Numerical predictions of high speed jet noise

Philip J. Morris, Qunzhen Wang, Lyle N. Long, David P. Lockard

Research output: Contribution to conferencePaper

8 Citations (Scopus)

Abstract

A parallel three-dimensional computational aeroacoustics method, based on large eddy simulation and a split between the mean flow and perturbations, has been developed to predict the unsteady characteristics of supersonic jet flows and their radiated noise. The instantaneous quantities are decomposed into a time-independent mean component, a large-scale perturbation, and a small-scale perturbation. Only the large-scale fluctuations are resolved directly while the mean quantities are obtained from a traditional Reynolds averaged method. The effects of the small-scale fluctuations are parameterized using a subgrid scale model. In order to reduce the wall-clock time for the simulations, the three-dimensional code has been parallelized using a domain decomposition strategy and Message Passing Interface (MPI) routines are used to facilitate exchange of data between different processors. Results for both the flow and acoustic fields of a circular jet simulation at a nozzle exit Mach number of 2.1 are presented and comparisons with several experimental measurements are made.

Original languageEnglish (US)
DOIs
StatePublished - Jan 1 1997
Event3rd AIAA/CEAS Aeroacoustics Conference, 1997 - Atlanta, United States
Duration: May 12 1997May 14 1997

Other

Other3rd AIAA/CEAS Aeroacoustics Conference, 1997
CountryUnited States
CityAtlanta
Period5/12/975/14/97

Fingerprint

Acoustic noise
Computational aeroacoustics
Message passing
Acoustic fields
Large eddy simulation
Mach number
Clocks
Nozzles
Flow fields
Decomposition

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Aerospace Engineering

Cite this

Morris, P. J., Wang, Q., Long, L. N., & Lockard, D. P. (1997). Numerical predictions of high speed jet noise. Paper presented at 3rd AIAA/CEAS Aeroacoustics Conference, 1997, Atlanta, United States. https://doi.org/10.2514/6.1997-1598
Morris, Philip J. ; Wang, Qunzhen ; Long, Lyle N. ; Lockard, David P. / Numerical predictions of high speed jet noise. Paper presented at 3rd AIAA/CEAS Aeroacoustics Conference, 1997, Atlanta, United States.
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Morris, PJ, Wang, Q, Long, LN & Lockard, DP 1997, 'Numerical predictions of high speed jet noise', Paper presented at 3rd AIAA/CEAS Aeroacoustics Conference, 1997, Atlanta, United States, 5/12/97 - 5/14/97. https://doi.org/10.2514/6.1997-1598

Numerical predictions of high speed jet noise. / Morris, Philip J.; Wang, Qunzhen; Long, Lyle N.; Lockard, David P.

1997. Paper presented at 3rd AIAA/CEAS Aeroacoustics Conference, 1997, Atlanta, United States.

Research output: Contribution to conferencePaper

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N2 - A parallel three-dimensional computational aeroacoustics method, based on large eddy simulation and a split between the mean flow and perturbations, has been developed to predict the unsteady characteristics of supersonic jet flows and their radiated noise. The instantaneous quantities are decomposed into a time-independent mean component, a large-scale perturbation, and a small-scale perturbation. Only the large-scale fluctuations are resolved directly while the mean quantities are obtained from a traditional Reynolds averaged method. The effects of the small-scale fluctuations are parameterized using a subgrid scale model. In order to reduce the wall-clock time for the simulations, the three-dimensional code has been parallelized using a domain decomposition strategy and Message Passing Interface (MPI) routines are used to facilitate exchange of data between different processors. Results for both the flow and acoustic fields of a circular jet simulation at a nozzle exit Mach number of 2.1 are presented and comparisons with several experimental measurements are made.

AB - A parallel three-dimensional computational aeroacoustics method, based on large eddy simulation and a split between the mean flow and perturbations, has been developed to predict the unsteady characteristics of supersonic jet flows and their radiated noise. The instantaneous quantities are decomposed into a time-independent mean component, a large-scale perturbation, and a small-scale perturbation. Only the large-scale fluctuations are resolved directly while the mean quantities are obtained from a traditional Reynolds averaged method. The effects of the small-scale fluctuations are parameterized using a subgrid scale model. In order to reduce the wall-clock time for the simulations, the three-dimensional code has been parallelized using a domain decomposition strategy and Message Passing Interface (MPI) routines are used to facilitate exchange of data between different processors. Results for both the flow and acoustic fields of a circular jet simulation at a nozzle exit Mach number of 2.1 are presented and comparisons with several experimental measurements are made.

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Morris PJ, Wang Q, Long LN, Lockard DP. Numerical predictions of high speed jet noise. 1997. Paper presented at 3rd AIAA/CEAS Aeroacoustics Conference, 1997, Atlanta, United States. https://doi.org/10.2514/6.1997-1598