scholarly journals Numerical Simulations of Unsteady Fluid Forces in Heat Exchanger Tube Bundles

10.5772/25404 ◽  
2011 ◽  
Author(s):  
H. Omar ◽  
M. Hassan ◽  
A. Gerber
Keyword(s):  
Heat Exchanger ◽  
Numerical Simulations ◽  
Heat Exchanger Tube ◽  
Fluid Forces ◽  
Tube Bundles ◽  
Unsteady Fluid ◽  
Exchanger Tube

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.

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

Fluidelastic Instability of Heat Exchanger Tube Bundles: Review and Design Recommendations

1991 ◽  
Vol 113 (2) ◽  
pp. 242-256 ◽  
Author(s):  
M. J. Pettigrew ◽  
C. E. Taylor
Keyword(s):  
Heat Exchanger ◽  
Flow Velocity ◽  
Point Of View ◽  
Heat Exchanger Tube ◽  
Critical Flow Velocity ◽  
Design Point ◽  
Tube Bundles ◽  
Practical Design ◽  
Fluidelastic Instability ◽  
Exchanger Tube

Fluidelastic instability is the most important vibration excitation mechanism for heat exchanger tube bundles subjected to cross-flow. Most of the available data on this topic have been reviewed from the perspective of the designer. Uniform definitions of critical flow velocity for instability, damping, natural frequency and hydrodynamic mass were used. Nearly 300 data points were assembled. We found that only data from experiments where all tubes are free to vibrate are valid from a design point of view. In liquids, fluid damping is important and should be considered in the formulation of fluidelastic instability. From a practical design point of view, we conclude that fluidelastic instability may be expressed simply in terms of dimensionless flow velocity and dimensionless mass-damping. There is no advantage in considering more sophisticated models at this time. Practical design guidelines are discussed.

Acoustic Resonance in Heat Exchanger Tube Bundles—Part II: Prediction and Suppression of Resonance

1987 ◽  
Vol 109 (3) ◽  
pp. 282-288 ◽  
Author(s):  
R. D. Blevins ◽  
M. M. Bressler
Keyword(s):  
Experimental Data ◽  
Heat Exchanger ◽  
Vortex Shedding ◽  
Empirical Model ◽  
Acoustic Resonance ◽  
Heat Exchanger Tube ◽  
Tube Bundles ◽  
Semi Empirical ◽  
Exchanger Tube

In the first part of this series, experimental data were presented which suggest that the acoustic resonance in heat exchanger tube bundles is tied to periodic vortex shedding from the tubes. In this paper, a semi-empirical model for predicting the onset of resonance is developed. This model is compared with experimental data and other models from the literature. Methods of suppressing the resonance are developed and experimental data on their effectiveness are presented.

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.

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