MODEL FOR BROADBAND JET NOISE AMPLIFICATION.

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

A model is proposed for the change in turbulent structure of a round jet in the presence of an acoustic excitation. The excitation is assumed to trigger instability waves of a known initial amplitude at the jet exit. As these waves propagate downstream they extract energy from the mean flow and transfer it to the random turbulence. This results in an increase in the levels of the turbulence and a resulting increase in the radiated broadband noise. No calculations are presented for the noise radiation; however, an examination is made of the effect of excitation level and frequency on the jet flow.

Original languageEnglish (US)
JournalAIAA Paper
StatePublished - Jan 1 1980
EventAIAA Pap AIAA Aeroacoust Conf, 6th - Hartford, CT, USA
Duration: Jun 4 1980Jun 6 1980

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Amplification
Turbulence
Acoustics
Radiation

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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title = "MODEL FOR BROADBAND JET NOISE AMPLIFICATION.",
abstract = "A model is proposed for the change in turbulent structure of a round jet in the presence of an acoustic excitation. The excitation is assumed to trigger instability waves of a known initial amplitude at the jet exit. As these waves propagate downstream they extract energy from the mean flow and transfer it to the random turbulence. This results in an increase in the levels of the turbulence and a resulting increase in the radiated broadband noise. No calculations are presented for the noise radiation; however, an examination is made of the effect of excitation level and frequency on the jet flow.",
author = "Morris, {Philip John}",
year = "1980",
month = "1",
day = "1",
language = "English (US)",
journal = "AIAA Paper",
issn = "0146-3705",

}

MODEL FOR BROADBAND JET NOISE AMPLIFICATION. / Morris, Philip John.

In: AIAA Paper, 01.01.1980.

Research output: Contribution to journalConference article

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T1 - MODEL FOR BROADBAND JET NOISE AMPLIFICATION.

AU - Morris, Philip John

PY - 1980/1/1

Y1 - 1980/1/1

N2 - A model is proposed for the change in turbulent structure of a round jet in the presence of an acoustic excitation. The excitation is assumed to trigger instability waves of a known initial amplitude at the jet exit. As these waves propagate downstream they extract energy from the mean flow and transfer it to the random turbulence. This results in an increase in the levels of the turbulence and a resulting increase in the radiated broadband noise. No calculations are presented for the noise radiation; however, an examination is made of the effect of excitation level and frequency on the jet flow.

AB - A model is proposed for the change in turbulent structure of a round jet in the presence of an acoustic excitation. The excitation is assumed to trigger instability waves of a known initial amplitude at the jet exit. As these waves propagate downstream they extract energy from the mean flow and transfer it to the random turbulence. This results in an increase in the levels of the turbulence and a resulting increase in the radiated broadband noise. No calculations are presented for the noise radiation; however, an examination is made of the effect of excitation level and frequency on the jet flow.

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M3 - Conference article

JO - AIAA Paper

JF - AIAA Paper

SN - 0146-3705

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