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UV grafting process for synthetic drag reduction of biomimetic riblet surfaces

机译:紫外线接枝工艺可降低仿生肋条表面的合成阻力

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Skin-friction drag accounts for a large portion of resistance encountered by water-based vehicles, such as ships and submarines. Developing drag reduction methods to improve drag reduction performance has drawn worldwide attention recently. UV-induced polymerization has been investigated as a way to graft the drag reduction agent PAM on to a PVC substrate with a biomimetic riblet surface. The effects of AM concentration and irradiation time on the grafting rate were explored to determine optimal grafting parameters. UV grafting polymerization was clarified by comparing the peak absorption variation of the infrared spectrum before and after grafting. The PAM thin film grafted on riblet surface was measured approximately 10 mm in thickness. A rotating disk apparatus was built to measure the synthetic drag reduction performance. The drag reduction rate of the grafted PAM riblet surface was tested at approximately 14%, higher than the 6% of the traditional riblet surface. Moreover, the excellent drag reduction performance of grafted PDMS riblet surface lasted for 12 days. (C) 2015 Wiley Periodicals, Inc.
机译:皮肤摩擦阻力是船舶和潜艇等水基车辆遇到的大部分阻力。开发改善减阻性能的减阻方法最近引起了全世界的关注。已经研究了紫外线诱导的聚合反应,将减阻剂PAM接枝到具有仿生肋条表面的PVC基材上。探索了AM浓度和辐照时间对接枝率的影响,以确定最佳的接枝参数。通过比较接枝前后红外光谱的峰值吸收变化,可以明确UV接枝聚合。接枝在肋状表面上的PAM薄膜的厚度约为10毫米。构建旋转盘设备以测量合成减阻性能。经测试,接枝的PAM肋条表面的减阻率约为14%,高于传统肋条表面的6%。此外,接枝的PDMS肋条表面出色的减阻性能持续了12天。 (C)2015年Wiley Periodicals,Inc.

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