Recent Development of Drag Reduction Technologies via Boundary Layer Control
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摘要: 船舶及水下航行器减阻技术一直备受关注,通过控制其壁面边界层的流态是实现减阻的有效途径之一。该文对当前世界范围内边界层控制法减阻技术进行了整理和归纳,着重介绍了肋条减阻、柔顺壁减阻和疏水减阻3种减阻技术的含义和研究现状,并分别对其减阻机理进行了系统分析,同时简要介绍了气幕减阻、壁面吸入法以及壁面加热和冷却法等其他减阻技术。最后,针对目前研究中存在的不足,提出应重视减阻机理研究、多种减阻方式相结合以及理论研究与工程应用相结合的几点建议。Abstract: The technology of drag reduction in ships and underwater vehicles is well concerned in recent years. One of the effective ways to reduce drag is to control the flow pattern at wall boundary layer. This paper sums up the current drag reduction technologies via boundary layer control in the world, introduces the research on drag reduction by riblets, compliant coating and hydrophobic coat, and analyzes their mechanisms. It also describes drag reduction by microbubbles, wall absorbing, and wall heating & cooling. Finally, it presents three suggestions as follows: making great effort to research drag reduction mechanism, integrating different methods of drag reduction, and combining theoretical research with engineering application.
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