6 Citations (Scopus)

Abstract

Numerical simulations are presented for the unsteady flow and noise radiation of high speed circular jets. The predictions are based on solutions of the nonlinear disturbance equations. Only the large-scale fluctuations are resolved. The effects of the small scales are parameterized using a subgrid-scale model. The radiated noise is predicted using both a direct simulation and a Ffowcs Williams-Hawkings method. Comparisons are made with experimental measurements. Previously reported overpredictions are considerably reduced. The improvements due to changes in the prescription of inflow conditions and the addition of a dynamic subgrid-scale model are discussed. Preliminary results are presented for a subsonic heated operating condition.

Original languageEnglish (US)
StatePublished - Dec 1 2000
Event6th Aeroacoustics Conference and Exhibit, 2000 - Lahaina, HI, United States
Duration: Jun 12 2000Jun 14 2000

Other

Other6th Aeroacoustics Conference and Exhibit, 2000
CountryUnited States
CityLahaina, HI
Period6/12/006/14/00

Fingerprint

jet aircraft noise
scale models
nozzles
Nozzles
electromagnetic noise
unsteady flow
Unsteady flow
dynamic models
disturbances
simulation
high speed
Radiation
Computer simulation
predictions

All Science Journal Classification (ASJC) codes

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

Cite this

Morris, P. J., Scheidegger, T. E., & Long, L. N. (2000). Jet noise simulations for circular nozzles. Paper presented at 6th Aeroacoustics Conference and Exhibit, 2000, Lahaina, HI, United States.
Morris, Philip John ; Scheidegger, Thomas E. ; Long, Lyle Norman. / Jet noise simulations for circular nozzles. Paper presented at 6th Aeroacoustics Conference and Exhibit, 2000, Lahaina, HI, United States.
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Morris, PJ, Scheidegger, TE & Long, LN 2000, 'Jet noise simulations for circular nozzles' Paper presented at 6th Aeroacoustics Conference and Exhibit, 2000, Lahaina, HI, United States, 6/12/00 - 6/14/00, .

Jet noise simulations for circular nozzles. / Morris, Philip John; Scheidegger, Thomas E.; Long, Lyle Norman.

2000. Paper presented at 6th Aeroacoustics Conference and Exhibit, 2000, Lahaina, HI, United States.

Research output: Contribution to conferencePaper

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T1 - Jet noise simulations for circular nozzles

AU - Morris, Philip John

AU - Scheidegger, Thomas E.

AU - Long, Lyle Norman

PY - 2000/12/1

Y1 - 2000/12/1

N2 - Numerical simulations are presented for the unsteady flow and noise radiation of high speed circular jets. The predictions are based on solutions of the nonlinear disturbance equations. Only the large-scale fluctuations are resolved. The effects of the small scales are parameterized using a subgrid-scale model. The radiated noise is predicted using both a direct simulation and a Ffowcs Williams-Hawkings method. Comparisons are made with experimental measurements. Previously reported overpredictions are considerably reduced. The improvements due to changes in the prescription of inflow conditions and the addition of a dynamic subgrid-scale model are discussed. Preliminary results are presented for a subsonic heated operating condition.

AB - Numerical simulations are presented for the unsteady flow and noise radiation of high speed circular jets. The predictions are based on solutions of the nonlinear disturbance equations. Only the large-scale fluctuations are resolved. The effects of the small scales are parameterized using a subgrid-scale model. The radiated noise is predicted using both a direct simulation and a Ffowcs Williams-Hawkings method. Comparisons are made with experimental measurements. Previously reported overpredictions are considerably reduced. The improvements due to changes in the prescription of inflow conditions and the addition of a dynamic subgrid-scale model are discussed. Preliminary results are presented for a subsonic heated operating condition.

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Morris PJ, Scheidegger TE, Long LN. Jet noise simulations for circular nozzles. 2000. Paper presented at 6th Aeroacoustics Conference and Exhibit, 2000, Lahaina, HI, United States.