1-20 of 205
Keywords: vortex
Close
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-3209
... considered to figure out how the focused wave interact with moving cylinder as well as how speed and distance affect the result. The correlation between vortex shedding and free surface is also discussed. INTRODUCTION With the development and utilization of ocean resources, there are more and more...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-3158
... Eddy Simulation (LES) turbulence model was used for numerical simulation. The hydrodynamic performance of the vane wheel at different rotational speed was calculated. At the same time, the vortex shape, pressure distribution and the flow field behind the propeller and vane wheel were analyzed. The...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-3264
... We present results from large-scale towing-tank tests conducted to explore the use of jets to suppress the vortex shedding from a circular cylinder immersed in a uniform turbulent stream. The jets were produced by injecting water through a number of discrete holes arranged along the cylinder's...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-3107
..., they are subjected to vortex-induced motions (VIM) when exposed to currents. From an academic point of view, the detailed hydrodynamics of how vortices are generated around a surface-piercing truncated and interact with free surface are poorly understood and should be further studied. There have been...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-199
.... The drag and lift characteristics, the vorticity, streamline distribution and the vortex shedding frequency are investigated. Numerical results are compared with those of the Finite Volume method (FVM) software calculations and indicate good agreements. INTRODUCTION Flow past a bluff body, such as...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-681
... simulated via full beam element software that includes the axial stiffness. For the response under vortex shedding or VIV, industry software uses modal based methods, e.g. Shear7, these do not include any axial properties in the calculation, thus the potential for any axial stress and motion is missing...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-661
... would end up in different situations for various initial excitation. The cylinder presents large vibration amplitudes at high reduced velocities companying with vortex shedding frequencies locked to multiple harmonics of natural frequencies. INTRODUCTION Vortex-induced vibrations (VIV) of...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-200
...". The reason was considered as superposition of shedding frequency of different vortex. The Strouhal number ST is 0.167, which is smaller than circular cylinder flow, which means that the four-arc cylinder has a lower motion frequency in the cross-flow direction at the same Reynolds number...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-396
... ABSTRACT An experimental investigation into controlling separation over a hemisphere by local wall suction has been carried out in a circulating water tunnel. The reduction in vortex shedding frequency seems to be due to weakening of the necklace vortices by local wall suction, which reduced...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-053
... ABSTRACT The curved riser has locally different forces due to its large radius of the curvature, and the consideration of force variations along the curved shape is essential to understand the vortex-induced vibration (VIV) of the riser. Moreover, since the riser is exposed to the current in...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-015
... ABSTRACT In this paper, we mainly emphasize numerical simulation of three typical vortex dominant flow problems by using the two in-house Navier-Stokes solvers (such as the finite-volume unstructured and cut-cell VOF finite-volume multiphase LES solvers, respectively) and commercial software...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-442
... ABSTRACT In this paper, the difference of the motion between buoyancy modules attached riser like a Steel Lazy Wave Riser (SLWR) and bare riser was studied by the model test and the numerical simulation. In particular, Vortex Induced Vibration (VIV) generated on each riser was focused. A 1/9...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-230
... angle of fairings) was investigated experimentally in a wind tunnel. It was found that all the response here shows the typical VIV phenomenon, where the excitation was limited in a discrete range of velocities. The vortex shedding frequency also demonstrates the typical frequency lock-in. The attachment...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-416
... drag coefficient of the two cylinders are studied. The results show that with the changes of arrangement type and Reynolds number, the vortex shedding presents different forms, and the flow parameters of internal waves also changes. The results of this paper can provide the necessary reference for the...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-273
..., Tokyo bay or Mikawa Bay if Tokai-Nankai-Tonankai earthquake occurs. Therefore, it is very urgent to develop countermeasures to prevent or reduce the risk of such disasters caused by large tsunamis. flexible pipe deformation upstream oil & gas vortex cylinder drag coefficient lift...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-339
... bilge vortex moves up and down relative to the stern vertical motions and remains always inside the propeller radius. The secondary vortex is shedding above and below the dummy boss inside the low speed area. The oscillation of nominal wake factor in waves is almost sinusoidal unlike the KVLCC2 one...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-361
... aspect ratio 0.5 was also presented. INTRODUCTION Floating offshore wind turbines (FOWTs) are subjected to severe environmental loads due to winds, waves, and currents. Vortex-induced motion (VIM) is the result of the exciting forces by vortex shedding on the hull of a bluff body exposed to currents...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-357
... prediction finite element method deformation propeller composite propeller strength pressure side flexible propeller equation lin geometry composite structure flexible composite propeller vortex natural frequency hydroelastic performance Numerical Prediction of Hydroelastic Performance of...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-373
... ABSTRACT A set of nonlinear wave equations based on the acoustic perturbation theory in the frequency domain is developed to simulate vortex-sound interaction and analyze acoustic scattering phenomena from the underwater vortical flow over an airfoil. The vortex can influence the propagation...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-462
... ABSTRACT The vortex shedding was simulated by viscous CFD technique when the linearly stratified fluid past a hydrofoil at a constant speed. Based on thermal density current model, the linear stratification of density was achieved by specifying the distribution of temperature. The RANS method...

Product(s) added to cart

Close Modal