CABARET Method on Unstructured Hexahedral Grids for Jet Noise Computation

Faranosov, G. A.; Goloviznin, V. M.; Karabasov, Sergey A.; Kondakov, Vasily G.; Kopiev, V. F.; Zaitsev, M. Yu.

doi:10.2514/6.2012-2146

Cited by 13 publications

(23 citation statements)

References 20 publications

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“…17 ussian Foundation for B e authors would also like to gratefully acknowledge communications with Prof. G.N.Lavrukhin (TsAGI) and Mr. Gennady Paranin (JSC IRKUT Corporation), Russia.…”

Section: Resultsmentioning

confidence: 99%

Intensification and suppression of jet noise sources in the vicinity of lifting surfaces

Kopiev¹,

Faranosov²,

Zaitsev³

et al. 2013

19th AIAA/CEAS Aeroacoustics Conference

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Theoretical and an experimental investigations of jet noise modification are carried out for the jet issuing in the vicinity of the wing. The effect of interaction between instability waves in the jet and flap solid boundaries has been studied. Expermental investigation of jet noise from a dual flow nozzles near a wing provides assessment of several parameters (chevrons on primary and secondary nozzles, distance between the trailing edge of the flap and the nozzle, distance between the plane of the wing to the jet axis, presence of the pylon, etc.) on jet noise installation effect.

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“…17 ussian Foundation for B e authors would also like to gratefully acknowledge communications with Prof. G.N.Lavrukhin (TsAGI) and Mr. Gennady Paranin (JSC IRKUT Corporation), Russia.…”

Section: Resultsmentioning

confidence: 99%

Intensification and suppression of jet noise sources in the vicinity of lifting surfaces

Kopiev¹,

Faranosov²,

Zaitsev³

et al. 2013

19th AIAA/CEAS Aeroacoustics Conference

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“…in Refs. 18, 39, that cross- From (11) it follows that in order to assess the mean amplitudes of round jet noise azimuthal modes, one needs to measure the far-field sound by at least 3 microphones at each jet cross section (with fixed r and χ ). Indeed, in this case we obtain the following system 3 1 3 2 3 2 3 3 3 os ( , , ) sin ( , , ) cos 2 ( , , ) sin 2 ( , , , ) ( ).…”

Section: Generalization Of Adt and Its Application To The Small-mentioning

confidence: 99%

Adaptation of the Azimuthal Decomposition Technique to Jet Noise Measuerements of an Aircraft Engine in the Ground Tests

Kopiev¹,

Belyaev²,

Faranosov³

et al. 2015

21st AIAA/CEAS Aeroacoustics Conference

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For effective development of jet noise reduction concepts, it is necessary to understand the physics underlying noise generation process. One of experimental methodsAzimuthal Decomposition Technique (ADT) -which allows extracting subtle features of noise sources of different types, was elaborated in TsAGI. ADT was successfully applied to the analysis of jet noise sources at small-scales. In laboratory tests, ADT is realized by a circular 6-microphone array with uniformly distributed microphones located in the acoustic far field of the jet. In the present paper, we present a generalization of this method for the case of azimuthally nonuniform microphones distribution with the view of its application to the analysis of large-scale jet noise. It is shown that jet noise measurements by only 3 microphones in each cross-section allow reconstruction of 3 azimuthal modes directivities (axisymmetric, 1 st and 2 nd ) for low and moderate frequency bands, while 2-microphone measurements make it possible to reconstruct axisymmetric mode directivity and sum directivity of 1 st and 2 nd modes, the microphones being properly located. The latter method is shown to be suitable for utilizing on an outdoor test bench. At first stage, the modified methodology is validated on the small-scale laboratory database, and then it is applied to the jet issuing from the real engine in the ground tests. The information about the azimuthal modes properties is used to investigate physical aspects of the large-scale jet noise sources.

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“…Noise of the rotor was calculated with a postprocessor based on the FWH formula [10] that explicitly takes into account the presence of uniform flow. The postprocessor was validated in a previous study on jet noise simulation [11]. Two kinds of FWH surfaces were used: the impermeable surface on the rotor blades, and a permeable cylindrical surface enclosing the rotor.…”

Section: Figure 8 Mesh Cut Of the Volume Mesh Together With The Propmentioning

confidence: 99%

Comparison of rotor noise measurement results in large-scale and small-scale anechoic facilities

Belyaev¹,

Kopiev²,

Skvortsov³

et al. 2015

21st AIAA/CEAS Aeroacoustics Conference

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To enable rotor noise tests in anechoic chamber AC-2 of TsAGI, the facility has been modified and a rotor rig has been specifically designed and manufactured. An experimental study of geometrically similar models of APIAN-INF rotor has been performed in smallscale anechoic chamber AC-2 of TsAGI and in large-scale anechoic wind tunnel DNW-LLF, allowing the comparison between the results. The dimension of the rotor model tested in TsAGI was 60% of the model tested in DNW-LLF. Numerical simulations of the aerodynamic and acoustic characteristics of the rotors have also been carried out. The data obtained in DNW-LLF were used for validation of the numerical results, as well as of the experimental data obtained in AC-2.

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CABARET Method on Unstructured Hexahedral Grids for Jet Noise Computation

Cited by 13 publications

References 20 publications

Intensification and suppression of jet noise sources in the vicinity of lifting surfaces

Intensification and suppression of jet noise sources in the vicinity of lifting surfaces

Adaptation of the Azimuthal Decomposition Technique to Jet Noise Measuerements of an Aircraft Engine in the Ground Tests

Comparison of rotor noise measurement results in large-scale and small-scale anechoic facilities

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