剂
| 高分子减阻剂 polymeric drag-reduction additives 具有减小流体流动阻力作用的高分子。在流体输送过程中加入此类高分子，能减少转展阻力，降低能耗。水相输送减阻剂研究开发较早，已研究了大量的水溶性高分子减阻剂，使用量仅几个ppm就可降低50％以上的阻力，有时高达80％。高分子减阻剂的结构及性质是：高分子具有无支链结构，分子量高，溶解性好等。聚环氧乙烷、聚丙烯酰胺是良好的水相减阻剂。油相减阻剂具有重要的实际意义，原油多以管道输送。由于粘度大、摩擦力高，输送中消耗也高，已应用的油相减阻剂有聚异丁烯、氢化聚异戊二烯、无规聚丙烯、丁二烯及苯乙烯的嵌段共聚物、乙烯与乙烯基酯的共聚物聚丙烯酰胺、乙烯和丙烯的共聚物等。如氢化聚异戊二烯，一般用量2～20ppm，即可使流速增加，摩擦损耗降低27％到50％。高分子减阻剂已广泛用于灌溉、泄洪、消防、原油输送等方面。其缺点是价格贵、易降解等。 |
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条