Numerical study on the suppression of the vortex-induced vibration of an elastically mounted cylinder by a traveling wave wall

2014 ◽  
Vol 44 ◽  
pp. 145-165 ◽  
Author(s):  
Feng Xu ◽  
Wen-Li Chen ◽  
Yi-Qing Xiao ◽  
Hui Li ◽  
Jin-Ping Ou
Keyword(s):  
Traveling Wave ◽  
Numerical Study ◽  
Vortex Induced Vibration

A Numerical Simulation of Vortex Induced Vibration on a Elastically Supported Circular Rigid Cylinder at Moderate Reynolds Numbers

2008 ◽  
Author(s):  
Jean-Franc¸ois Sigrist ◽  
Cyrille Allery ◽  
Claudine Beghein
Keyword(s):  
Numerical Simulation ◽  
Fluid Flow ◽  
Circular Cylinder ◽  
Finite Volume ◽  
Vortex Shedding ◽  
Numerical Study ◽  
Reynolds Numbers ◽  
Forced Oscillations ◽  
Vortex Induced Vibration ◽  
Elastically Supported

The present paper is the sequel of a previously published study which is concerned with the numerical simulation of vortex-induced-vibration (VIV) on an elastically supported rigid circular cylinder in a fluid cross-flow (A. Placzek, J.F. Sigrist, A. Hamdouni; Numerical Simulation of Vortex Shedding Past a Circular Cylinder at Low Reynolds Number with Finite Volume Technique. Part I: Forced Oscillations, Part II: Flow Induced Vibrations; Pressure Vessel and Piping, San Antonio, 22–26 July 2007). Such a problem has been thoroughly studied over the past years, both from the experimental and numerical points of view, because of its theoretical and practical interest in the understanding on flow-induced vibration problems. In this context, the present paper aims at exposing a numerical study based on a fully coupled fluid-structure simulation. The numerical technique is based on a finite volume discretisation of the fluid flow equations together with i) a re-meshing algorithm to account for the cylinder motion ii) a projection subroutine to compute the forces induced by the fluid on the cylinder and iii) a coupling procedure to describe the energy exchanges between the fluid flow and solid motion. The study is restricted to moderate Reynolds numbers (Re∼2.000–10.000) and is performed with an industrial CFD code. Numerical results are compared with existing literature on the subject, both in terms of cylinder amplitude motion and fluid vortex shedding modes. Ongoing numerical studies with different numerical techniques, such as ROM (Reduced Order Models)-based methods, will complete the approach and will be published in next PVP conference. These numerical simulations are proposed for code validation purposes prior to industrial applications in tube bundle configuration.

Numerical Study of the Small-Signal Modulation Bandwidth of Reflective and Traveling-Wave SOAs

2015 ◽  
Vol 33 (13) ◽  
pp. 2758-2764 ◽  
Author(s):  
Angelina R. Totovic ◽  
Jasna V. Crnjanski ◽  
Marko M. Krstic ◽  
Dejan M. Gvozdic
Keyword(s):  
Traveling Wave ◽  
Numerical Study ◽  
Small Signal ◽  
Modulation Bandwidth ◽  
Signal Modulation ◽  
Small Signal Modulation

scholarly journals Numerical Study on the Effect of Mean Pressure and Loop's Radius to the Onset Temperature and Efficiency of Traveling Wave Termoacustic Engine

2020 ◽  
Vol 3 (3) ◽  
pp. 96-103
Author(s):  
Endang Dian Rokhmawati ◽  
Irna Farikhah ◽  
Ummi Kaltsum ◽  
Harto Nuroso ◽  
Aan Burhanudin ◽  
...  
Keyword(s):  
Traveling Wave ◽  
Waste Heat ◽  
Numerical Study ◽  
Heating Temperature ◽  
Heat Energy ◽  
Onset Temperature ◽  
Working Fluid ◽  
Air Conditioner ◽  
Mean Pressure ◽  
Stability Limits

The thermoacoustic engine can be a device to convert waste heat energy in the engine car become useful energy such as for charging battery in car or Air conditioner of the car. This work can be done by experimentally and numerically. There are some parameters that have an impact on the performance of the engine. They are geometry of the engines, working fluid, and mean pressure. The performance of the engine depends on the efficiency and the heating temperature. In the car, waste heat energy is not high enough. Therefore, we need to utilize the low heating temperature to be converted into useful energy. This study contributes to numerically the effect of mean pressure and loop’s radius of the regenerator on the onset temperature and the efficiency of traveling wave thermoacoustic engines. The application that is used to solve numerical problems is fortran95. There are two codings that are used in fortran95. They are stability limits and efficiency codes. The lowest onset temperature that achieved is 153˚C with efficiency up to 38.1% that can be reached when the mean pressure is 4.0 MPa and the loop's radius is 5 cm. This result indicated that we can use low heating temperatures from waste heat of engine car to turn on electronics equipment inside the car.

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