1) drag reduction
壁面减阻
2) Wall
壁面
1.
Effect of Wall on Mass Transfer Coefficient of Hollow Fiber Dialyzers;
壁面对中空纤维透析器传质系数的影响
2.
The law of the bubble motion near the wall;
近壁面气泡的运动规律研究
3.
Based on the assumption of potential flow,the coupled numerical model of bubble and wall is built and the model is calculated with boundary integral method and three-dimensional computing program is developed.
基于势流假设,建立气泡与壁面耦合数值模型,运用边界积分法求解,开发了三维计算程序,计算值与实验值吻合良好。
3) wall slip
壁面滑移
1.
Effects of temperature,solid particle size and concentration on wall slip behavior of coal-water slurry in pipelines;
温度和固相粒径与浓度对水煤浆管内流动壁面滑移的影响
2.
The role of pressure-dependent wall slip in the generation of hydrodynamic pressure in a sliding gap;
压力相关的壁面滑移在滑动间隙流体动压力产生中的作用(英文)
3.
Based on the analyses of wall slip mechanism of polymer melt flowing,the effects of wall slip on melt filling flow behavior in micro injection molding were investigated.
分析了微尺度下熔体壁面滑移机理,研究了微注塑成形中壁面滑移对熔体充模流动行为的影响。
4) surface of mould cavity
型腔壁面
1.
The process of mould filling for the flat plastic products with local sunk was investigated; an equation to calculate the side force on core protruding which causes fatigue stress craze on surface of mould cavity was formulated.
研究具有局部凹陷结构的板状制品注塑模具型腔的熔体充模过程,得出导致型腔壁面疲劳应力开裂的型芯凸块侧推力计算公式。
5) effect of wall
壁面影响
6) wall material
壁面材质
1.
Some reasons of potassium nitrate fouling are analyzed, selection of suitable wall material, and multi items of preventing measures such as reducing the impurity contents, increasing the ratio of NH + 4/K + in the solution, controlling the proper cooling speed and the agitation rotation speed etc.
分析了硝酸钾结垢的诸多原因 ,提出了选择合适的壁面材质、减少杂质含量、提高溶液中NH+ 4 /K+ 比值、控制合适的冷却速度与搅拌转速等项防治措
参考词条
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。