Summary
Experimental results of pressure fluctuations measured at the wall of a circular pipe downstream of a discontinuous area enlargement are presented. Close to the nozzle where the fluid enters the pipe like a jet, the wall pressure is generally dominated by turbulence, but farther downstream, under certain conditions, by sound which is sensitive to the acoustic pipe end conditions. By comparison with a pipe inlet flow it is found that the noise is mainly generated by the jet flow region. The agreement with results of acoustic duct theory based on uniform mean flow is good.
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References
Kerschen, E.J.; Johnston, J.P.: Modal content of noise generated by a coaxial jet in a pipe. J. Sound Vibr. 76 (1981) 95–115.
Davies, H.G.; Ffowcs Williams, J.E.: Aerodynamic sound generation in a pipe. J. Fluid Mech. 32 (1968) 765–778.
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© 1986 Springer, Berlin Heidelberg
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Stahl, B., Michalke, A. (1986). On Noise Generated by Turbulence in a Pipe Downstream of a Discontinuous Area Enlargement. In: Comte-Bellot, G., Williams, J.E.F. (eds) Aero- and Hydro-Acoustics. IUTAM Symposia. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-82758-7_35
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DOI: https://doi.org/10.1007/978-3-642-82758-7_35
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-82760-0
Online ISBN: 978-3-642-82758-7
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