1) drag reducing efficiency
减阻率
1.
The result of drag reducing test in circle conduit showed that the drag reducing efficiency of 40.
01 kg/m3时,减阻率高达40。
2.
The effect of reaction conditions on the drag reducing efficiency of copolymer was investigated and optimum process parameters were obtained.
采用本体聚合法,以TiCl_4/MgCl_2-Al(i-Bu)_3为催化剂对1-辛烯/1-十二烯的长链α-烯烃进行共聚,考察不同的聚合条件对减阻率的影响,最终确定最佳工艺条件,结果表明,当n(Al)/n(Ti)=90、起始反应温度为-2 C、反应物总体积为600 mL、V(DDS)=0。
2) drag reduction efficiency
减阻率
1.
The influence of temperature reactorⅠandⅡon drag reduction efficiency ofα-olefin polymerization was studied systematically.
系统地研究了反应器Ⅰ和反应器Ⅱ的温度对聚α-烯烃合成战阻剂减阻率的影响。
3) drag reduction
减阻率
1.
Effect of electron donor magnesium chloride anhydrous(MgCl2) on drag reduction efficiency of α-olefin polymers is studied by varying conditions of MgCl2 in dosage polymerization,temperature and time.
25 mL、聚合时间24小时的条件下,聚合产物的减阻率达到48%,减阻率比较稳定,能用于工业原油的输送。
4) base drag reduction rate
底阻减小率
5) resistivity reduction
电阻率减小率
1.
The deep lateral resistivities of both the newly drilled side - tracking well and the original hole may reduce differently in producing interval , which is characterized by resistivity reduction.
侧钻后新井眼与原井眼在油层动用井段的深侧向电阻率均有不同程度的降低,用电阻率减小率表示。
6) damping ratio
衰减率;相对阻尼系数,阻尼比,阻尼率
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。 |
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