Noise sources localization in the rrj-95 aircraft pressure cabin by spherical microphone array. Part 2. Passenger cabin

Aeronautical and Space-Rocket Engineering

Design, construction and manufacturing of flying vehicles


DOI: 10.34759/vst-2020-3-60-72

Аuthors

Moshkov P. A.1*, Vasilenkov D. A.2**, Rubanovskii V. V.1***, Stroganov A. I.2****

1. Yakovlev Corporation Regional Aircraft Branch, 26, Leninskaya Sloboda str., Moscow, 115280, Russia
2. Siemens Industry Software, SISW, 9, B. Tatarskaya str, Moscow, 115184, Russia

*e-mail: moshkov89@bk.ru, p_moshkov@ssj.irkut.com
**e-mail: dmitri.vasilenkov@siemens.com
***e-mail: V_Rubanovsky@scac.ru
****e-mail: alexey.stroganov@siemens.com

Abstract

The relevance of the problem of enhanced acoustic comfort ensuring for passengers and cockpit personnel is beyond doubt. In particular, at present, there is a problem of professional diminished hearing among the aircrew members of civil aviation aircraft of Russia. The risk factor of this malady development is the noise inside the cockpit.

The problem solution of acoustic comfort ensuring in the cabin is impossible without fulfilling a complex of engineering and fundamental studies at all stages of creation of new samples of aerotechnics. One of the trends of the studies is identification, localization and ranging by intensity the main noise sources in the cabin of the aircraft-prototype. The results of this study are necessary to ensure optimal placement of sound proof, sound absorbing and vibration-damping materials in the onboard structure, and issue recommendations on noise reduction of the air conditioning and ventilation system.

The article presents the results of localization and ranging by the intensity of the noise sources in the RRJ-95 aircraft cockpit, employing the 3DCAM54 spherical array.

Acoustic measurements were performed on the RRJ-95 experimental aircraft No 95005 with the cockpit, updated from the viewpoint of noise reduction and reverberation disturbance. The tests were performed at the cruise speed mode at the altitude of 11 km, determined by the flight Mach number of 0.8.

Measurements were performed at the routine operation mode of the air conditioning and ventilation system and at its turn-off.

As the result of the conducted studies, the noise sources localization maps in the one-third-octave frequency bands of 630-3150 Hz were obtained. The main noise sources in the cabin are the air conditioning and ventilation system (ACVS) and the noise of the turbulent boundary layer. As far as the air feeding is being terminated after the ACVS turn-off, but the fans are not turned-off, the ACVS impact manifests itself while its turn-off from the side of ducts feeding air to the cockpit. The two basic mechanisms can be outlined in the ACSV noise. In particular, in the noise of the one-third-octave frequency band of 1000 Hz, the ACVS turbulent flow dominates the noise caused by the "rotor-stator’ interaction in the ACVS fans. In the one-third-octave frequency band of 1250-2500 Hz the noise of "rotor-stator’ interaction prevails while fans operation.

Keywords:

civil aircraft, acoustic tests, microphone array, spherical beam-forming, cabin noise, noise sources localization map

References

  1. Moshkov P.A. Problems of civil aircraft design with regard to cabin noise requirements. Aerospace MAI Journal, 2019, vol. 26, no. 4, pp. 28-41. DOI: 10.34759/vst-2019-4-28-41

  2. Kop’ev V.F. Polet. Obshcherossiiskii nauchno-tekhnicheskii zhurnal, 2018, no. 11, pp. 60-69.

  3. Dutov A.V., Sypalo K.I., Toporov N.B. Polet. Obshcherossiiskii nauchno-tekhnicheskii zhurnal, 2018, no. 11, pp. 77–86.

  4. Dutov A.V., Sypalo K.I., Toporov N.B., Nesterov V.A. Izvestiya Rossiiskoi akademii raketnykh i artilleriiskikh nauk, 2018, no. 4(104), pp. 23–30.

  5. Samokhin V.F., Munin A.G., Kuznetsov V.S. Polet. Obshcherossiiskii nauchno-tekhnicheskii zhurnal, 2009, no. 1, pp. 9–13.

  6. Dmitriev V.G., Munin A.G., Samokhin V.F., Chernyshev S.L. Polet. Obshcherossiiskii nauchno-tekhnicheskii zhurnal, 2009, no. 10, pp. 15–22.

  7. Anisimov K.S., Kazhan E.V., Kursakov I.A., Lysenkov A.V., Podaruev V.Y., Savel’ev A.A. Aircraft layout design employing high-precision methods of computational aerodynamics and optimization. Aerospace MAI Journal, 2019, vol. 26, no. 2, pp. 7-19.

  8. Moshkov P.A., Vasilenkov D.A., Rubanovskii V.V., Stroganov A.I. Noise sources localization in the RRJ-95 aircraft pressure cabin by spherical microphone array. Part 1. Cockpit. Aerospace MAI Journal, 2020, vol. 27, no. 2, pp. 37–51. DOI: 10.34759/vst-2020-2-37-51

  9. Lavrov V.N., Moshkov P.A., Popov V.P., Rubanovskiy V.V. Materialy Shestoi Otkrytoi Vserossiiskoi (XVIII nauchno-tekhnicheskoi) konferentsii po aeroakustike (22- 27 September 2019, Zvenigorod), Moscow, TsAGI, 2019, pp. 241-242.

  10. 10. Lavrov V., Moshkov P., Popov V., Rubanovskiy V. Study of the Sound Field Structure in the Cockpit of a Superjet 100. 25th AIAA/CEAS Aeroacoustics Conference, 2019.   AIAA Paper No. 2019-2726. DOI: 10.2514/6.2019-2726

  11. Abdrashitov R.G., Arkhireeva E.Yu., Dan’kov B.N., Men’shov I.S., Severin A.V., Semenov I.V., Trebunskikh T.V. Uchenye zapiski TsAGI, 2012, vol. XLIII, no. 4, pp. 39–56.

  12. Duben’ A.P., Zhdanova N.S., Kozubskaya T.K. Numerical investigation of the deflector effect on the aerodynamic and acoustic characteristics of turbulent cavity flow. Fluid Dynamics, 2017, vol. 52, no. 4, pp. 561-571. DOI: 10.1134/S001546281704010X

  13. Semiletov V.A., Yakovlev P.G., Karabasov S.A., Faranosov G.A., Kopiev V.F. Jet and jet–wing noise modelling based on the cabaret miles flow solver and the Ffowcs Williams–Hawkings method. International Journal of Aeroacoustics, 2016, vol. 15, no. 6-7, pp. 631–645. DOI: 10.1177/1475472X16659387

  14. Samokhin V., Moshkov P., Yakovlev A. Analytical model of engine fan noise, Akustika, 2019, vol. 32, pp. 168–173.

  15. Belyaev I.V., Zaytsev M.Y., Kopiev V.F., Ostrikov N.N., Faranosov G.A. Studying the effect of flap angle on the noise of interaction of a high-bypass jet with a swept wing in a co-flow. Acoustical Physics, 2017, vol. 63, no. 1, pp. 14-25. DOI: 10.1134/S1063771016060026

  16. Golubev A.Yu. Prostranstvenno-vremennaya struktura neodnorodnykh polei pul’satsii davleniya na poverkhnosti samoleta (Space-time structure of inhomogeneous pressure pulsation fields on the aircraft surface), Doctor’s thesis, Perm, PNIPU, 2016, 32 p.

  17. Aksenov A.A., Gavrilyuk V.N., Timushev S.F. Numerical simulation of tonal fan noise of computers and air conditioning systems. Acoustical Physics, 2016, vol. 62, no. 4, pp. 447-455. DOI: 0.1134/S1063771016040011

  18. Bazhenova L.A. Noise Sources of Aerodynamic Origin in Air Blowers. Acoustical Physics, 2018, vol. 64, no. 3, pp. 356-364. DOI: 10.1134/S1063771018030028

  19. Tanonin M.S., Kostromitinov S.V. Izvestiya Samarskogo nauchnogo tsentra Rossiiskoi akademii nauk, 2018, vol. 20, no. 4(3), pp. 362–369.

  20. Baklanov V.S. Role of structural noise in aircraft pressure cockpit from vibration action of new-generation engines, Acoustical Physics, 2016, vol. 62, no. 4, pp. 456-461. DOI: 10.1134/S1063771016040047

  21. Moshkov P.A., Samokhin V.F., Yakovlev A.A. Izvestiya vysshikh uchebnykh zavedenii. Aviatsionnaya tekhnika, 2018, no. 4, pp. 126–128.

  22. Samokhin V.F., Moshkov P.A. Izvestiya vysshikh uchebnykh zavedenii. Aviatsionnaya tekhnika, 2020, no. 1, pp. 117–120.

  23. Gorbovskoi V.S., Kazhan A.V., Kazhan V.G., Shenkin A.V. Numerical studies of nozzle thrust characteristics of supersonic civil aircraft by computational gas dynamics method. Aerospace MAI Journal, 2019, vol. 26, no. 4, pp. 7-16. DOI: 10.34759/vst-2019-4-7-16

  24. Scamoni F., Piana E.A., Scrosati C. Experimental evaluation of the sound absorption and insulation of an innovative coating through different testing methods. Building Acoustics, 2017, vol. 24, no. 3, pp. 173–191. DOI: 10.1177/1351010X17728596

  25. Zverev A.Ya., Chernykh V.V. Uchenye zapiski TsAGI, 2018, vol. 49, no. 8, pp. 40–55.

  26. Bobrovnitskii Yu.I., Tomilina T.M., Bakhtin B.N., Grebennikov A.S., Asfandiyarov Sh.A., Karpov I.A., Kim A.A. Akusticheskii zhurnal, 2020, vol. 66, no. 3, pp. 332–341. DOI: 10.31857/S0320791920030016

  27. Abdrashitov R., Golubev A. Identification of sources of noise in the cabin and the definition of the local passage of sound energy through fuselage based on the results of in-flight measurements of the Superjet. 21st AIAA/CEAS Aeroacoustics Conference. AIAA Paper No. 2015-3114. 2015. DOI: 10.2514/6.2015-3114

  28. Hu N., Buchholz H., Herr M., Spehr C. Haxter S. Contributions of Different Aeroacoustic Sources to Aircraft Cabin Noise, 19th AIAA/CEAS Aeroacoustics Conference, 2013, AIAA Paper. 2013-2030. DOI:10.2514/6.2013-2030

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