Effects of Sloshing on Flutter Prediction of Liquid-Filled Circular Cylindrical Shell

Sloshing effects on supersonic flutter characteristics of a circular cylindrical shell partially filled with liquid

“…To this end, the variation of complex frequencies consisting of the real and imaginary parts versus freestream static pressure for a 60%‐filled simply supported circular cylindrical shell is plotted in Figure . The same test case as used by Sabri and Lakis is considered here for the sake of comparison. The geometrical and material parameters of the simply supported circular cylindrical shell as well as the airflow conditions are identical to those given in Section 5.1.2 as Case I.…”

“…It is pertinent to note that the results illustrated in Figure are computed without taking into account the initial geometric stiffness matrix caused by the presence of fluid hydrostatic pressure, P 0 , in the initial state due to the fact that this pressurized configuration has not been considered in the work of Sabri and Lakis …”

“…Their results demonstrated that the influence of the fuel, even if the influence of the fuel added mass was overlooked, extended the flutter boundary at transonic speeds. On the basis of a search of the literature, the work conducted by Sabri and Lakis is the only one that has attempted to investigate the supersonic flutter of a circular cylindrical shell under the effect of sloshing of an internal fluid. They developed a hybrid FEM to predict the supersonic flutter of a partially liquid‐filled circular cylindrical shell by considering liquid sloshing.…”

“…Therefore, the main aim of the present work is to revisit the effect of liquid sloshing on the supersonic flutter of a circular cylindrical shell. This task has been achieved by using a higher‐fidelity model of the FSI system than the one utilized by Sabri and Lakis . To this end, a computational model within the framework of the FEM is developed to capture FSIs arising from the sloshing of the internal fluid and the flexibility of its containing structure exposed to an external supersonic flow.…”

Aeroelastic stability of cylindrical shells interacting with internal annular fluid flow

“…On the one hand, depending on the prescribed boundary conditions and flow velocity a combined action of both flows might be of additive nature, providing a strong destabilizing effect on the examined system and, on the other hand, might enlarge the stability boundaries [3][4][5][6]. However, in recent years there have been a number of publications, in which the aeroelastic stability is studied taking into account the influence of a quiescent liquid with a free surface located inside the shell or at its outer surface [7][8][9][10]. The panel flutter of isotropic and heated functionally-graded cylindrical shells completely filled with a quiescent or flowing ideal liquid has been analyzed in our recent papers [11,12].…”