Accession Number : ADA311749

Title :   Comparative Computational Analysis of Airfoil Sections for Use on Sailing Craft.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Partida, Louis P.

PDF Url : ADA311749

Report Date : MAR 1996

Pagination or Media Count : 69

Abstract : This thesis represents the results of a comparative analysis of current and proposed airfoil sections for use on sailing craft. The primary goal of this report is to develop a sail replacement that functions with the ease and durability of current sailboat sails, yet offers a marked improvement in overall performance, with minimum penalties of weight and construction complexity. State-of-the-art computational methods are utilized to determine the respective aerodynamic characteristics of a mode of a current windsurfer sail section and models of a proposed semi-rigid wing-sail section. Wing-sails offer the same promise of performance gains that modern airfoils have produced in comparison to early thin airfoils. An investigation into differences and possible benefits of the analyzed sections' aerodynamic loading and stall characteristics is made using fully viscous Navier-Stokes Computational Fluid Dynamic codes. Finally a full three-dimensional wing-sail computational model is constructed to identify further areas where sectional improvements would enhance the overall performance of the lifting shape.

Descriptors :   *COMPUTATIONAL FLUID DYNAMICS, *BOATS, *WING BODY CONFIGURATIONS, MATHEMATICAL MODELS, OPTIMIZATION, COMPUTER AIDED DESIGN, GRIDS, SHIP MOTION, THESES, BOUNDARY LAYER, TURBULENT FLOW, ANGLE OF ATTACK, VORTEX SHEDDING, FLOW FIELDS, STALLING, AERODYNAMIC LOADING, WIND VELOCITY, LEADING EDGES, DESIGN CRITERIA, DYNAMIC PROGRAMMING, NAVIER STOKES EQUATIONS, VISCOUS FLOW, VISCOSITY, PRESSURE DISTRIBUTION, AERODYNAMIC LIFT, REYNOLDS NUMBER, SHIP HULLS, LIFT TO DRAG RATIO, THREE DIMENSIONAL FLOW, DRAG REDUCTION.

Subject Categories : Marine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE