21st AIAA/CEAS Aeroacoustics Conference 2015
DOI: 10.2514/6.2015-2670
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Synthetic Turbulence Methods for Leading Edge Noise Predictions

Abstract: An advanced digital filter method to generate synthetic turbulence is presented for efficient two-and three-dimensional leading edge noise predictions. The technique, which is based on the Random Particle-Mesh method, produces a turbulent inflow that matches a target isotropic energy spectrum. The discretized equations for the synthetic eddies, and the input parameters needed to recover the desired turbulence statistics, are presented. Moreover, a simple and fast implementation strategy, which does not require… Show more

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Cited by 19 publications
(26 citation statements)
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References 41 publications
(57 reference statements)
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“…Above f = 1000 Hz the numerical predictions deviate from the analytical prediction due to the thickness of the NACA 0012 airfoil. This effect is discussed in Gea-Aguilera et al 34 The noise predictions from the various domain sizes are in agreement to within 2 dB at all frequencies. This suggests that the noise predictions are unaffected by the changes in domain size, and that a domain which extends to 3 airfoil chords in all directions is sufficient if the zonal TCBC non-reflective boundary condition is used.…”
Section: Vib Performance Of the Zonal Tcbc Methodssupporting
confidence: 55%
See 2 more Smart Citations
“…Above f = 1000 Hz the numerical predictions deviate from the analytical prediction due to the thickness of the NACA 0012 airfoil. This effect is discussed in Gea-Aguilera et al 34 The noise predictions from the various domain sizes are in agreement to within 2 dB at all frequencies. This suggests that the noise predictions are unaffected by the changes in domain size, and that a domain which extends to 3 airfoil chords in all directions is sufficient if the zonal TCBC non-reflective boundary condition is used.…”
Section: Vib Performance Of the Zonal Tcbc Methodssupporting
confidence: 55%
“…The methodology of this case is now outlined. However, additional detail is given in Gea-Aguilera et al, 34 which uses the same methodology. The purpose of Gea-Aguilera et al 34 is to study turbulence interaction noise, whereas the current work is using this case only to demonstrate the performance of the proposed non-reflective boundary condition.…”
Section: Vib Performance Of the Zonal Tcbc Methodsmentioning
confidence: 99%
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“…The main idea of the weighting function is to realise an arbitrary spectrum E(k) of length scale Λ with the superposition of a limited number of Gaussian spectra E G of length scales l m with 0 ≤ m ≤ M. For this we discretise the integral in Eq. (6) to…”
Section: Discretisationmentioning
confidence: 99%
“…Others have adopted this method for other kinds of spectra, e.g. just recently Gea-Aguilera et al [6] and Kim et al [7] published their findings. Note that the here presented method has already been presented by the authors on conferences, but not derived in detail [8,9].…”
Section: Introductionmentioning
confidence: 99%