Resolvent analysis of a biconical tactical jet nozzle

Sandeep R. Murthy, Daniel J. Bodony

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

Abstract

The intense noise radiated by supersonic hot jets leads to sound-induced structural vibration, fatigue and personnel-related operational difficulties. Experimental, theoretical, and computational investigations 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. Reducing the loudest sources of jet noise, without sacrificing propulsive performance, has relied on intuition, parametric survey, or optimal control techniques. With the aim of developing a more general and robust method of jet noise reduction, we present a physics-based approach, built upon a linear resolvent analysis, and apply it to reduce the noise generated by a biconical tactical jet nozzle. Our approach identifies optimal forcing/response modes of the compressible Navier-Stokes operator, linearized about a jet mean flow, that best disrupt the coherent structures that are primarily responsible for the production of jet noise. The operating conditions of the jet and nozzle geometry are motivated by tactical Naval aircraft.

Original languageEnglish (US)
Title of host publication28th AIAA/CEAS Aeroacoustics Conference, 2022
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624106644
DOIs
StatePublished - 2022
Externally publishedYes
Event28th AIAA/CEAS Aeroacoustics Conference, 2022 - Southampton, United Kingdom
Duration: Jun 14 2022Jun 17 2022

Publication series

Name28th AIAA/CEAS Aeroacoustics Conference, 2022

Conference

Conference28th AIAA/CEAS Aeroacoustics Conference, 2022
Country/TerritoryUnited Kingdom
CitySouthampton
Period6/14/226/17/22

ASJC Scopus subject areas

  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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