A review of heat exchanger tube bundle vibrations in two-phase cross-flow

Khushnood, Shahab; Khan, Zaffar M.; Malik, M. Afzaal; Koreshi, Zafar Ullah; Khan, Mahmood Anwar

doi:10.1016/j.nucengdes.2003.11.024

Cited by 35 publications

(18 citation statements)

References 41 publications

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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

119

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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

119

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“…More recently researchers have expanded the study to two-phase flow which occur in nuclear steam generators and many other tubular heat exchangers, a review of which was last given by . A current review on this topic is given by (Khushnood et al, 2004) The use of Finite Element Method (FEM), Computational Fluid Dynamics (CFD) and Large Eddy Simulation (LES) have proved quite useful in analyzing flow-induced vibrations in tube bundles in recent years. Earlier on, only pressure drop and heat transfer calculations were considered as the basis of heat exchanger design.…”

Section: Periodic Sheddingmentioning

confidence: 99%

“…The acceptance integral is given by: Yang obtained closed form solutions for the joint acceptances for two special cases of springsupported and simply-supported beams. A review of turbulence in two-phase is presented by (Khushnood et al, 2003). (Endres & Moller, 2009) present the experimental analysis of disturbance propagation with a fixed frequency against cross flow and its effect on velocity fluctuations inside the bank.…”

Section: Turbulence Excitationmentioning

confidence: 99%

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

Khushnood¹,

Khan²,

Malik³

et al. 2012

Nuclear Power Plants

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“…Given the slenderness of the tube bundle, jet impingement on tubes did presumably result in flow-induced vibrations or flapping (Khushnood et al, 2004). Those vibrations would have prevented particles from being effectively retained by enhancing resuspension to some extent.…”

Section: Tube Vibrationmentioning

confidence: 99%

Experimental characterization of aerosol retention in the break stage of a dry steam generator in SGTR sequences.

Velasco¹,

Javier²

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Severe accident Steam Generator Tube Rupture (SGTR) sequences are identified as major contributors to risk of Pressurized Water Reactors (PWR). Their relevance lies in the potential radioactive release, in form of aerosol, from reactor coolant system to the environment. However, radioactive particles could be partially retained in the secondary side of the steam generator, even in the absence of water. Lack of knowledge on the source term attenuation capability of the steam generator has avoided its consideration in probabilistic safety studies and severe accident management guidelines. As a consequence, the steam generator filtering capability is not usually taken into account either in the probabilistic risk assessment of nuclear safety or in the severe accident management guidelines.This thesis describes the main activities and results of a bench-scale experimental program focused on getting insights into the aerosol retention in the break stage of the secondary side of a dry steam generator. The thesis is framed in the CIEMAT contribution to the ARTIST project (2003)(2004)(2005)(2006)(2007)(2008) which was supported by te Spanish Nuclear Regulatory Commission (CSN). The general objective of the work was to generate a comprehensive database on fission product retention in the break stage of a dry steam generator during a severe accident SGTR sequence. The specific objectives were to assess the influence of aerodynamic flow field as well as the influence of particle nature on aerosol deposition in the tube bundle. To do so, a scaled-down mock-up with representative dimensions of a real SG was built. The aerodynamic characterization of the flow field within the break stage of the bundle was done via 2D PIV (particle image velocimetry) technique. The particle nature influence on retention was characterized through aerosol retention experiments in the tube bundle mock-up. The major variables investigated were the type of breach (guillotine vs fish-mouth), the inlet gas mass flow rate (75-250 kg/h) and the particle type (polidispersed TiO 2 agglomerates vs. solid, monodisperse SiO 2 spheres).The aerodynamic campaign permitted to characterize the flow field close to the breach for both type of breaches and to asses their similarities. Results showed that the jet flows within the tube bundle following a generic quasi-parabolic trajectory evolving from an oblique cross flow configuration to an axial one. Mean flow field near the breach is substantially affected by the entrainment of initially stagnant gas into the jet. This effect is fostered by the presence of tubes and their tight packing. Jet penetration and turbulence intensity are considerably enhanced when increasing inlet gas mass flow rate.The results of the aerosol campaign showed that particle nature substantially affects retention in the tube bundle: mass retention was low for TiO 2 agglomerates (less than 30%) whereas it was much higher for SiO 2 particles (around 85%). Collection efficiency is also affected by gas mass flow rate: its sensitivity ...

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A review of heat exchanger tube bundle vibrations in two-phase cross-flow

Cited by 35 publications

References 41 publications

Two-phase flow induced vibration in piping systems

Two-phase flow induced vibration in piping systems

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

Experimental characterization of aerosol retention in the break stage of a dry steam generator in SGTR sequences.

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