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.
随着石油工业的发展，超高分子量聚合物作为原油输送减阻剂在国内外输油管线中得到日益广泛的应用。
参考来源 - 高分子减阻剂的性能评价The experimental & theoretical research progress of air injection drag reduction techniqUe is briefly introduced in this paper. It is worthwhile to make efforts on the research of that technique.
本文从试验研究、理论探讨及实船开发三个方面，简要地介绍了气幕减阻技术的研究状况，指出这项技术值得大力研究开发，并提出了有待深化研究的问题。
参考来源 - 气幕减阻研究进展Based on Lin li ming' s research, this paper discuses the friction reduction by microbubble on a plat-bottom ship.
本文在林黎明研究的基础上进行船舶微气泡减阻的数值计算。
参考来源 - 船舶微气泡减阻数值模拟The results of the numerical simulation showed that if we fixed a stick with a small diameter into the cyclone separator,the pressure drop didn't change so much.
数值模拟结果表明:杆径较小的减阻杆的减阻效果不是太好,随着减阻杆直径的增加,分离器的压降有一定幅度的下降,继续增加减阻杆直径的时候,分离器的运行阻力变化不大;同时分离效率会有一定程度的降低,总体降低幅度在5个百分点之内。
参考来源 - 内置减阻杆扩散式方形分离器内两相流数值模拟·2,447,543篇论文数据，部分数据来源于NoteExpress
阶背式轿车队列的平均减阻率最大。
The drag reduction of the notchback car platoon is the most.
人们曾尝试利用多种主动控制方法减少壁面阻力，获得了不同的减阻效果。
Various active control strategies had been used to reduce skin friction, which achieved different results.
通过水槽和水洞的实验，研究了超疏水性表面在不同流动条件下的减阻特性。
The last, through experiments of flume and water tunnel, the liquid slip effect on drag-reduction over super -hydrophobic surface for various flow conditions was researched.
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