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Title
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The Effect of Grid Generated Turbulence on the Fluidelastic Instability Response in Parallel Triangular Tube Array
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Sub-Title |
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Subject |
Upstream turbulence, Tube bundle, Parallel triangular Instability, Flexible tube, Multiple flexible tube, Rocking mode, Translational mode, Stiffness mechanism, Damping mechanism
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Author |
Muhammad Ammar Akram, Shahab Khushnood, Syeda Lara
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Publish Year |
2021 |
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Supervisor |
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Diss#. |
https://doi.org/10.1016/j.anucene.2021.108245 |
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Text Language |
English |
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Accession |
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Library Section |
Research Article |
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Abstract |
This paper deals with the analysis of the grid generated turbulence on flow induced vibration response of the parallel triangular tube bundle with pitch ratio of 1.54. Turbulence characteristics of the upstream flow can highly influence the stability behavior of a single flexible as well as multiple flexible tubes in early rows of tube bundle. Experimentation have been performed in the wind tunnel with the free stream velocity ranging from 0 to 8.9 m/s. Distinct amplitude behavior for the monitored tube has been observed for each row in both streamwise and the transverse direction. With the increase in the upstream turbulence, the stability threshold of the monitored tube tends to be delayed for single flexible case, however for the multiple flexible case the stability threshold tends to move towards early values. This indicates the importance of stiffness mechanism in generating instability in the monitored tube, which is enhanced by upstream turbulence. Surprisingly, upstream turbule
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