Linear analysis of jet-engine core noise based upon high-fidelity combustor and turbine simulations

Jeff O’Brien, Jeonglae Kim, Matthias Ihme

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

As further reductions in aircraft engine noise are realized, the relative importance of engine core noise increases. In this study, a computational framework for examining in- direct core noise is proposed, consisting of a representative engine flow-path containing a model gas turbine combustor, a single-stage turbine, a converging nozzle, and free-field radiation. Combined high-fidelity and lower-order simulation techniques are used for each component of the modeled engine. Preliminary, uncoupled results from the combustor and turbine are presented as well as the nozzle-flow simulations. Particular attention is paid to the verification and performance of a linearized Euler solver for predicting the subsonic heated jet flow as well as its far-field acoustic radiation. Two relevant verification tests are shown as well as the nozzle’s response to time-harmonic excitations in both the presence and absence of the mean jet flow over a range of Strouhal numbers. Future work will in- clude coupling the simulations and a more detailed analysis of the mechanisms of core-noise generation and propagation.

Original languageEnglish (US)
Title of host publication53rd AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103438
DOIs
StatePublished - Jan 1 2015
Externally publishedYes
Event53rd AIAA Aerospace Sciences Meeting, 2015 - Kissimmee, United States
Duration: Jan 5 2015Jan 9 2015

Other

Other53rd AIAA Aerospace Sciences Meeting, 2015
CountryUnited States
CityKissimmee
Period1/5/151/9/15

ASJC Scopus subject areas

  • Aerospace Engineering

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    O’Brien, J., Kim, J., & Ihme, M. (2015). Linear analysis of jet-engine core noise based upon high-fidelity combustor and turbine simulations. In 53rd AIAA Aerospace Sciences Meeting [AIAA 2015-1004] American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2015-1004