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CFD approach to modelling, hydrodynamic analysis and motion characteristics of a laboratory underwater glider with experimental results

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Journal of Ocean Engineering and Science 2017年第2期2卷 90-119页

作者： yogang singh S.K.Bhattacharyya V.G.Idichandy Department of Ocean Engineering Indian Institute of Technology-MadrasChennaiIndia

Underwater gliders are buoyancy propelled vehicle which make use of buoyancy for vertical movement and wings to propel the glider in forward *** underwater gliders are a patented technology and are manufactured and marketed by *** this study,we validate the experimental lift and drag characteristics of a glider from the literature using Computational fluid dynamics(CFD)*** approach is then used for the assessment of the steady state characteristics of a laboratory glider designed at Indian Institute of Technology(IIT)*** behaviour and lift and drag force distribution at different angles of attack are studied for Reynolds numbers varying from 10^(5) to 10^(6) for NACA0012 wing *** state variables of the glider are the velocity,gliding angle and angle of attack which are simulated by making use of the hydrodynamic drag and lift coefficients obtained from *** effect of the variable buoyancy is examined in terms of the gliding angle,velocity and angle of *** model of glider is developed from the final design asserted by *** model is used for determination of static and dynamic properties of an underwater glider which were validated against an equivalent CAD model and simulation results obtained from equations of motion of glider in vertical plane *** the literature,only empirical approach has been adopted to estimate the hydrodynamic coefficients of the AUG that are required for its trajectory *** this work,a CFD approach has been proposed to estimate the hydrodynamic coefficients and validated with experimental data.A two-mass variable buoyancy engine has been designed and *** equations of motion for this two-mass engine have been obtained by modifying the single mass version of the equations described in the *** objectives of the present study are to understand the glider dynamics adopting a CFD approach,fabricate the glider and its variabl

关键词： AUG CFD Drag Glider Underwater glider Variable buoyancy engine

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