Abstract
This paper accounts for our ongoing work to evaluate, design and build an optimized wingsail arrangement for one of Åland Sailing Robots’ boats. By examining the current conventional sails of the boat and its propulsion capability, a wingsail arrangement with a similar propulsion capability has been designed and further investigated. The final design has to meet several criteria such as simplicity, reliability, and high degree of autonomous operation. A thorough analysis of the design criteria resulted in the decision to choose a symmetrical, free-rotating wingsail with an additional tail for actuating the wing and controlling its angle of attack. The chosen design is further investigated by using a CFD simulation software. Furthermore, we discuss possible solutions and recommendations regarding the future physical construction of the wingsail.
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Notes
- 1.
To our knowledge, the theoretical prediction of \(C_{L_{max}}\) is still a very hot topic in sophisticated CFD research, and while there are promising results there is not yet a general model which works like the “real world”. Our estimated value \(C_{L_{max}}=0,8\) is based on [8]. Note, however, that this value is only indicative and will guide us to design a first prototype of a wing sail. The wing sails performance in comparison to the soft sail’s has then to be a measure for the reliability of our theoretical assumptions.
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Enqvist, T., Friebe, A., Haug, F. (2017). Free Rotating Wingsail Arrangement for Åland Sailing Robots. In: Alves, J., Cruz, N. (eds) Robotic Sailing 2016. WRSC/IRSC 2016. Springer, Cham. https://doi.org/10.1007/978-3-319-45453-5_1
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