Showing papers in "Journal of Fluids and Structures in 2003"

TL;DR: In this article, the effects of Reynolds number in the nominal case of an infinitely long and non-confined cylinder in a smooth oncoming flow are discussed, from about Re = 47 to 2 x 10(5), i.e., from the onset of vortex shedding up to the end of the subcritical regime.

TL;DR: In this paper, a harmonically heaving and pitching foil with a superposed pitch bias was evaluated to determine its propulsive efficiency under conditions of significant thrust production, as function of the principal parameters: the heave amplitude, Strouhal number, angle of attack, and phase angle between heave and pitch.

TL;DR: In this paper, the aerodynamic characteristics of two stationary cylinders, both circular and square, in a side-by-side arrangement were investigated experimentally in a uniform flow at a Reynolds number of 5.5×10 4, although the square cylinder results are rather limited.

TL;DR: In this article, the authors studied the response of an elastically mounted cylinder, which is free to move in two degrees of freedom in a fluid flow, and which has low mass and damping.

TL;DR: In this article, an aerodynamic model for flutter and limit cycle oscillations (LCO) of two-dimensional elastic plates in three-dimensional axial flow were observed.

TL;DR: In this article, a vortex method is used to solve the Navier-Stokes equations in the vorticity/stream-function form, and the convection and diffusion equations are solved sequentially at each time step.

TL;DR: An overview of vibration analysis procedures and recommended design guidelines is presented in this article, which pertains to liquid, gas and two-phase heat exchanger such as nuclear steam generators, reboilers, coolers, service water heat exchangers, condensers, and moisture-separator-reheaters.

TL;DR: An overview of vibration analysis procedures and recommended design guidelines for shell-and-tube heat exchangers is presented in this article, where forced vibration excitation mechanisms, vibration response prediction, resulting damage assessment, and acceptance criteria are discussed.

TL;DR: In this article, the in-vacuo dynamic properties of cantilever plates were investigated, such as natural frequencies and mode shapes, of the plates, partially in contact with a fluid.

TL;DR: In this paper, the free-surface flow generated by vertical water entry of two-dimensional symmetric and axisymmetric bodies of arbitrary shape is numerically investigated and compared with available theoretical solutions and experimental data.

TL;DR: In this article, a comprehensive numerical investigation of incompressible flow about fixed cylinder pairs is performed, including tandem, side-by-side, and staggered and Reynolds numbers of 80 and 1000.

TL;DR: In this article, the authors present a review and a numerical study of the fundamental properties of the added mass of a plane flexible plate oscillating in a fluid, where the plate is clamped at one edge and free at the other edges.

TL;DR: In this article, the proper orthogonal decomposition (POD) method is used to extract proper Orthogonal modes that describe the system behaviour from time-series response data.

TL;DR: In this paper, the authors present the measurements of force coefficients and Strouhal numbers on four cylinders in a square configuration at subcritical Reynolds numbers (Re) using a piezo-electric load cell in a wind tunnel.

TL;DR: In this article, a method of exact calculation in terms of a simple recursion is presented, which is valid for transient events only, because the calculation time grows exponentially with the duration of the event.

TL;DR: In this paper, rotational and translational galloping instabilities due to fluid/structure interaction were investigated using a previously developed algorithm using a two-dimensional spectral/hp element method and a frame of reference transformation to ensure efficient computations.

TL;DR: In this paper, the mean and fluctuating velocity fields in the near wake of a circular cylinder subjected to an incident mean flow with periodic velocity perturbations superimposed upon it were examined using laser Doppler anemometry.

TL;DR: In this article, the authors present flutter and forced oscillation experiments in a transonic wind tunnel and demonstrate that very small control forces were sufficient to excite or suppress flutter oscillations.

TL;DR: In this paper, the effects of tripping rods on flow characteristics and fluid forces acting on a single cylinder and on two cylinders in side-byside and tandem arrangements were investigated in a smooth cross stream at a Reynolds number of 5.5×10 4.

TL;DR: In this article, the flow around four cylinders in a square configuration with a spacing ratio of 4 and at a Reynolds number of 200 were investigated using laser-induced fluorescence (LIF) visualization and particle image velocimetry (PIV) for angles of incidence ranging from 0° to 45° at a 5° interval.

TL;DR: In this article, the possible drag reduction and the corresponding variation of the flow field around a circular cylinder are studied in a wind tunnel using flow control with acoustic excitation, which is supplied internally through a slit to the flow over the cylinder.

TL;DR: In this paper, the authors investigated the effects of fully turbulent inflow past a shallow cavity on the configuration of an axisymmetric cavity mounted in a pipe and provided evidence that pronounced flow tones can be generated from a fully turbulent flow at very low Mach number.

TL;DR: In this article, the authors developed mathematical formulations for large strain analysis of extensible flexible marine pipes transporting fluid in two different coordinates: Cartesian and natural coordinates, in which deformation descriptions based upon the total Lagrangians, the updated Lagrangian, and the Eulerian mechanics are taken into consideration.

TL;DR: In this article, a vertical surface-piercing circular cylinder with a large draught was towed at steady speeds through water initially at rest, and measurements were made of pressures around its circumference at elevations between 2.4d below still water level to 0.7d above, at Froude numbers up to 1.67.

TL;DR: In this paper, a cascade of NACA-5506 airfoils is numerically investigated to show that reduced order models with only 35 degrees of freedom accurately predict the unsteady response of the full model with approximately 6000 degrees offreedom in the subsonic regime, for a broad range of Mach numbers.

TL;DR: In this article, a cavity mounted on the wall of a duct was investigated to investigate the effect of "confinement" on the aeroacoustic response of shallow cavities in low Mach number flow.

TL;DR: In this article, an experimental investigation was conducted of a circular cylinder immersed in a uniform planar shear flow, where the approach velocity varies across the diameter of the cylinder, and the dimensionless shear parameter ranged from K=0.02 to 0.07, which corresponds to a flow with low to moderate shear.

TL;DR: In this article, a 2D hybrid vortex computation scheme was used to study the cause of the hysteresis phenomenon in the variation of the cylinder's galloping amplitude with the flow velocity, and it was shown that the well known point of inflection which exists in the side force (C y ) versus α plots at high Reynolds number only occurs at Re=1000, α =4° in the present numerical simulation.

TL;DR: In this article, the authors present a technique to perturb interactions between vortex shedding from a bluff body and vortex-induced vibration of the body, with a view to provide a possible control of both flow and structural vibration.