Flow-induced vibration and noise in heat exchanger tube bundles

2002 ◽  
Author(s):  
Hugh G. D. Goyder
Keyword(s):  
Heat Exchanger ◽  
Heat Exchanger Tube ◽  
Flow Induced Vibration ◽  
Tube Bundles ◽  
Exchanger Tube

A Comparative Study of Cross-Flow Induced Vibrations in Heat Exchanger Tube Bundles Using Bond Graph Approach

2005 ◽  
Author(s):  
M. Afzaal Malik ◽  
Badar Rashid ◽  
Shahab Khushnood
Keyword(s):  
Heat Exchanger ◽  
Comparative Study ◽  
Tube Bundle ◽  
Cross Flow ◽  
Bond Graph ◽  
Heat Exchanger Tube ◽  
Flow Induced Vibration ◽  
Study Results ◽  
Tube Bundles ◽  
Exchanger Tube

Flow-induced vibration (FIV) has been a major concern in the nuclear and process industries involving steam generator and heat exchanger tube bundle design. Various techniques and models have been developed and used for the analysis of cross-flow induced vibration of tube bundles. Bond Graph approach has been applied to existing FIV excitation models, followed by a comparative study. Results have been obtained using 20-SIM software. It is expected that the current approach will give a new dimension to the FIV analysis of tube bundles.

Modeling and Analysis of Thermal Damping in Heat Exchanger Tube Bundles

2006 ◽  
Author(s):  
Shahab Khushnood ◽  
Muhammad Afzaal Malik ◽  
Zaffar Muhammad Khan ◽  
Ayaz Khan ◽  
Qamar Iqbal ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Nuclear Power ◽  
Cross Flow ◽  
Design Guidelines ◽  
Heat Exchanger Tube ◽  
Flow Induced Vibration ◽  
Modeling And Analysis ◽  
Tube Bundles ◽  
Improved Design ◽  
Exchanger Tube

Most structures and equipment used in nuclear power plant and process plant, such as reactor internals, fuel rods, steam generator tubes bundles, and process heat exchanger tube bundles etc., are subjected to Flow Induced Vibrations (FIV). Costly plant shutdowns have been the source of motivation for continuing studies on cross-flow induced vibration in these structures. Damping has been the target of various research attempts related to FIV in tube bundles. A recent research attempt has shown the usefulness of a phenomenon termed as “thermal damping”. The current paper focuses on the modeling and analysis of thermal damping in tube bundles subjected to cross-flow. It is expected that the present attempt will help in establishing improved design guidelines with respect to damping in tube bundles.

scholarly journals Numerical Simulation of Flow-Induced Vibration of Three-Dimensional Elastic Heat Exchanger Tube Bundle Based on Fluid-Structure Coupling

2022 ◽  
Vol 2022 ◽  
pp. 1-17
Author(s):  
Shiqin Ai ◽  
Chao Sun ◽  
Yuechan Liu ◽  
Yuelin Li
Keyword(s):  
Heat Exchanger ◽  
Natural Frequencies ◽  
Tube Bundle ◽  
Three Dimensional ◽  
Vibration Characteristics ◽  
Heat Exchanger Tube ◽  
Flow Induced Vibration ◽  
Vibration Displacement ◽  
Tube Bundles ◽  
Exchanger Tube

The reliability of the heat exchanger tube bundle not only affects the economic efficiency of production but also relates to the normal development of production safety and health. To study the flow-induced vibration of tube bundles, a three-dimensional finite element model of heat exchange tubes and watersheds inside and outside the tubes was established to explore the flow-induced vibration characteristics of tube bundles and analyze the natural frequencies of single-span and multispan heat exchange tubes. Considering the randomness of the effective support between the tube bundle and the support plate of the heat exchanger, the natural frequency and vibration mode of the four-span tube with failure of the tube bundle support are analyzed. On this basis, the vibration caused by the two-way coupling flow between tube and tube outflow is calculated. Finally, the flow-induced vibration characteristics of the five-tube bundle with two different pitch-diameter ratios are analyzed. The calculation results show that the error between the calculated natural frequencies and the theoretical values is less than 3%, and within the allowable error range, the natural frequencies of the same order decrease with the increase of the number of support failures. The vibration frequencies of single-span and multispan tube bundles are consistent with the lift and drag frequencies, the vibration displacement curves show typical Strouhal modes, and the amplitude increases with the increase of fluid velocity. Vibration displacement curves of symmetrical spans of multispan tube bundles are similar in shape and amplitude. With the increase of tube bundle spacing, the vibration characteristics become more obvious.

Acoustic Resonance in Heat Exchanger Tube Bundles—Part I: Physical Nature of the Phenomenon

1987 ◽  
Vol 109 (3) ◽  
pp. 275-281 ◽  
Author(s):  
R. D. Blevins ◽  
M. M. Bressler
Keyword(s):  
Heat Exchanger ◽  
Gas Flow ◽  
Tube Bundle ◽  
Physical Nature ◽  
Transverse Mode ◽  
Acoustic Resonance ◽  
Heat Exchanger Tube ◽  
Sound Levels ◽  
Tube Bundles ◽  
Exchanger Tube

The intense acoustic resonance resulting from gas flow across a bank of heat exchanger tubes in a duct has been investigated experimentally and theoretically. At low gas velocities, the acoustic tone emanating from tube bundles increases in proportion to the flow velocity. When the frequency approaches a bound acoustic transverse mode of the tube bundle, intense sound can result. Sound levels as high as 173 db were measured within the bundle. During resonance, the sound correlates vortex shedding from the tubes and the pressure drop increases in some bundles.

Two-Phase Flow-Induced Vibration of Parallel Triangular Tube Arrays With Asymmetric Support Stiffness

2009 ◽  
Vol 131 (3) ◽  
Author(s):  
Paul Feenstra ◽  
David S. Weaver ◽  
Tomomichi Nakamura
Keyword(s):  
Two Phase Flow ◽  
Cross Flow ◽  
Phase Flow ◽  
Heat Exchanger Tube ◽  
Flow Induced Vibration ◽  
Two Phase ◽  
Tube Arrays ◽  
Tube Bundles ◽  
Pitch Ratio ◽  
Exchanger Tube

Laboratory experiments were conducted to determine the flow-induced vibration response and fluidelastic instability threshold of model heat exchanger tube bundles subjected to a cross-flow of refrigerant 11. Tube bundles were specially built with tubes cantilever-mounted on rectangular brass support bars so that the stiffness in the streamwise direction was about double that in the transverse direction. This was designed to simulate the tube dynamics in the U-bend region of a recirculating-type nuclear steam generator. Three model tube bundles were studied, one with a pitch ratio of 1.49 and two with a smaller pitch ratio of 1.33. The primary intent of the research was to improve our understanding of the flow-induced vibrations of heat exchanger tube arrays subjected to two-phase cross-flow. Of particular concern was to compare the effect of the asymmetric stiffness on the fluidelastic stability threshold with that of axisymmetric stiffness arrays tested most prominently in literature. The experimental results are analyzed and compared with existing data from literature using various definitions of two-phase fluid parameters. The fluidelastic stability thresholds of the present study agree well with results from previous studies for single-phase flow. In two-phase flow, the comparison of the stability data depends on the definition of two-phase flow velocity.

Statistical Analysis for Partial Inspection of Heat Exchanger Tube Bundles

2014 ◽  
Author(s):  
M. Alathba ◽  
R. Jones ◽  
N. Laycock ◽  
F. Hoeve ◽  
A. Ostrowska ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Heat Exchanger ◽  
Heat Exchanger Tube ◽  
Tube Bundles ◽  
Exchanger Tube

scholarly journals Evaluation of the Ratio of Heat Exchanging Tube Finning on Heat Exchanger Efficiency

2021 ◽  
Vol 346 ◽  
pp. 03028
Author(s):  
Mihail Khizhov ◽  
Lubov Mironova
Keyword(s):  
Heat Exchanger ◽  
Full Scale ◽  
Heat Exchanger Tube ◽  
Tube Bundles ◽  
Exchanger Tube

For the purpose of thermal and hydraulic and aerodynamic testing of the heat exchanger tube bundles, various full-scale tube specimens with different finning ratio have been proposed. Formulas that allow to evaluate the effect of the ratio of heat exchanging tube finning on the heat exchanger efficiency are presented.

ICONE15-10146 DAMPING IN HEAT EXCHANGER TUBE BUNDLES : A REVIEW

2007 ◽  
Vol 2007.15 (0) ◽  
pp. _ICONE1510-_ICONE1510
Author(s):  
Qamar Iqbal ◽  
Shahab Khushnood ◽  
Ali Roheim El Ghalban ◽  
Nadeem Ahmed Sheikh ◽  
Muhammad Afzaal Malik ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Heat Exchanger Tube ◽  
Tube Bundles ◽  
Exchanger Tube
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