特定结构振源振动时流体表面波的定向吸引作用

发布时间：2018-05-28 23:25

本文选题：海洋工程 + 振源结构　；参考：《石油勘探与开发》2016年05期

【摘要】：实验中发现三棱柱体在流体表面作低频小幅简谐振动时激发的表面波对漂浮物有定向吸引作用,针对此现象进行了系统实验和深入研究,分析了不同结构振源振动引起的流体表面波动的特性。开展了三棱柱体、四棱柱体、六棱柱体和圆柱体作为振源的实验。结果表明正对棱柱体棱边方向的表面波对漂浮物有吸引作用,而正对棱柱体柱面方向的表面波对漂浮物有排斥作用。吸引作用的大小与棱角的尖锐程度呈非线性关系,棱角越尖锐吸引作用越强。当振源为圆柱体即棱角消失时,表面波对漂浮物没有定向吸引作用。实验发现并验证了特定结构振源振动时产生的流体表面波具有定向吸引作用,研究成果可为水面污染物清理、海上溢油收集等工程应用问题提供帮助。
[Abstract]:It is found in the experiment that the surface wave excited by the triangulated cylinder acting on the surface of the fluid with low frequency and small harmonic vibration has a directional attraction to the floating object. In view of this phenomenon, a systematic experiment and a thorough study have been carried out. The characteristics of fluid surface fluctuation caused by vibration of different structures are analyzed. The experiment of triangulated cylinder, four-prism cylinder, hexagonal cylinder and cylinder as vibration source was carried out. The results show that the surface waves in the prism edge direction attract the floating object, while the surface wave in the prism cylinder direction repels the floating object. The magnitude of the attraction is nonlinear to the sharp degree of the angle, and the sharper the angle is, the stronger the attraction is. When the vibration source is a cylinder, the surface wave has no directional attraction to the floating object. The experimental results show that the fluid surface waves produced by the vibration source of a specific structure have directional attraction, and the research results can be helpful for engineering applications such as surface pollutant cleaning and oil spill collection at sea.
【作者单位】：北京信息科技大学理学院;中国石油大学(北京)国家安全生产监督管理总局油气安全工程技术研究中心;中国科学研究院力学所;
【基金】：国家科技重大专项(2011ZX05027-005-001)
【分类号】：O352

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