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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Sail aerodynamics: Understanding pressure distributions on upwind sails
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Sail aerodynamics: Understanding pressure distributions on upwind sails

机译：帆的空气动力学：了解逆风帆的压力分布

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摘要

The pressure distributions on upwind sails is discussed and related to the flow field around the headsail and the mast/mainsail. Pressures measured on several horizontal sections of model-scale and full-scale sails are used to provide examples. On the leeward side of the sails, leading edge separation and turbulent reattachment occurs, sometimes followed by trailing edge separation. On the windward side, leading edge separation occurs on the mast/mainsail and, at low angles of attack, it can also occur on the headsail. Differences were found between the leading edge bubbles on the two sails. Pressure trends for different angles of attack are presented, and these can be explained in terms of standard aerodynamic theory, particularly in terms of short and long leading edge separation bubble types. It was found that the pressure distributions measured on mainsails at full- and model-scale showed good agreement on both the windward and leeward sides.
机译：讨论了迎风帆上的压力分布，并与前帆和桅杆/主帆周围的流场有关。提供了在模型比例尺和全尺寸帆的几个水平截面上测得的压力的示例。在风的下风侧，发生前缘分离和湍流重新附着，有时随后是后缘分离。在迎风侧，前缘分离发生在桅杆/主帆上，在低攻角下，前缘分离也可能发生在前帆上。发现两个帆的前缘气泡之间存在差异。给出了不同迎角的压力趋势，这些趋势可以用标准的空气动力学理论来解释，特别是用短和长的前缘分离气泡类型来解释。结果发现，在主帆上以全尺寸和模型尺寸测量的压力分布在迎风面和背风面均显示出良好的一致性。

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