Cross-Flow-Induced-Vibrations in Heat Exchanger Tube Bundles: A Review

Khushnood, Shahab; Khan, Zaffar M.; Malik, M. Afzaal; Koreshi, Zafarullah; Javaid, Muhammad Akram; Khan, Mahmood Anwer; Qureshi, Arshad Hussain; Nizam, Luqman Ahmad; Bashir, Khawaja Sajid; Hussain, Syed Zahid

doi:10.5772/35635

Cited by 10 publications

(8 citation statements)

References 121 publications

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“…Many utility industries have lost millions of dollars due to the failure of handling this vibration problem. The shutdown of different plants as a result of these vibrations motivated the researchers to examine this phenomenon caused by the fluid flow (Lever and Weaver 1986, Goyder 2002, Lumsden and Weaver 2007, Khushnood, Qureshi et al 2012.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fin Geometry on Flow-Induced Vibration Response of a Finned Tube in a Tube Bundle

Arshad

Khushnood

Nizam

et al. 2018

JAFM

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An experimental study is carried out on a parallel triangular finned tube array with P/Deff ratio 1.62 to examine the effect of fin geometry on flow-induced vibration response. Fins on a tube increase the heat transfer rate but these also affect the fluid dynamics around the tube. The flow pattern across the finned tubes is complex as compared to bare tube arrays. There are numerous parameters that affect the finned tube vibration subjected to air cross-flow in a tube array. In the current study, some of these parameters i.e. fin thickness and fin density are focused and their effects on flow-induced vibration response are analyzed in different rows of fin tube array. The current experimentation is performed in a subsonic wind tunnel using a single flexible Aluminum finned tube in a rigid array. Seven tubes with similar specifications but distinct fin thickness and fin density are used for the testing purpose. Their amplitude response suggests that the flowinduced vibration behavior is greatly affected by changing the finned tube parameters. It has also been observed during spectral analysis that the Strouhal number is independent of fin geometry since it remained constant in different rows of the array for finned tubes under study. It suggests that the vortex shedding has also contributed towards the finned tube vibration predominantly in the first, second and the fourth row of tube array.

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Section: Introductionmentioning

confidence: 99%

Effect of Fin Geometry on Flow-Induced Vibration Response of a Finned Tube in a Tube Bundle

Arshad

Khushnood

Nizam

et al. 2018

JAFM

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“…When many Investigators study the fluid induced vibration problems, most of them focused on the single structure, such as a tube or beam, with a fluid. Only a few studies [Elkashlan (1980), Shahab et al (2012] focused that the dynamics of a global system with a lot of structures are induced simultaneously and reacted by the fluid, as a heat exchanger system with several tubes except the fluid coupling effect. In this work, the fluid induced vibration in several tubes, because each tube is coupled to the adjacent tube through the fluid, fluid coupling effect can be found in this system.…”

Section: Dynamic Properties Of Coupled Tube-array Structures With Thementioning

confidence: 99%

Dynamic Properties of Coupled Tube-Array Structures with the Axial Loads

Huang

Tseng

2016

Lat. Am. j. solids struct.

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The tube-array structures coupled both with the fluid and the axial load is focused. In a heat exchanger, the tubes are frequently affected by cold and hot fluid shock waves. Thus, tubes are often found to be vibrated and even to be worn out. This vibration may not only alter the performance of the tubes but also introduce the damage in the heat exchanger. In this work, the dynamic properties of coupled tube-array structures with the axial loads are investigated. Futher, the tube-array structures in a heat exchanger, consisting of periodic cooling tubes are also considered to simulate as a coupled periodic structure system. It is found that each tube of the system is weakly coupled to the adjacent tube via water. By using the Galerkin method, the equations of the coupled system with the fluid effect can be derived. Numerical results reveal that the axial load and fluid effects may influence the dynamic properties of a fluid coupled tubearray structures system of a heat exchanger significantly.

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“…Furthermore, it is possible that side forces in the support be larger for very small clearances thus explaining the somewhat higher damping (PETTIGREW et al, 1986). Following the above discussions, Khushnood et al (2012) compiled the design guidelines proposed by Pettigrew et al (1986) and Pettigrew et al (1991), which are devoted to evaluate damping ratio due to friction, squeeze film at supports and due to the supports.…”

Section: Effect Of Higher Modesmentioning

confidence: 99%

“…Design guideline for squeeze film damping ratio: Khushnood et al (2012) present an expression for squeeze-film damping ratio for multi-span tube given by…”

Section: Effect Of Higher Modesmentioning

confidence: 99%

“…Regarding the vibration mechanisms, Khushnood et al (2012) pointed out that the same vibration mechanisms of single-phase flow are present during two-phase flow, and that the occurrence of a specific vibration mechanism depends on the operational conditions. According to Pettigrew et al (1991), fluidelastic instability and turbulence excitation are the most important mechanisms in tube bundles during two-phase crossflow, while periodic shedding and acoustic resonance are unlikely to occur.…”

Section: Introductionmentioning

confidence: 99%

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Experimental assessment of equivalent loads and dynamic parameters on vibration induced by two-phase crossflow in tube bundles

Briceño¹

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This project has been funded by the Brazilian National Council for Scientific and Technological Development-CNPq (grant numbers 481044/2010-8 and 307369/2013-7) and the doctorate scholarship from CAPES Foundation, for which I am grateful. I would like to thank the São Carlos School of Engineering, University of São Paulo, USP-Brazil, which welcomed me and has been my home during these six years of study and work. My big and sincere thank goes to my promoter, Prof. Leopoldo de Oliveira, who supported me in several ways since the very first time we got in touch via e-mail. Thank you, Leopoldo, for always be in a good mood and available for answering my questions, for your respect to my time and your consideration. Thank you for sharing your knowledge about experimental structural dynamics and, specially, for making feasible the ideas I proposed for our tests. I use to make a joke: if I would necessitate enriched uranium, Leopoldo would provide. Thanks for the freedom you gave me to make the decisions in the present project. My sincere thanks go to Prof. Gherhardt Ribatski, who let me be part of the project. Also, I would like to thank your "encouraging phrases", they were used to challenge me in the subject that you imparted to me, as well as, to take me out from my comfort zone in many times. Moreover, I would like to thank you for considering myself to write the chapter for the Encyclopedia of Two-Phase Heat Transfer and Flow, it was an invaluable experience. I would like to express my thanks to Prof. Fabio Kanizawa, who designed and mounted the test bench in which I performed the experimental campaign. Thank you for your patience and to be willing to help. Actually, this paragraph should be longer, however, I already gave a speech when you left São Carlos.

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Cross-Flow-Induced-Vibrations in Heat Exchanger Tube Bundles: A Review

Cited by 10 publications

References 121 publications

Effect of Fin Geometry on Flow-Induced Vibration Response of a Finned Tube in a Tube Bundle

Effect of Fin Geometry on Flow-Induced Vibration Response of a Finned Tube in a Tube Bundle

Dynamic Properties of Coupled Tube-Array Structures with the Axial Loads

Experimental assessment of equivalent loads and dynamic parameters on vibration induced by two-phase crossflow in tube bundles

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