This study evaluates vortex shedding and potential vibration across dead leg branches. This article describes why flowinduced vibration occurs, and how it can be. Flowinduced vibration article about flowinduced vibration. Blevins, 9780894648236, available at book depository with free delivery worldwide. Its jampacked with fluid studies, theories, and analysis principals, which in turn has helped me build linear. Fluidstructure interaction fsi is the multiphysics study of how fluids and structures interact. Results are presented from a flow induced vibration experiment conducted in a sheared current. Flowinduced vibrations best describe the interaction that occurs between the fluids dynamic forces and a structures inertial, damping, and elastic forces. Blevins 2nd ed ebook download as pdf file flow induced vibrations are usually regarded as a secondary design asme 2014 33rd international conference on ocean, robert d. Vortex induced vibration viv is an important source of fatigue damage of offshore oil exploration and production risers. Aiv and fiv in pipelines, plants, and facilities ipc201664651. Flowinduced vibration of pipeline on elastic support. Pulsation induced by vortex shedding can be extremely complex.
These slender structures experience both current flow and topend vessel motions, which give rise to the flow structure relative motion and cause viv. The rods flowinduced vibration consists of a fuzzy period1 motion. Everyday low prices and free delivery on eligible orders. More specifically, the terra covers those cases in which an interaction develops between fluiddynamic forces and the inertia, damping or elastic forces in the structures. Flowinduced vibration, or vortex shedding, is due to high flow velocities such as in a piping dead leg of a centrifugal compressor system. It covers the analysis of the vibrations of structures exposed to fluid flows. Blevins book is an absolute must have in cfd and fea for thermal fluids. Aug 25, 2012 alan watts how to see through the game the secret to life happiness duration. Proceedings, asme winter annual meeting symposium on flow induced vibration, chicago, december 1988. These are turbulent pressure pulsations see turbulent flow, vortex initiation and separation from tubes in crossflow see crossflow, hydroelastic. Hence the flow induced vertical force on the unit length of pipe is. The stability boundary of fluid velocity is expressed in terms of the system parameters, such as, pipe material density and rigidity, and fluid density, etc.
Variable headgates allowed a controllable horizontal shear to be produced. Alan watts how to see through the game the secret to life happiness duration. Stockmeier, fluid viscosity effects on flowinduced vibrations of tubes in crossflow, proceedings of the institution of mechanical engineers, flow induced vibration, pp. Jun 30, 2006 buy flowinduced vibration second by robert d. Vibration of tubes in heat exchangers is an important limiting factor in heat exchanger operation. The vibration is caused by nonstationary fluid dynamic processes occurring in the flow. The worldleading author team doesnt assume prior knowledge of mathematical methods and provides the reader with information on the basics of modeling. Equations were developed to express the influence of internal fluid flow on the natural frequency and. Acousticinduced vibration aiv and flowinduced vibration fiv are two common phenomena that can lead to vibrationinduced fatigue failures in piping systems. Flow induced vibration is a term to denote those phenomena associated with the response of structures placed in or conveying fluid flow.
Vibration is usually divided into two character types. The study includes, but not limited to, turbulenceinduced vibration, vorticity sheddinginduced vibration, and the fluid elasticstability. Article information, pdf download for downstream flat plate as the flow induced vibration. Acoustic and flow induced vibration acoustic and vibration technical manager associate member of the institute of acoustics key presenter at the iaia conference 20, south africa course introduction failures of piping systems in the oil, gas and petrochemical industries can lead to damage of assets, personal injury and loss of life. Acoustic induced vibration aiv and flow induced vibration fiv are two common phenomena that can lead to vibration induced fatigue failures in piping systems.
Flowinduced vibration problems stress engineering services. The physical mechanisms corresponding to the 3 source types, and examples of when. We investigate selfexcited lateral vibration of a pipe due to an internal flow. Lift is perpendicular to the inflow velocity and drag is parallel. This book explains how and why such vibrations happen and provides hints and tips on how to avoid them in future plant design. A detailed explanation of this phenomenon is available in blevins 1973. Blevins pdf flow induced vibration 9780898748918 by robert d. Roshkoexploration of flowinduced vibration at low mass and damping. This book focuses on applications for offshore platforms and piping. The study includes, but not limited to, turbulence induced vibration, vorticity shedding induced vibration, and the fluid elasticstability. Its jampacked with fluid studies, theories, and analysis principals, which in turn has helped me build linearnonlinear cfd tools to solve questions in my industry. As many previous studies were considered laminar flow re flow for which re 4000.
The site was an historic 1848 mill canal with a width of 58 feet. The problems typically occur in heat exchangers, boilers, flue gas coolers and piping downstream of bypass valves used for pressure letdown. General classification of twophase flow induced vibration, created based on jsme handbook as well as available literature pettigrew and taylor, 1994, is shown in fig. These flow related phenomena are called flow induced vibration. Downstream flat plate as the flowinduced vibration enhancer for. Flow induced vibration becht has been involved in a number of flow induced vibration problems. The rods flow induced vibration consists of a fuzzy period1 motion. Explain the vortex induced vibration, galloping, flutter, sonic fatigue, and fluid elastic instability. Pipeline facility managers, operators, designers, and engineers are faced with identifying and mitigating the risks of aiv and fiv to avoid catastrophic instances of vibration induced. At high mass flow rates and pressure drops, flow across a restriction e. Get your kindle here, or download a free kindle reading app. Flowinduced vibration analysis of supported pipes with a crack.
In many cases, lighthills theory can, nevertheless, be applied successfully, and it is the most commonlyused model for the study of flowinduced sound and vibration. Design and analysis of a dynamic structure for the study of multiphase flow induced vibration hydrodynamic mass phenomena for countergravity twophase cross. The fluid flow may exert pressure andor thermal loads on the structure. The most probable and widely observed mechanism of piping steadystate vibrations is flow induced vibration. Focuses on applications for offshore platforms and piping. Simulated results will be used to help to model the similar system mathematically. The frequency of the vortex shedding can be described by equation 1. Flow past a valve entrance cavity excites a standing wave, resulting in noise and vibration.
The most probable and widely observed mechanism of piping steadystate vibrations is flowinduced vibration. Full text of flow induced vibration internet archive. In this section an overall mathematical model describing vibration behavior of a cracked fluidconveying pipe. However, a simplified analysis can be performed using the concept of the strouhal number. The study can also include fiv excitation of smallbore piping and components in the flow, such as thermowells.
Flowinduced vibration has been added to your cart add to cart. Fluid flow is a source of energy that can induce structural and mechanical oscillations. This article describes why flow induced vibration occurs, and how it can be. Pipeline facility managers, operators, designers, and engineers are faced with identifying and mitigating the risks of aiv and fiv to avoid catastrophic instances of vibrationinduced. Results are presented from a flowinduced vibration experiment conducted in a sheared current. In milder cases, the problem may be annoying vibration and noise. These flowrelated phenomena are called flowinduced vibration. Each participant will receive a copy of the book, flow induced vibration, 2 nd edition, by dr. Flow induced vibration, or vortex shedding, is due to high flow velocities such as in a piping dead leg of a centrifugal compressor system. Flowinduced vibration with applications to failure. This book explains how and why such vibrations happen and provides hints and. In many plants, vibration and noise problems occur due to fluid flow, which can greatly disrupt smooth plant operations.
The consequential acoustically induced vibration aiv in the downstream piping can cause fatigue failures through the pipe wall at branch connections andor welded supports. Blevins, 9780442206512, available at book depository with free delivery worldwide. Flowinduced vibration of circular cylindrical structures. Flowinduced vibration fiv analysis vortex shedding. Flow induced vibrations best describe the interaction that occurs between the fluids dynamic forces and a structures inertial, damping, and elastic forces. These loads may cause structural deformation significant enough to change the fluid flow itself. Flowinduced vibration is a term to denote those phenomena associated with the response of structures placed in or conveying fluid flow.
Optimal control of flowinduced vibration of pipeline. The dynamic response of structures immersed in or conveying fluid flow. The flow induced vibration of pipes due to internal flowing fluid is studied and investigated. A similar tone is produced when air is blown across the mouth of a pop bottle. This paper describes an approach for practical evaluation and elimination of steadystate vibration. Proceedings, asme winter annual meeting symposium on flowinduced vibration, chicago, december 1988. Flow induced vibration is the leading cause of brine string failures in solutionmined hydrocarbon storage caverns in the united states. Pdf flowinduced vibration of pipeline on elastic support. The prospect of harvesting energy from flowinduced vibration using an elastic square. Flow induced vibration of bluff structures caltechthesis. As many previous studies were considered laminar flow re blevins 1973. Blevins flow induced vibration, you can download it in txt, djvu, epub, pdf formats depending on which one is more. Flowinduced vibration is the leading cause of brine string failures in solutionmined hydrocarbon storage caverns in the united states. It was not until the 60s, when widespread failure of tubes began to occur 16.
166 160 762 1339 740 867 1551 779 446 715 1353 84 114 745 347 870 988 633 1555 232 991 491 1371 1389 1050 1140 710 1087 1475 825 120 757 176 979 1032 450 1267 1222 1016 617 664 266 580 83