Asymptotic and numerical analysis of resonance and lock-in by flow-acoustic interaction in an expansion chamber-pipe system
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- A. LANGTHJEM Mikael
- Graduate School of Science and Engineering, Yamagata University
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- NAKANO Masami
- Institute of Fluid Science, Tohoku University
Abstract
<p>The paper is concerned with the generation of sound by the flow through a closed, cylindrical expansion chamber, followed by a long tailpipe. The sound generation is due to self-sustained flow oscillations in the expansion chamber which, in turn, may generate standing acoustic waves in the tailpipe. The main interest is in the interaction between these two sound sources. An analytical, approximate solution of the acoustic part of the problem is obtained via the method of matched asymptotic expansions. The sound-generating flow is represented by a discrete vortex method, which is modified to include the effects of acoustic feedback. It is demonstrated that lock-in of the self-sustained flow oscillations to the resonant acoustic waves in the tailpipe can take place.</p>
Journal
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- Journal of Fluid Science and Technology
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Journal of Fluid Science and Technology 11 (4), JFST0030-JFST0030, 2016
The Japan Society of Mechanical Engineers
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Details 詳細情報について
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- CRID
- 1390001205244873472
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- NII Article ID
- 130006896974
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- ISSN
- 18805558
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed