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Investigations on flow and flow-indu...

Bhattacharya, Alokendu.

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Investigations on flow and flow-induced vibration of CANDU fuel bundles.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Investigations on flow and flow-induced vibration of CANDU fuel bundles./
Author:	Bhattacharya, Alokendu.
Description:	149 p.
Notes:	Source: Dissertation Abstracts International, Volume: 75-06(E), Section: B.
Contained By:	Dissertation Abstracts International75-06B(E).
Subject:	Engineering, Industrial. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NS22329
ISBN:	9780499223296

Investigations on flow and flow-induced vibration of CANDU fuel bundles.
Bhattacharya, Alokendu.

Investigations on flow and flow-induced vibration of CANDU fuel bundles. - 149 p.

Source: Dissertation Abstracts International, Volume: 75-06(E), Section: B.

Thesis (Ph.D.)--Ryerson University (Canada), 2013.

Excitations induced by three-dimensional unsteady flows of ordinary water coolant through a string of CANDU fuel bundles in a fuel channel are investigated in this thesis. Several comprehensive computational fluid dynamics (CFD) models are developed and solved by means of large eddy simulation (LES), high performance computers and parallel processing scheme. The 12-bundle flow model is the first ever developed concerning flow in a very complex CANDU fuel channel. The lateral fluid flow and flow-induced excitations on every fuel bundle are obtained and analyzed for various combinations of bundle angular positions. The coherent nature of the flow through the multiple bundles inside the fuel channel exhibiting fluid excitations of frequencies spreaded over a wide band in the power spectra is a source of bundle lateral vibration. The flow features of different bundle regime are correlated both in time and frequency domain and they are sensitive to the bundle-to-bundle angular position. This finding directs that, to study the flow and flow-induced excitations and vibrations of a bundle string, it is necessary to include all bundles for fluid-structure interactions. Results from the computational model reveal that the misaligned interface changes the flow pattern in the fuel channel. The mean lateral fluid forces increase by an order of magnitude and their RMS values raise about 3 to 4 times at some configurations compared to fully aligned situation. Experiments are also performed using the simulated CANDU bundles in an out-reactor setup to verify the computational results. An analysis of a complete fuel channel of a nuclear reactor using LES is at the forefront of current research worldwide and this study is a major step forward towards understanding and unfolding the fuel bundle vibration phenomenon.

ISBN: 9780499223296Subjects--Topical Terms:

626639
Engineering, Industrial.

Investigations on flow and flow-induced vibration of CANDU fuel bundles.
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020 $a 9780499223296
035 $a (MiAaPQ)AAINS22329
035 $a AAINS22329
040 $a MiAaPQ $c MiAaPQ
100 1 $a Bhattacharya, Alokendu. $3 2100730
245 1 0 $a Investigations on flow and flow-induced vibration of CANDU fuel bundles.
300 $a 149 p.
500 $a Source: Dissertation Abstracts International, Volume: 75-06(E), Section: B.
502 $a Thesis (Ph.D.)--Ryerson University (Canada), 2013.
520 $a Excitations induced by three-dimensional unsteady flows of ordinary water coolant through a string of CANDU fuel bundles in a fuel channel are investigated in this thesis. Several comprehensive computational fluid dynamics (CFD) models are developed and solved by means of large eddy simulation (LES), high performance computers and parallel processing scheme. The 12-bundle flow model is the first ever developed concerning flow in a very complex CANDU fuel channel. The lateral fluid flow and flow-induced excitations on every fuel bundle are obtained and analyzed for various combinations of bundle angular positions. The coherent nature of the flow through the multiple bundles inside the fuel channel exhibiting fluid excitations of frequencies spreaded over a wide band in the power spectra is a source of bundle lateral vibration. The flow features of different bundle regime are correlated both in time and frequency domain and they are sensitive to the bundle-to-bundle angular position. This finding directs that, to study the flow and flow-induced excitations and vibrations of a bundle string, it is necessary to include all bundles for fluid-structure interactions. Results from the computational model reveal that the misaligned interface changes the flow pattern in the fuel channel. The mean lateral fluid forces increase by an order of magnitude and their RMS values raise about 3 to 4 times at some configurations compared to fully aligned situation. Experiments are also performed using the simulated CANDU bundles in an out-reactor setup to verify the computational results. An analysis of a complete fuel channel of a nuclear reactor using LES is at the forefront of current research worldwide and this study is a major step forward towards understanding and unfolding the fuel bundle vibration phenomenon.
590 $a School code: 1428.
650 4 $a Engineering, Industrial. $3 626639
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Engineering, General. $3 1020744
690 $a 0546
690 $a 0548
690 $a 0537
710 2 $a Ryerson University (Canada). $3 1029949
773 0 $t Dissertation Abstracts International $g 75-06B(E).
790 $a 1428
791 $a Ph.D.
792 $a 2013
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NS22329