Comparative Investigation of an Automated Oceanic Wave Surface Glider Robot Influence on Resistance Prediction Using CFD Method

Abstract:

The wave glider is composed of two parts: the float is roughly the size and shape of a surfboard that contains all the instrumentation needed for scientific experiments; the sub has wings and hangs 6 meters below on an umbilical tether. This difference allows wave energy to be harvested to produce forward thrust. According to the lake of design information and data for the wave glider, the main aim of the study is using computational fluid dynamics (CFD) to present a method to predict calm water resistance for the floating part of the wave glider (the hull). Wigley parabolic hull and high speed round bilge form (NPL) have been investigated in order to estimate the hydrodynamic performances of the hull using CFD software fluent. Wave glider is designed with slender hull shapes in order to decrease the wave making resistance of the ship.In this paper a method is evaluated by comparing the numerical predictions for wigley and NPL forms (2m) using the same mesh generation method under the same conditions to design the hull. Calculations for total calm water resistance are carried out using three different mesh sizes for Froude numbers in the range of 0.10 to 0.40 and compared for accuracy of the solution parameters. The close agreement between the numerical predictions shows the importance of CFD applications in estimating the hydrodynamics performance to design the floating hull and the numerical method is useful in glider design. This means that the method discussed in this paper can be used for the resistance calculation of some hulls like the float of the glider.

• Periodical: Applied Mechanics and Materials (Volume 710)
• Pages: 91-97
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.710.91
• Online since: January 2015
• Authors: Aladdin Elhadad*, Wen Yang Duan, Rui Deng
• Keywords: Calm Water Resistance, CFD, NPL, Wave Glider, Wigley Parabolic Hull

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