Fluid-elastic instability in tube arrays subjected to air-water and steam-water cross-flow

Mitra, Deepanjan; Dhir, Vijay K.; Catton, I.

doi:10.1016/j.jfluidstructs.2009.07.002

Cited by 43 publications

(25 citation statements)

References 29 publications

(37 reference statements)

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“…Two-phase FIV on cross flow exists in shell-and-tube heat exchangers (Kanizawa et al, 2012;Khushnood et al, 2004;Mitra et al, 2009;Nakamura et al, 1986Nakamura et al, , 1992Pettigrew and Knowles, 1997;Sasakawa et al, 2005;Zhang et al, 2007), U-tube region in the pressurized water reactor (PWR) steam generators (Pettigrew et al, 1998), and offshore structures (JSME, 2003). Cross flow generally involves either isolated cylinder or bundles of cylinders.…”

Section: Two-phase Cross Flowmentioning

confidence: 99%

Two-phase flow induced vibration in piping systems

Miwa

Mori

Hibiki

2015

Progress in Nuclear Energy

114

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Section: Two-phase Cross Flowmentioning

confidence: 99%

Two-phase flow induced vibration in piping systems

Miwa

Mori

Hibiki

2015

Progress in Nuclear Energy

114

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“…1 shows a schematic of the experimental loop used in the present work. This setup has been extensively applied to research on the crossflow-induced vibration of cylinder arrays [12][13][14][15][16][17]. The working fluid was water.…”

Section: Introductionmentioning

confidence: 99%

“…Screw nuts were used to adjust the springs and, consequently, the natural frequency of the vibration system. The displacement mechanism of the monitored cylinder was derived from Joo and Dhir [24], Mitra [25], and Cagney and Balabani [26]. The measured cylinder was freely moving simultaneously in both the in-line and transverse directions.…”

Section: Introductionmentioning

confidence: 99%

Instability behaviors of a cylinder array under both increasing and decreasing flow velocities

Zhang¹,

Jiang²,

Xiao³

2017

J. vibroeng.

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Abstract. This study aimed to investigate the effects of increasing and decreasing crossflow velocities on the fluid-elastic instability behaviors of cylinder arrays. The responses of an elastically mounted cylinder in a rigid normal square cylinder array in a water tunnel subjected to crossflow were tested. The responses were simultaneously obtained from both in-line and transverse vibrations. Results show that the responses under increasing freestream velocity differ from those under decreasing freestream velocity. Under decreasing freestream velocity, fluid-elastic instability was accompanied by nonlinear hysteresis, and the cylinder exhibiting this instability can remain in this state for a certain range of flow velocities. Added mass coefficients were also obtained. Two criteria for fluid-elastic instability were applied.

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“…Majority of the work that has been carried out on flow induced vibration analysis includes vibration analysis of plain tube arrays subjected to single and two-phase cross flow of Water, Air-Water and Refrigerants (R11, R22, R134a etc.) [2], [3], [4]. These days finned tubes instead of plain tubes are used in most of the heat exchangers and their use is likely to increase more in coming days.…”

Section: Introductionmentioning

confidence: 99%

Determination of Modal Parameters for Finned Heat Exchanger Tubes of Various Configurations

Desai¹,

Pavitran²

2013

ujme

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Very first step in the analysis of fluid elastic vibrations of heat exchanger tubes is determination of modal parameters (natural frequency and damping ratios) of the tubes. Natural frequencies and damping ratios of the tubes are very important parameters as critical velocity at instability also depends on them. Lower natural frequencies are desired so as to achieve the fluid elastic instability with limited flow capacities of the pump. This paper presents part of the research work to analyze fluid elastic vibrations of finned tubes subjected to single and two phase cross flows of water and air-water. It consists of determination of modal parameters of finned tubes for two different fin pitches (2.54 and 6.35 mm). The work also consists of determination of modal parameters for finned tube attached with welded rods of 220 mm length to reduce natural frequencies. It helps to know how fin tube parameters affect the natural frequency and damping values and hence their proneness to fluid elastic vibration. Further, as a requisite for easy conduct of experiments on fluid elastic vibration analysis of finned tubes, it is found that, natural frequencies of 56 and 65 Hz of fin tubes are reduced to 14 and 17 Hz respectively when solid rods of 220 mm length are welded to them.

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Fluid-elastic instability in tube arrays subjected to air-water and steam-water cross-flow

Cited by 43 publications

References 29 publications

Two-phase flow induced vibration in piping systems

Two-phase flow induced vibration in piping systems

Instability behaviors of a cylinder array under both increasing and decreasing flow velocities

Determination of Modal Parameters for Finned Heat Exchanger Tubes of Various Configurations

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