Acoustic resonance and pressure drop through a staggered tube bundle in a compact heat exchanger

Kim, Jaemin; Choi, Byoung Ik; Kim, Kui-Soon; Ha, Man Yeong; Son, Changmin; Yoon, Sang Youl

doi:10.1016/j.ijheatmasstransfer.2015.07.084

Cited by 6 publications

(2 citation statements)

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“…The acoustic natural frequency is independent of the flow velocity. A resonance phenomenon occurs at a certain velocity when the vortex shedding and acoustic natural frequencies coincide [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. When the flow velocity increases, the vortex shedding frequency suddenly locks on to the acoustic natural frequency of the duct.…”

Section: Introductionmentioning

confidence: 99%

“…They have found that dynamic lift fluctuation on the cylinders and strong in-phase vortex shedding synchronization are generated by the acoustic resonance. Thus, the self-sustained tone has been studied and the generation mechanism has been experimentally and numerically clarified [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation of High Level Sound Generated in Boiler tube Bank Duct

Mori¹,

Masumoto²,

Ishihara³

2018

IJEAS

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Heat exchangers and boilers are widely used in various plants such as power plants and chemical plants. In heat exchangers and boilers, tube banks are set in a duct such that water passes through inside the tubes and warm gas outside the tubes. Due to the external flow around tube banks, the resonance phenomenon called the self-sustained tone occurs at a certain velocity. The self-sustained tone might cause noise problems in the surroundings, cause losses due to plant shutdown, etc. The self-sustained tone has been studied, and the generation mechanism has been experimentally and numerically clarified. In this paper, we have performed numerical simulations of high level sound generated in boiler tube bank duct with the flow and an acoustic simulation without the flow for a practical generation prediction of a self-sustained tone. The results show a good agreement with measurement data, and that acoustic resonance phenomenon has been numerically captured and clarified. There is the slight difference in the resonance frequencies obtained from the acoustic simulation (without the flow) by means of BEM and the CFD simulation or the experiments due to the absence or presence of the flow.

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