Reducing jet noise from a biconical nozzle

Sandeep R. Murthy, Daniel J. Bodony

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

Abstract

The intense noise radiated by jet aircraft exhaust nozzles causes structural vibration, fatigue, carrier deck personnel operational difficulties, and community environmental concerns. Prior work into the physics and control of jet noise have identified several important sound sources, including wavepackets, screech, Mach wave radiation, and broadband shock associated noise, to name a few. Reducing the loudest sources of jet noise, without sacrificing propulsive performance, has thus-far relied on intuition, parametric survey, or optimal control techniques. With the aim of developing a more general and robust method of jet noise reduction (JNR), we seek a physics-based JNR approach that is built upon a linear resolvent analysis appropriate for mean flows with strong shocks. The effect of flow discontinuities on linear analysis, including the optimal forcing and response modes that arise from resolvents, is investigated.

Original languageEnglish (US)
Title of host publication30th AIAA/CEAS Aeroacoustics Conference, 2024
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624107207
DOIs
StatePublished - 2024
Externally publishedYes
Event30th AIAA/CEAS Aeroacoustics Conference, 2024 - Rome, Italy
Duration: Jun 4 2023Jun 7 2023

Publication series

Name30th AIAA/CEAS Aeroacoustics Conference, 2024

Conference

Conference30th AIAA/CEAS Aeroacoustics Conference, 2024
Country/TerritoryItaly
CityRome
Period6/4/236/7/23

ASJC Scopus subject areas

  • Mechanical Engineering
  • Aerospace Engineering

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