セールを対象とした粘性流体中における空力弾性問題

概要

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An important factor in the design of lifting membrane is the accurate determination of its aerodynamic behavior. Recent studies related to membrane wings or yacht sails have introduced iterative coupling of two numerical approaches, i.e., vortex-lattice method (VLM) and finite-element method (FEM) for analysis of the flow fields and the membrane deflection, respectively. Although results presented in the works seem to be promising, VLM is not capable for predicting details of flow including viscous effects and three-dimensional-flow separation. This paper presents a numerical approach to predict aeroelastic behavior of lifting membrane in onset viscous flow, where the flow fields are solved by a RaNS equation method. The fully-elliptic RaNS and continuity equations are solved with a zero-equation turbulence model to provide aerodynamic forces acting on the membrane, and FEM considering large deflection theory with membrane-finite elements is used for estimating elastic characteristics of the membrane.
社団法人日本船舶海洋工学会の論文
1998-09-25