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Large Eddy Simulation of Highly Compressible Jets with Tripped Boundary Layers

Gojon, Romain and Bogey, Christophe and Mihaescu, Mihai Large Eddy Simulation of Highly Compressible Jets with Tripped Boundary Layers. (2019) In: Direct and Large-Eddy Simulation XI. (ERCOFTAC Series). Springer, 333-339. ISBN 978-3-030-04914-0

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Official URL: https://doi.org/10.1007/978-3-030-04915-7_44

Abstract

In high-speed aircraft, supersonic jets used for propulsion can lead to very intense aerodynamically generated acoustic noise. Thus, there is a need to study the aerodynamic and aeroacoustic properties of highly compressible jets. In previous studies, several simulations of supersonic jets have been conducted. Unfortunately, the turbulence intensity at the nozzle exit was dependent on the internal geometry of the nozzle and could not be tuned. This is a pity given that, as shown experimentally and numerically for subsonic and supersonic jets, the boundary layer state of the jet affects the jet flow and noise. In this study, a boundary-layer tripping method permitting to obtain an initially turbulent supersonic jet is studied. The influence of the tripped jet boundary layers on the flow and acoustic fields of the jet is analyzed. The impact of nozzle-exit turbulence levels on the noise radiation and notably on the acoustic components specific to supersonic jets (screech noise, broadband shock-associated noise, mixing noise and Mach wave radiation) is discussed.

Item Type:Book Section
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Royal Institute of Technology – KTH (SWEDEN)
Other partners > Institut National des Sciences Appliquées - INSA (FRANCE)
Other partners > Université de Lyon - UDL (FRANCE)
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Deposited On:19 Apr 2021 17:55

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