Aeroacoustic response of an array of tubes with and without bias-flow
| Autor: | Susann Boij, Hans Bodén, Maria A. Heckl, Luck Peerlings, Aswathy Surendran, A Avraham Hirschberg |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Low-frequency response
Acoustics and Ultrasonics Acoustics Flow (psychology) 02 engineering and technology 01 natural sciences 010305 fluids & plasmas symbols.namesake 0203 mechanical engineering 0103 physical sciences Heat exchanger Limit (music) Aeroacoustics Point (geometry) Transmission coefficient QC Physics Mechanical Engineering Low mach number bias-flow Condensed Matter Physics Tube array 020303 mechanical engineering & transports Electricity generation Mechanics of Materials symbols Strouhal number Duct flow |
| Zdroj: | Journal of Sound and Vibration, 434, 1-16. Academic Press Inc. |
| ISSN: | 0022-460X |
| Popis: | Heat exchangers, consisting of tube arrays in a cross-flow are a vital component of power generation systems. They are of interest from an acoustic point of view, because they can reflect, transmit and absorb an incident sound wave; in other words, they have the potential to act as a sound absorber and even as a passive control device to prevent a thermoacoustic instability in the power generation system. This paper presents a fundamental study of the aeroacoustic response of a tube array with and without bias-flow (also called cross-flow). The study has a theoretical and experimental side. On the theoretical side, a new model, based on the assumption of quasi-steady flow, was developed to predict the acoustic reflection and transmission coefficient of a tube array with bias-flow. Also, the model by Huang and Heckl (Huang and Heckl, 1993, Acustica 78, 191–200) for the case without bias-flow was evaluated. On the experimental side, flow-duct experiments using a multi-microphone technique were performed to validate the predictions from both models. The agreement was found to be very good for low frequencies. The measurements revealed the limit of validity of the quasi-steady model in terms of the Strouhal number. Although this limit is quite low, our quasi-steady model can serve as a valuable tool for designers of heat exchangers. |
| Databáze: | OpenAIRE |
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