Time domain simulations of radiation from ducted fans with liners

Y. Ozyoruk, V. Ahuja, Lyle Norman Long

Research output: Contribution to conferencePaper

9 Citations (Scopus)

Abstract

Over the last few decades, noise related concerns have played a major role in the development of aircraft engines. The previously dominant jet noise mechanisms are now being replaced by tonal and broadband noise from the fan and interactions from the fan wakes and the downstream stator. Alternately, engine inlet and exhaust ducts are being fitted with sophisticated liner materials that aid in damping fan related noise. In this paper, the authors investigate the radiation problem from the engine inlets with the aid of numerical simulations of the Euler/Navier-Stokes equations coupled with a time-domain methodology that analyzes the impedance characteristics of liner materials. In doing so, the authors present a simulation capability that can be used to identify and analyze tonal noise from high bypass ratio engines with acoustically treated nacelles. In this paper, we carry out numerical experiments and present results of radiation from two different engine inlet geometries with lined ducts.

Original languageEnglish (US)
StatePublished - Dec 1 2001
Event7th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2001 - Maastricht, Netherlands
Duration: May 28 2001May 30 2001

Other

Other7th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2001
CountryNetherlands
CityMaastricht
Period5/28/015/30/01

Fingerprint

ducted fans
engine inlets
linings
Fans
fans
Engines
Radiation
radiation
ducts
Ducts
nacelles
bypass ratio
simulation
Bypass ratio
jet aircraft noise
aircraft engines
Aircraft engines
stators
wakes
Navier-Stokes equation

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Acoustics and Ultrasonics

Cite this

Ozyoruk, Y., Ahuja, V., & Long, L. N. (2001). Time domain simulations of radiation from ducted fans with liners. Paper presented at 7th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2001, Maastricht, Netherlands.
Ozyoruk, Y. ; Ahuja, V. ; Long, Lyle Norman. / Time domain simulations of radiation from ducted fans with liners. Paper presented at 7th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2001, Maastricht, Netherlands.
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abstract = "Over the last few decades, noise related concerns have played a major role in the development of aircraft engines. The previously dominant jet noise mechanisms are now being replaced by tonal and broadband noise from the fan and interactions from the fan wakes and the downstream stator. Alternately, engine inlet and exhaust ducts are being fitted with sophisticated liner materials that aid in damping fan related noise. In this paper, the authors investigate the radiation problem from the engine inlets with the aid of numerical simulations of the Euler/Navier-Stokes equations coupled with a time-domain methodology that analyzes the impedance characteristics of liner materials. In doing so, the authors present a simulation capability that can be used to identify and analyze tonal noise from high bypass ratio engines with acoustically treated nacelles. In this paper, we carry out numerical experiments and present results of radiation from two different engine inlet geometries with lined ducts.",
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Ozyoruk, Y, Ahuja, V & Long, LN 2001, 'Time domain simulations of radiation from ducted fans with liners' Paper presented at 7th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2001, Maastricht, Netherlands, 5/28/01 - 5/30/01, .

Time domain simulations of radiation from ducted fans with liners. / Ozyoruk, Y.; Ahuja, V.; Long, Lyle Norman.

2001. Paper presented at 7th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2001, Maastricht, Netherlands.

Research output: Contribution to conferencePaper

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T1 - Time domain simulations of radiation from ducted fans with liners

AU - Ozyoruk, Y.

AU - Ahuja, V.

AU - Long, Lyle Norman

PY - 2001/12/1

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AB - Over the last few decades, noise related concerns have played a major role in the development of aircraft engines. The previously dominant jet noise mechanisms are now being replaced by tonal and broadband noise from the fan and interactions from the fan wakes and the downstream stator. Alternately, engine inlet and exhaust ducts are being fitted with sophisticated liner materials that aid in damping fan related noise. In this paper, the authors investigate the radiation problem from the engine inlets with the aid of numerical simulations of the Euler/Navier-Stokes equations coupled with a time-domain methodology that analyzes the impedance characteristics of liner materials. In doing so, the authors present a simulation capability that can be used to identify and analyze tonal noise from high bypass ratio engines with acoustically treated nacelles. In this paper, we carry out numerical experiments and present results of radiation from two different engine inlet geometries with lined ducts.

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Ozyoruk Y, Ahuja V, Long LN. Time domain simulations of radiation from ducted fans with liners. 2001. Paper presented at 7th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2001, Maastricht, Netherlands.