The acoustic output produced by a steady airflow through a corrugated duct

Petrie, Ann; Huntley, Ian

doi:10.1016/0022-460x(80)90551-9

Cited by 28 publications

(9 citation statements)

References 8 publications

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“…Effect of confinement ratio on the Strouhal number in periodic systems In periodic systems, a broad range of peak-whistling Strouhal numbers has been observed. For corrugated pipes, a range between 0.3 6 Sr p-w 6 0.5 has been found (Binnie 1961;Petrie & Huntley 1980;Nakamura & Fukamachi 1991;Nakiboglu et al 2010). For multiple side branch systems, a relatively high peak-whistling Strouhal number Sr p-w = 0.6 has been recorded .…”

Section: Effect Of Helical Corrugationsmentioning

confidence: 93%

“…A more frequently observed coupling of shear layers occurs with longitudinal acoustic standing waves in the pipe, see figure 1 (Petrie & Huntley 1980;Nakamura & Fukamachi 1991;Kristiansen & Wiik 2007;Kop'ev, Mironov & Solntseva 2008;Nakiboglu et al 2010). The resulting high-amplitude oscillations control the vortex shedding (Rockwell 1983;Bruggeman et al 1991).…”

Section: Introductionmentioning

confidence: 97%

“…Depending on the application, geometric parameters of corrugated pipes may vary in a fairly large range and it is known that these parameters have a significant effect on the whistling phenomena (Petrie & Huntley 1980;Nakiboglu et al 2010). Thus, in the course of designing silent corrugated pipes, it is an asset for industry to be able to estimate quantitatively the effect of modifications in geometric parameters on the whistling.…”

Section: Introductionmentioning

confidence: 98%

“…However, at critical conditions, the flow through these pipes causes self-sustained oscillations that lead to high-amplitude sound generation, called whistling. These noise problems are encountered in applications such as domestic appliances, ventilation systems and heat exchangers (Petrie & Huntley 1980;Elliott 2005). For applications at elevated operating pressures such as offshore natural gas production systems, self-sustained oscillations also lead to dangerous structural vibrations (Belfroid, Shatto & Peters 2007;Goyder 2009).…”

Section: Introductionmentioning

confidence: 98%

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On the whistling of corrugated pipes: effect of pipe length and flow profile

et al. 2011

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Whistling behaviour of two geometrically periodic systems, namely corrugated pipes and multiple side branch systems, is investigated both experimentally and numerically. Tests are performed on corrugated pipes with various lengths and cavity geometries. Experiments show that the peak-whistling Strouhal number, where the maximum amplitude in pressure fluctuations is registered, is independent of the pipe length. Experimentally, a decrease of the peak-whistling Strouhal number by a factor of two is observed with increasing confinement ratio, i.e. the ratio of pipe diameter to cavity width. A numerical methodology that combines incompressible flow simulations with vortex sound theory is proposed to estimate the acoustic source power in periodic systems. The methodology successfully predicts the Strouhal number ranges of acoustic energy production/absorption and the nonlinear saturation mechanism responsible for the stabilization of the limit cycle oscillation. The methodology predicts peak-whistling Strouhal numbers in agreement with experiments and explains the dependence of the peak-whistling Strouhal number on the confinement ratio. Combined with an energy balance, the proposed methodology is used to estimate the acoustic fluctuation amplitudes.

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Section: Effect Of Helical Corrugationsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

On the whistling of corrugated pipes: effect of pipe length and flow profile

et al. 2011

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“…It has also been found that a relevant Strouhal number describing the phenomenon takes cavity width plus the radius of curvature of the upstream cavity edge as length parameter [6]. Examples of experimental studies giving information on Strouhal and Reynolds numbers, necessary flow velocities, discussions on source positions, etc., for different test pipes, are found in references [7][8][9][10][11]. The works cited above are performed on relatively short narrow bore pipes.…”

Section: Introductionmentioning

confidence: 99%

Aeroacoustic source analysis in a corrugated flow pipe using low-frequency mitigation

Amielh

Anselmet

Jiang

et al. 2014

Journal of Turbulence

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International audienceOur study is focused on a phenomenon often encountered in flow carrying pipes, since flow instabilities caused by geometric features may generate acoustic signals and thereafter interact with these signals in such a way that powerful pure tones are produced. A modern example is found in the so-called "singing risers", or the gas pipes connecting gas production platforms to the transport network. But the flow generated resonance in a fully corrugated circular pipe may be silenced by the addition of relatively low frequency flow oscillations induced by an acoustic generator. Experiments reported here, aimed at investigating in more detail the coupling between the flow in the pipe, the acoustically generated flow oscillations and the emitted resulting noise, are performed in a specifically designed facility. A rectangular transparent channel using glass walls enables us to use optical techniques to describe in detail the flow field in the corrugation vicinity, in addition to more standard hot-wire anemometry and acoustic pressure measurements with microphones, with and without the acoustically generated low-frequency oscillations

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Experimental and Numerical Investigations of the Aeroacoustics in a Corrugated Pipe Flow

Galeron¹,

Mazzoni

Amielh

et al. 2017

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

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Our study is focused on the singing risers phenomenon which is encountered in corrugated channels under flow. Internal corrugations are responsible for flow instabilities that synchronize with longitudinal acoustic modes of the channel giving powerful pure tones. Experiments are performed in a specifically designed facility. Numerical simulations of the flow based on a lattice Boltzmann method (LBM) are faced to the experimental results. They aimed at investigating the ability of a LBM based simulation to predict the aeroacoustics of corrugated channels. Acoustic modes and turbulence in the corrugated channel are quite well predicted except the sound pressure levels that need better description of the acoustic boundary conditions.

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The acoustic output produced by a steady airflow through a corrugated duct

Cited by 28 publications

References 8 publications

On the whistling of corrugated pipes: effect of pipe length and flow profile

On the whistling of corrugated pipes: effect of pipe length and flow profile

Aeroacoustic source analysis in a corrugated flow pipe using low-frequency mitigation

Experimental and Numerical Investigations of the Aeroacoustics in a Corrugated Pipe Flow

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