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The Power Spectral Density Characteristics of Lift and Drag Fluctuation on a Heat Exchanger Circular Tube
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 Title & Authors
The Power Spectral Density Characteristics of Lift and Drag Fluctuation on a Heat Exchanger Circular Tube
Ha, Ji Soo;
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 Abstract
Heat exchanger tube array in a heat recovery steam generator is exposed to the hot exhaust gas flow and it could cause the flow induced vibration, which could damage the heat exchanger tube array. It is needed for the structural safe operation of the heat exchanger to establish the characteristics of flow induced vibration in the tube array. The researches for the flow induced vibration of typical heat exchangers have been conducted and the nondimensional PSD(Power Spectral Density) function with the Strouhal number, fD/U, had been derived by experimental method. The present study examined the results of the previous experimental researches for the nondimensional PSD characteristics by CFD analysis and the basis for the application of flow induced vibration to the heat recovery steam generator tube array would be prepared from the present CFD analysis. For the previous mentioned purpose, the present CFD analysis introduced a single circular cylinder and calculated with the unsteady laminar flow over the cylinder. The characteristics of vortex shedding and lift and drag fluctuation over the cylinder was investigated. The derived nondimensional PSD was compared with the results of the previous experimental researches and the characteristics of lift and drag PSD over a single circular cylinder was established from the present CFD study.
 Keywords
Heat Exchanger;Circular Cylinder;Flow Induced Vibration;Lift Fluctuation;Drag Fluctuation;Power Spectral Density;Karmann Vortex;Unsteady Laminar Flow;FFT;
 Language
Korean
 Cited by
1.
배열회수 보일러 단일 휜튜브의 양력과 항력 변동에 따른 PSD 특성 연구,하지수;이부윤;

한국가스학회지, 2016. vol.20. 2, pp.23-29 crossref(new window)
1.
The Power Spectral Density Characteristics of Lift and Drag Fluctuation of Fin Tube in a Heat Recovery Steam Generator, Journal of the Korean Institute of Gas, 2016, 20, 2, 23  crossref(new windwow)
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