Design optimization of shell and tube heat exchanger by. Vibration is usually divided into two character types. These slender structures experience both current flow and topend vessel motions, which give rise to the flowstructure relative motion and cause viv. 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. Vibration measurements were taken under various slug flow rates.
Equations were developed to express the influence of internal fluid flow on the natural frequency and displacement amplitude of vibrating pipes. How a piping system was affected by flowinduced vibration. Many studies have attempted to combine mass ratio and damping. In recent years, twophase flow induced vibration fiv has been given increasing attention in various engineering fields including petroleum pipelines, power and processing plants, heat exchangers, as well as in the nuclear power plant components altstadt et al. Bridges golden gate bridge, san francisco 1951 wind speed.
At high mass flow rates and pressure drops, flow across a restriction e. Everyday low prices and free delivery on eligible orders. Axial flow induced vibration has been experimentally investigated with clampedfree cantilevered cylindrical rods confined in a tube and subjected to axial water flow. The flowinduced vibration fiv of multiple cylinders is a common phenomenon in industry and. Flow induced vibration, or vortex shedding, is due to high flow velocities such as in a piping dead leg of a centrifugal compressor system. The study can also include fiv excitation of smallbore piping and components in the flow, such as thermowells. Vortexinduced vibration viv is an important source of fatigue damage of offshore oil exploration and production risers. Flowinduced vibration fiv is a multidisciplinary subject involving fluid and. Experimental investigation of flowinduced vibration of a. With certain flow conditions, piping systems will develop high levels of noise and vibration that can damage the pipes and related systems such as tube bundles, side cavities, and bluff or tapered bodies in flow streams. Flowinduced vibration analysis of supported pipes with a. Mechanics of flowinduced vibration failures of heat exchangers caused by flowinduced vibration are mainly in terms of the detriments of heat exchanger tubes.
Fluidstructure interaction fsi is the multiphysics study of how fluids and structures interact. For instance, the slender bodies of aircraft fuselages, missiles, and rockets, and the main bodies of industrial smokestacks, power transmission cables, telephone wires, oil pipelines, reactor fuel rods, heatexchanger tubes, and offshore structures, as well as. Vortexinduced vibrations of three circular cylinders in an equilateral. As mechanical working in thermal fluids, this book is pure gold. Trans icheme, vol 80, part a, april 2002 flowinduced vibration in heat exchangers 229 buffetingall heat exchanger tubes are in constant motion due torandom buffeting. A discussion on flow induced noise and vibration in the inlet section of a lng liquefaction unit covers how to prevent it in future lng installations. Wind induced vibration and the effects on steel and aluminum light poles provides detailed information about what aeolian vibration is, how it can be identified, how wind induced vibration can affect the performance and strength of light poles, and ways the effects of vibration can be mitigated both pro and retroactively. Flow induced vibration during the optic fiber coating process 107 m. Section 5 explores results of flowinduced vibration analysis, final investigations and results are presented in section 6 and concluding remark is given in section 7. The most probable and widely observed mechanism of piping steadystate vibrations is flow induced vibration. Flowinduced turbulence fit analysis vortex shedding. Introduction ashley and haviland, 1950 1 studied the flow induced vibration of the trans.
Jun 30, 2006 buy flowinduced vibration second by robert d. 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. The most probable and widely observed mechanism of piping steadystate vibrations is flowinduced vibration. An experimental study of flow induced vibration of elastically restrained pipe conveying fluid conference paper pdf available november 2015 with 1,445 reads how we measure reads. Windinduced vibration and the effects on steel and aluminum light poles provides detailed information about what aeolian vibration is, how it can be identified, how windinduced vibration can affect the performance and strength of light poles, and ways the effects of vibration can be mitigated both pro and retroactively. Research on flowinduced vibration and energy harvesting. The first international symposium on flow induced noise and vibration issues and aspects was held in november 20 over 3 days in rome, hosted by the consiglio nazionale delle ricerche cnr. Blevins, flowinduced vibrations first edition, van nostrand reinhold, new york 1977 reprinted by krieger publ. Flowinduced vibration of circular cylindrical structures. Axialflowinduced vibration has been experimentally investigated with clampedfree cantilevered cylindrical rods confined in a tube and subjected to axial water flow. The consequential acoustically induced vibration aiv in the downstream piping can cause fatigue failures through the pipe wall at branch connections andor welded supports. These slender structures experience both current flow and topend vessel motions, which give rise to the flow structure relative motion and cause viv. Kaneko nonlinear dynamics of clamped cylindrical shells subjected to flow 125 k.
The frequency of vortex shedding has a possible relationship with the flow ve locity. The fluid flow may exert pressure andor thermal loads on the structure. A project for the acquisition of viv data was launched in. It was not until the 60s, when widespread failure of tubes began to occur 16. Flowinduced vibration of elastically supported rectangular cylinders. Flowinduced vibration fiv analysis vortex shedding. While flowinduced vibration of bluff bodies has been extensively studied over the last. Blevins, 9780442206512, available at book depository with free delivery worldwide. Flow induced vibration is a term to denote those phenomena associated with the response of structures placed in or conveying fluid flow.
One of the main causes of the unpredictable behaviour of pipes is the induced vibrations due to the interaction between the structure walls of the pipe as well as the pipe supports and the fluid flowing through the pipe. Moretti linear and nonlinear analyses of sheet flutter induced by leakage flow 119 x. Although the vibration amplitudes are small, often only a fraction of the tube wall thickness, therandom vibration is remorseless and goes on throughoutthelife of the heat exchanger. Pipe damage compromises plant safety, forces shutdowns, increases maintenance, and reduces efficiency and capacity. Notably, the viv of an isolated circular cylinder in crossflow has received much attention williamson and govardhan 2004, sarpkaya 2004, blevins.
Blevins, 9780894648236, available at book depository with free delivery worldwide. This title also focuses on acoustic and mechanical vibration of heat exchangers, power lines, and process ducting. Moretti, why can the prediction of heatexchanger vibrations fail. This paper presents experimental results that enhance the understanding of the mechanism of fluid structure interaction fsi phenomena, and the nature of resulted vibration due to slug flows. Transverse oscillation of a dynamically supported circular cylinder in a flow at re100 has been numerically simulated using a highresolution viscousvortex method, for a range of dynamical parameters. The physical mechanisms corresponding to the 3 source types, and examples of when. This book focuses on applications for offshore platforms and piping. Flowinduced vibration, or vortex shedding, is due to high flow velocities such as in a piping dead leg of a centrifugal compressor system. Flowinduced vibration analysis of supported pipes with a crack. Flowinduced vibration article about flowinduced vibration. Trans icheme, vol 80, part a, april 2002 flow induced vibration in heat exchangers 229 buffetingall heat exchanger tubes are in constant motion due torandom buffeting.
The mechanism is identical to what happens in a rig of active wave control. There were 16 contributors from italy,france, sweden, united states of america, canada, and china. Pdf a discussion on flow induced noise and vibration in the inlet section. The effects of water superficial velocities on the vibration. Southwest research institute swri engineers identify the cause of flowexcited acoustic resonance in piping systems and components and develop engineered solutions with vibration testing and design. The fit analysis considers the interaction between turbulent energy and lowfrequency piping modes and makes recommendations to increase the stiffness of the piping support structure. Vortexinduced vibration of three circular cylinders each of diameter d in an. This paper describes an approach for practical evaluation and elimination of steadystate vibration. The most effective means of accomplishing this objective is to arrange the shellside fluid to flow across the tube bank.
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. Vortex regimes from a fixed circular cylinder blevins 1984. The flow induced vibration of pipes due to internal flowing fluid is studied and investigated. Among the topics of flow induced vibration, cylindrical structures play very important and vital roles. Vortex induced vibration viv is an important source of fatigue damage of offshore oil exploration and production risers. More specifically, the terra covers those cases in which an interaction develops between fluid. The membrane vibrates in response to the grazing incident waves and the vibration serves to reflect the wave towards its source. Pdf an experimental study of flow induced vibration of. Blevins book is an absolute must have in cfd and fea for thermal fluids. The backtoback vortexinduced vibration viv and galloping are achieved.
Deeplinestm 2000 keywords manual, ifpprd report v2r2. Introduction ashley and haviland, 1950 1 studied the flowinduced vibration of the trans. In pursuing noise and wave control with minimal aerodynamic or hydrodynamic sacrifice, a tensioned membrane is used to line the otherwise rigid duct wall. Focuses on applications for offshore platforms and piping. Flowinduced vibration in heat exchangers sciencedirect. An asymptotic method, based on the approximation of bogoliubov and mitropolsky, is developed for the analysis of the autonomous, internally resonant, nonlinear differential equations produced. Flow induced noise and vibration issues and aspects. The data acquisition and the control of the freestream velocity and motor rotation. Full text of flow induced vibration internet archive. Experimental investigations of vortex induced vibration of a flat plate in pitch. Flowinduced vibration problems stress engineering services. In order to estimate the crack location and depth in the pipe, we need to utilize the variation of the difference between the natural frequencies of the pipe conveying fluid with and without crack.
The vibration data was acquired using a portable multichannel vibration analyzer and industrial uniaxial accelerometers. In this study, vibration assessment steps were explored in greater detail for a piping system subjected to flowinduced vibration. Fluidelastic stability diagram for tube bundles asme boiler code, 1998 recent projects involving flowinduced vibration in process. Different sources of vibration, including pressure pulsation caused by rotating equipment. This study evaluates vortex shedding and potential vibration across dead leg branches. The corotating vortices merge in a short distance, which leads to the. The methodology used for this study is the energy institutes guidelines for the avoidance of vibration induced fatigue failure in process pipework aviff. 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. A central goal in the thermal design of tubular heat exchangers is to utilize the available shellside pressure loss to maximize the shellside film coefficient. Flow induced vibration problems in process and power plants page 4 legend square triangle rotated triangle mean suggested unstable m2. Moretti, flow induced vibrations and flow instabilities, chapter 42 in modern vibrations primer, crc press, boca raton, fl 33431, 2000, isbn 0849320380. The topend vessel motion causes the riser to oscillate and the. An experimental study of flow induced vibration on a.
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