Exploring Flight Effects for Installed Jet Noise using a Wavepacket Sound-Source Model

Huber, Jérôme; Jordan, Peter; Roger, Michel; Gervais, Yves; Lizarazu, Delphine

doi:10.2514/6.2017-3382

Cited by 7 publications

(3 citation statements)

References 30 publications

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“…For these reasons, many experimental and numerical studies have been carried out in the last few years to investigate installation noise. [2][3][4][5][6][7] Studies on simplified jet-flat plate configurations remain important to provide fundamental physical understandings both from the aerodynamic [8][9][10][11] and the acoustic standpoint. To this extent, the shielding/scattering effect of the airframe surface have been investigated by researchers 12,13 whereas near-field and far-field noise generated by a jet installed close to a semi-finite plate has been analyzed by Lawrence et al 14 Wall pressure fluctuations induced by the jet over an infinite flat plate have been extensively investigated in literature 8,[15][16][17][18] for the prediction of the vibro-acoustic response of the aircraft surfaces.…”

Section: Introductionmentioning

confidence: 99%

Wall pressure fluctuations induced by a single stream jet over a semi-finite plate

Meloni

Lawrence

Proenca

et al. 2020

International Journal of Aeroacoustics

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This work provides an experimental investigation into the interaction between a jet flow and a semi-finite plate parallel to the jet. Wall pressure fluctuations have been measured in a high compressible subsonic regime and for different distances between the jet and the plate trailing edge. The experiment has been carried out in the ISVR anechoic Doak Laboratory at the University of Southampton, using wall pressure transducers flush mounted on the plate surface. Signals were acquired in the stream-wise direction along the jet centreline and in the span-wise direction in a region close to the trailing edge. The radial position of the flat plate was fixed very close to the jet axis to simulate a realistic jet–wing configuration. The plate was moved axially in order to investigate four different jet-trailing edge distances and to include measurements upstream of the nozzle exhaust. The acquired database was analyzed in both the frequency and the time domains providing an extensive statistical characterization in terms of spectral uni– and multi–variate quantities as well as high order statistical moments. A wavelet analysis was performed as well to investigate the time evolution of the wall pressure events.

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Section: Introductionmentioning

confidence: 99%

Wall pressure fluctuations induced by a single stream jet over a semi-finite plate

Meloni

Lawrence

Proenca

et al. 2020

International Journal of Aeroacoustics

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“…They showed that the plate-jet interaction causes an amplification of low frequency noise, which alters the far-field measurements at low frequencies. Huber et al 35 investigated the flight effect on noise scattered by the trailing edge of a flat plate. They modeled the flat plate using a tailored Green's function, assuming the plate was semi-infinite, and a boundary element method formulation of the Helmholtz equation.…”

Section: Computational and Theoretical Researchmentioning

confidence: 99%

“…Huber et al. 35 investigated the flight effect on noise scattered by the trailing edge of a flat plate. They modeled the flat plate using a tailored Green’s function, assuming the plate was semi-infinite, and a boundary element method formulation of the Helmholtz equation.…”

Section: Computational and Theoretical Researchmentioning

confidence: 99%

Theoretical investigation of alteration and radiation of large-scale structures due to jet impingement

Miller

Carr

2018

International Journal of Aeroacoustics

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Jet flows impinge on launch pad structures and aircraft carrier deck blast deflectors. Turbulent structures are deformed and acoustic radiation is reflected by the deflector. The coupling of reflected acoustic waves with the instability waves of the jet turbulence increases their amplitude and causes a feedback loop. Resultant far-field acoustic radiation is amplified. This amplification results in additional tones with significant spectral broadening occurring at frequencies corresponding to the constructive interference. We present a simple prediction methodology in the form of an acoustic analogy. The analogy accounts for reflected acoustic waves through a tailored Green's function and models the large-scale structures as spatially and temporarily growing and decaying instability waves. The predictions are compared with two experimental datasets. Predictions compare favorably with measured frequencies and spectral broadening in the far-field.

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Validation of a Jet–Surface Interaction Noise Model in Flight

et al. 2020

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Exploring Flight Effects for Installed Jet Noise using a Wavepacket Sound-Source Model

Cited by 7 publications

References 30 publications

Wall pressure fluctuations induced by a single stream jet over a semi-finite plate

Wall pressure fluctuations induced by a single stream jet over a semi-finite plate

Theoretical investigation of alteration and radiation of large-scale structures due to jet impingement

Validation of a Jet–Surface Interaction Noise Model in Flight

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