Acoustic source analysis of a supersonic rectangular chevron jet

Jordan Kreitzman, Joseph W. Nichols

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

4 Scopus citations

Abstract

Acoustic source terms from high-fidelity simulated data of a rectangular supersonic jet with chevrons are found from Goldstein's generalized acoustic analogy. A statistical description of the flow field is established in detail including an in-depth look at first, second, and fourth order statistics. Fourth order correlation statistics are fit to previously used acoustic source models. Specifically, this paper performs a detailed analysis of four different models: the Gaussian model, moving-frame model, fixed-frame model, and modified-distance model. These models were previously used to describe correlation data from axisymmetric jets. In this paper, we assess the accuracy of these models in the con- text of highly complex nozzle shapes. The latter three models are found to be similar in accuracy, while the Gaussian model is found to be a poorer fit. This paper also investigates the theoretical underpinning of reduced-order acoustic source models by testing the assumptions of quasi-normality and statistical axisymmetry. It is found that the flow field is not quasi-normal in the axial direction but is however quasi-normal in the transverse directions. Our analysis also shows that the flow is locally statistically axisymmetric close to the edges of the flow field but not near the center.

Original languageEnglish (US)
Title of host publication21st AIAA/CEAS Aeroacoustics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103674
DOIs
StatePublished - 2015
Event21st AIAA/CEAS Aeroacoustics Conference, 2015 - Dallas, United States
Duration: Jun 22 2015Jun 26 2015

Publication series

Name21st AIAA/CEAS Aeroacoustics Conference

Other

Other21st AIAA/CEAS Aeroacoustics Conference, 2015
CountryUnited States
CityDallas
Period6/22/156/26/15

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