The effects of the aerodynamic interaction on the performance of two Flettner rotors
The effects of the aerodynamic interaction on the performance of two Flettner rotors
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DOI：
10.1016/j.jweia.2019.104024
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发表时间：
2020-01-01
影响因子：
4.8
通讯作者：
Huijsmans, R. H. M.
中科院分区：
文献类型：
--
作者：
Bordogna, G.;Muggiasca, S.;Huijsmans, R. H. M.
Flettner转子现已成为风助推进的一种广泛解决方案。为了增加安装它们的船舶的燃料节约，通常使用多个装置。然而，在这些混合动力舰船的性能评估中，目前假设Flettner旋翼独立运行，而不考虑所使用的设备数量及其在舰船甲板上的相对位置。目前的研究涉及一个风洞实验活动，旨在了解气动干扰对两个类似的Flettner转子性能的影响。研究表明，两个Flettner旋翼的气动性能受它们之间的相互作用的影响，通常，当两个装置设置得更接近时，当它们与风向对齐时，这一影响最为明显。结果表明，随视风向的变化，甲板上Flettner旋翼的布置对整个钻机的驱动力系数和横倾力系数有显著的影响。最后，在确定干扰如何影响Flettner旋翼气动性能时，速比起着关键作用。
Flettner rotors are nowadays becoming a widespread solution for wind-assisted propulsion. To increase the fuel savings of the ship on which they are installed, multiple devices are typically used. However, in the performance estimate of these hybrid ships, it is currently assumed that Flettner rotors operate independently, regardless of the number of devices employed and their relative position on the ship's deck. The present investigation deals with a wind-tunnel experimental campaign aimed at understanding the aerodynamic interaction effects on the performance of two similar Flettner rotors. The study indicates that the aerodynamic performance of the two Flettner rotors is affected by their interaction, and, generally, this is most noticeable when the devices are set closer to each other and when they are aligned with the wind direction. It is demonstrated that, depending on the apparent wind direction, the layout of the Flettner rotors on the ship's deck has a remarked influence on the driving and heeling force coefficients of the entire rig. Lastly, the velocity ratio is found to play a key role in the determination of how the interaction affects the Flettner rotor aerodynamic performance.