An analytical procedure is presented to evaluate the fluid sloshing characteristics in a two-dimensional(2D)rectangular container with a bottom-mounted T-shaped baffle.The fluid region is divided into several sub-doma...An analytical procedure is presented to evaluate the fluid sloshing characteristics in a two-dimensional(2D)rectangular container with a bottom-mounted T-shaped baffle.The fluid region is divided into several sub-domains with hypothetical interfaces and the velocities and pressures of the fluid on adjacent interfaces should be identical.The separation of variables in conjunction with the superposition principle is employed to formulate the velocity potential of each sub-domain.The Fourier series expansion is used to derive the eigenvalue equation by substituting the velocity potential solutions into the free surface conditions and the continuity conditions on adjacent interfaces.Under the horizontal base excitation,the total velocity potential of fluid is decomposed of the impulsive and perturbed velocity potentials.The orthogonality of the sloshing modes is demonstrated by implementing Gauss formula.The dynamic response equation is established by incorporating the total velocity potential solution into the surface wave equation.Excellent agreements are achieved between the present results and those from the reported literature and finite element code.Numerical results are exhibited to reveal the effect of the baffle parameters and excitation frequency on sloshing characteristics and responses of liquid.展开更多
Given the complex flight mission and structural characteristics of special-shaped tanks in new-generation space vehicles,this study investigates the sloshing characteristics and suppression methods of liquid propellan...Given the complex flight mission and structural characteristics of special-shaped tanks in new-generation space vehicles,this study investigates the sloshing characteristics and suppression methods of liquid propellant.Initially,the numerical calculation and structural suppression approaches for liquid propellant periodic sloshing are introduced.Subsequently,a new equivalent dynamic analysis approach based on the Volume of Fluid(VOF)method is presented and validated to simulate liquid sloshing and determine dynamic characteristic parameters such as sloshing mass,frequency,and damping ratio.Furthermore,antisloshing baffles are designed for sloshing suppression,and the influence of baffle height on sloshing frequency and damping ratio is examined.These significant findings provide crucial references and foundations for enhancing the flight stability and reliability of the attitude control system in new-generation space vehicles.展开更多
基金The study was financially supported by the National Natural Science Foundation of China(Grant No.51978336)the Science and Technology Project of Water Resources Department of Jiangsu Province(Grant No.2021022).
文摘An analytical procedure is presented to evaluate the fluid sloshing characteristics in a two-dimensional(2D)rectangular container with a bottom-mounted T-shaped baffle.The fluid region is divided into several sub-domains with hypothetical interfaces and the velocities and pressures of the fluid on adjacent interfaces should be identical.The separation of variables in conjunction with the superposition principle is employed to formulate the velocity potential of each sub-domain.The Fourier series expansion is used to derive the eigenvalue equation by substituting the velocity potential solutions into the free surface conditions and the continuity conditions on adjacent interfaces.Under the horizontal base excitation,the total velocity potential of fluid is decomposed of the impulsive and perturbed velocity potentials.The orthogonality of the sloshing modes is demonstrated by implementing Gauss formula.The dynamic response equation is established by incorporating the total velocity potential solution into the surface wave equation.Excellent agreements are achieved between the present results and those from the reported literature and finite element code.Numerical results are exhibited to reveal the effect of the baffle parameters and excitation frequency on sloshing characteristics and responses of liquid.
文摘Given the complex flight mission and structural characteristics of special-shaped tanks in new-generation space vehicles,this study investigates the sloshing characteristics and suppression methods of liquid propellant.Initially,the numerical calculation and structural suppression approaches for liquid propellant periodic sloshing are introduced.Subsequently,a new equivalent dynamic analysis approach based on the Volume of Fluid(VOF)method is presented and validated to simulate liquid sloshing and determine dynamic characteristic parameters such as sloshing mass,frequency,and damping ratio.Furthermore,antisloshing baffles are designed for sloshing suppression,and the influence of baffle height on sloshing frequency and damping ratio is examined.These significant findings provide crucial references and foundations for enhancing the flight stability and reliability of the attitude control system in new-generation space vehicles.
