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Large eddy simulations of a dual-stream jet with shockcells and noise emission analysis

Pérez Arroyo, Carlos. Large eddy simulations of a dual-stream jet with shockcells and noise emission analysis. PhD, Dynamique des fluides, Institut National Polytechnique de Toulouse, 2016

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Abstract

This thesis deals with the shock-cell noise generated by under-expanded supersonic jets in single- and dualstream configurations. Shock-cell noise is generated by the interaction between the turbulent structures of the shear-layer and the shock-cell system developed in the potential core of the jet. In order to study shock-cell noise, large eddy simulations adapted to aeroacoustics are carried out using high-order compact schemes that allow for a non-dissipative nondispersive approach. The results are analyzed and compared to experimental results. In particular, an acoustic-hydrodynamic filtering is carried out in the near field in order to analyze the acoustic and hydrodynamic azimuthal modes. Moreover, a wavelet-based analysis is implemented in order to identify the relevant acoustic and hydrodynamic features of the supersonic jets.

Item Type:PhD Thesis
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Laboratory name:
Research Director:
Airiau, Christophe and Puigt, Guillaume
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Deposited On:05 Dec 2016 08:05

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