Flow-induced instability of an elastic tube
WebSep 9, 2024 · According to the needs generated by the industry, there is an urgent need to investigate the flow vibration response law of the elastic tube bundle of heat exchangers subjected to the coupling effect of shell and tube domain at different inlet flow velocities. In this paper, based on the continuity equation, momentum equation, turbulence model, … WebJan 5, 2024 · The flow-induced vibration in finned tube heat exchangers is affected by various parameters such as fin height, fin pitch, fin material, tube array, pitch ratio, fin type, fluid velocity etc. ... In this paper, an experimental investigation of fluid elastic instability in shell and tube heat exchangers is carried out by subjecting normal square ...
Flow-induced instability of an elastic tube
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WebFlow-induced vibration (FIV) can be characterized by 4 different excitation mechanisms including fluid elastic instability (FEI), vortex shedding, turbulent buffeting, and acoustic resonance. Turbulent buffeting and vortex shedding may cause a slight damage in tube bundles due to flow-induced vibrations over an extended amount of time or they Web• Successfully simulated and studied tube failure, including analyzing effects of different geometric and fluid parameters on multiple heat-exchanger tube array designs to study flow induced vibrations. • Researched existing literature regarding fluid elastic instability and vortex induced vibrations occurring in heat-exchangers.
WebMay 1, 2000 · @misc{etde_20341140, title = {Flow induced vibration analysis of SMART steam generator tubes : fluid elastic instability, turbulence induced vibration, tube inside vibration} author = {Kim, Y W, Kim, J H, Park, J S, Kim, J I, and Sim, W G} abstractNote = {Once - through helical steam generator, with design concepts quite different from the … Web2 been done to study flow induced vibration of tube bundles subjected to two-phase cross flow. Since then, a few studies were conducted in this area.
WebA mathematical model for flow-induced vibrations in heat exchanger tube banks is presented which includes the effects of vortex shedding, fluidelastic coupling, drag force, and fluid inertia coupling. Once the fluid forces are known, the model can predict the details of complex tube-fluid interactions: (1) natural frequencies and mode shapes of ... WebOct 1, 2024 · Flow-induced vibration is known to be caused by four mechanisms: turbulent buffeting, vortex shedding, fluid elastic instability (FEI), and acoustic resonance [1]. ... and studied the effect of single elastic tube and multiple elastic tubes on flow-induced vibration in a rigid tube array. The results showed that FEI is more likely to occur when ...
WebAug 11, 2024 · According to the analysis of fluid elastic instability, Liu and others put forward a new instability model based on other people’s research and pointed out that the improved model has the advantages of …
WebOct 6, 2024 · Kumaran, V., Fredrickson, G.H. & Pincus, P. 1994 Flow induced instability of the interface between a fluid and a gel at low Reynolds number. J. Phys. ... White, J. & Heil, M. 2005 Three-dimensional instabilities of liquid-lined elastic tubes: a thin-film fluid-structure interaction model. Phys. Fluids 17, 031506. high end department stores in los angelesWebJan 1, 2001 · When a tube bundle is subject to cross-flow with increasing velocity, it will come to a point at which the responses of the tubes suddenly rapidly increase without bound, until tube-to-tube impacting or other non-linear effects limit the tube motions. This phenomenon is known as fluid-elastic instability. high end designer handbags liquidationWebWEAVER D S, GROVER L K. Cross-flow induced vibrations in a tube bank-turbulent buffeting and fluid elastic instability[J]. Journal of Sound and Vibration,1978,59(2): 277-294. AUSTERMANN R, POPP K. Stability behaviour of a single flexible cylinder in rigid tube arrays of different geometry subjected to cross-flow[J]. high end designer costume jewelryWebPrediction of fluid-elastic instability onset is a great matter of importance in designing cross-flow heat exchangers from the perspective of vibration. In the present paper, the threshold of fluid-elastic instability has been numerically predicted by the simulation of incompressible, unsteady, and turbulent cross flow through a tube bundle in a normal … high end designer clutchesWebFeb 13, 2024 · The cross-flow over a surface-mounted elastic plate and its vibratory response are studied as a fundamental two-dimensional configuration to gain physical insight into the interaction of viscous flow with flexible structures. The governing equations are numerically solved on a deforming mesh using an arbitrary Lagrangian-Eulerian finite … high end dell laptop computerWebAbstract. Failure of tubes in shell and tube exchangers is attributed to flow induced vibrations of such tubes. There are different excitations mechanisms due to which flow induced vibration occurs and among such mechanisms, fluid elastic instability is the most prominent one as it causes the most violent vibrations and may lead to rapid tube … how fast is a category 6 hurricaneWebSep 4, 2024 · Fluid-elastic instability of tube bundles is the main cause of vibration failure of heat exchangers. To establish more reasonable and reliable design guidelines for fluid-elastic instability of tube bundles subjected to two-phase cross flow, we investigated experimentally the effects of the flow conditions of the two-phase flow and the … how fast is a cessna 310