투과성 내부재가 설치된 사각형 탱크내의 슬로싱 해석
Sloshing Analysis in Rectangular Tank with Porous Baffle
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초록
An analytical model of liquid sloshing is developed to consider the energy-loss effect through a partially submerged porous baffle ina horizontally oscillating rectangular tank. The nonlinear boundary condition at the porous baffle is derived to accurately capture both the addedinertia effects and the energy-loss effects from an equivalent non-linear drag law. Using the eigenfunction expansion method, the horizontalhydrodynamic force (added mass, damping coefficient) on both the wall and baffle induced by the fluid motion is assessed for various combinationsof porosity, submergence depth, and the tank's motion amplitude. It is found that a negative value for the added mass and a sharp peak in thedamping curve occur near the resonant frequencies. In particular, the hydrodynamic force and free surface amplitude can be largely reduced byinstalling the proper porous baffle in a tank. The optimal porosity of a porous baffle is near P=0.1.
Abstract
An analytical model of liquid sloshing is developed to consider the energy-loss effect through a partially submerged porous baffle ina horizontally oscillating rectangular tank. The nonlinear boundary condition at the porous baffle is derived to accurately capture both the addedinertia effects and the energy-loss effects from an equivalent non-linear drag law. Using the eigenfunction expansion method, the horizontalhydrodynamic force (added mass, damping coefficient) on both the wall and baffle induced by the fluid motion is assessed for various combinationsof porosity, submergence depth, and the tank's motion amplitude. It is found that a negative value for the added mass and a sharp peak in thedamping curve occur near the resonant frequencies. In particular, the hydrodynamic force and free surface amplitude can be largely reduced byinstalling the proper porous baffle in a tank. The optimal porosity of a porous baffle is near P=0.1.
참고문헌 (15)
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