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Research Papers: Fluid-Structure Interaction

Prediction of Flow-Induced Vibrations in Tubular Heat Exchangers—Part II: Experimental Investigation

[+] Author and Article Information
S. A. Al-Kaabi

Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, KFUPM Box 1767, Dhahran 31261, Saudi Arabiakaabis@kfupm.edu.sa

Y. A. Khulief1

Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, KFUPM Box 1767, Dhahran 31261, Saudi Arabiakhulief@kfupm.edu.sa

S. A. Said

Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, KFUPM Box 1767, Dhahran 31261, Saudi Arabiasamsaid@kfupm.edu.sa

1

Corresponding author.

J. Pressure Vessel Technol 131(1), 011302 (Nov 10, 2008) (7 pages) doi:10.1115/1.3006951 History: Received January 04, 2007; Revised April 27, 2008; Published November 10, 2008

It has become evident that the modeling of the complex dynamics of fluidelastic forces that give rise to vibrations of tube bundles requires a great deal of experimental insight. Accordingly, the prediction of the flow-induced vibration due to unsteady cross-flow can be greatly aided by semi-analytical models, in which some coefficients are determined experimentally. A laboratory test rig with an instrumented test bundle is constructed to measure the fluidelastic coefficients to be used in conjunction with the mathematical model derived in Part I of this paper. The test rig admits two different test bundles, namely, the inline-square and 45deg rotated-square tube arrays. Measurements were conducted to identify the flow-induced dynamic coefficients. The developed scheme was utilized in predicting the onset of flow-induced vibrations in two configurations of tube bundles, and results were examined in the light of Tubular Exchange Manufacturers Association (TEMA) predictions. The comparison demonstrated that TEMA guidelines are more conservative in the two configurations considered.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

The inline-square tube array (pitch-to-diameter ratio of 1.45)

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Figure 2

The rotated-square tube array (pitch-to-diameter ratio of 2.0)

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Figure 3

The experimental test rig

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Figure 4

The instrumented test section

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Figure 5

(a) Added mass coefficient for the inline-square array and (b) added mass coefficient for the rotated-square array

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Figure 6

(a) Amplitude of fluid-force coefficient for the inline-square array and (b) phase of fluid-force coefficient for the inline-square array

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Figure 7

(a) Amplitude of fluid-force coefficient for the rotated-square array and (b) phase of fluid-force coefficient for the rotated-square array

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Figure 8

Critical velocity estimates for the inline-square array

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Figure 9

Critical velocity estimates for the rotated-square array

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