Version 1
: Received: 19 October 2020 / Approved: 20 October 2020 / Online: 20 October 2020 (12:02:42 CEST)
How to cite:
Pham, M.N.; Ryu, I.; Kim, B.; Yang, C. Shape and Spacing Effects on Curvy Twin Sail for Autonomous Sailing Drone. Preprints2020, 2020100411. https://doi.org/10.20944/preprints202010.0411.v1
Pham, M.N.; Ryu, I.; Kim, B.; Yang, C. Shape and Spacing Effects on Curvy Twin Sail for Autonomous Sailing Drone. Preprints 2020, 2020100411. https://doi.org/10.20944/preprints202010.0411.v1
Pham, M.N.; Ryu, I.; Kim, B.; Yang, C. Shape and Spacing Effects on Curvy Twin Sail for Autonomous Sailing Drone. Preprints2020, 2020100411. https://doi.org/10.20944/preprints202010.0411.v1
APA Style
Pham, M.N., Ryu, I., Kim, B., & Yang, C. (2020). Shape and Spacing Effects on Curvy Twin Sail for Autonomous Sailing Drone. Preprints. https://doi.org/10.20944/preprints202010.0411.v1
Chicago/Turabian Style
Pham, M.N., Bugi Kim and Changjo Yang. 2020 "Shape and Spacing Effects on Curvy Twin Sail for Autonomous Sailing Drone" Preprints. https://doi.org/10.20944/preprints202010.0411.v1
Abstract
There is an accelerating requirement for ocean sensing where autonomous vehicles can play an essential role in assisting engineers, researchers, and scientists with environmental monitoring and collecting oceanographic data. This paper is performed to develop a rigid sail for the autonomous sailing drone. Our study aims to numerically analyze the aerodynamic characteristics of curvy twin sail and compare it with wing sail. Because racing regulations limit the sail shape, only the two-dimensional geometry was open for an optimization. Therefore, this study’s first objective was to identify the aerodynamic performance of such curvy twin sails. Simultaneously, a secondary objective was to estimate the effect of the sail’s spacing and shapes. A viscous Navier-Stokes flow solver is used for the numerical aerodynamic analysis. The 2D aerodynamic investigation is a preliminary evaluation. The results have shown that the curvy twin sail designs have improved lift, drag, and driving force coefficient compared to the wing sails. The spacing between the port and starboard sails of curvy twin sail is an important parameter. The spacing is 0.035L, 0.07L, and 0.14L shows the lift coefficient reduction because of dramatically stall effect, while flow separation is improved with spacing is 0.21L, 0.28L, and 0.35L. Significantly, the spacing 0.28L shows the maximum high pressure at the lower area and the small low pressure area at leading edges, so the highest lift is generated.
Keywords
Sailing Drone; Curvy Twin Sail; Driving Force Coefficient; Apparent Wind; Angle of Attack
Subject
Environmental and Earth Sciences, Atmospheric Science and Meteorology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
