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Analysis Of Flow Induced Vibration In Superheater Tube Bundles In Utility Boilers Using Computational Method

Analysis Of Flow Induced Vibration In Superheater Tube Bundles In Utility Boilers Using Computational Method,Aditya Kumar Pandey,L. A. Kumaraswamidhas

Analysis Of Flow Induced Vibration In Superheater Tube Bundles In Utility Boilers Using Computational Method  
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Flow induced vibration in tube bundles subjected to cross flow has been known for a long time. In boilers, tube bundles carrying steam or water are subjected to cross flow of flue gases. This flow causes external forces which may generate vibrations and sound in the boiler during their regular operation. These vibrations can result in tube thinning at support points and consequent leakage or damage to tubes, damage to structural attachments as well as insulation cladding provided around the enclosure. Hence, it is required to predict the occurrence of flow induced vibrations early-on and address the problem. This paper focuses on the flow induced vibration phenomenon of vortex shedding and acoustic resonance in horizontal Low Temperature Superheater (LTSH) tube bundles in utility boilers at full load operation. Computational fluid dynamics tools have been used to perform the flow analysis. The results have been used to predict the occurrence of vortex shedding and acoustic resonance phenomenon and to calculate the amplitude of vibration. Validation has been conducted as per experimental results and confirmed that the methodology adopted holds suitable. The sources of error and their effect on the model in deviation of the conditions from the actual ones have also been discussed.
Published in 2012.
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