Imperial College London
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DrGeorgiosRigas

Faculty of Engineering, Department of Aeronautics

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 5065g.rigas CV

 
 
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Location

 

327City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Rigas:2017:10.2514/6.2017-4046,
author = {Rigas, G and Schmidt, OT and Colonius, T and Brès, GA},
doi = {10.2514/6.2017-4046},
title = {One-way Navier-stokes and resolvent analysis for modeling coherent structures in a supersonic turbulent jet},
url = {http://dx.doi.org/10.2514/6.2017-4046},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - A linear analysis of the mean flow of a turbulent Mach 1.5 high Reynolds number jet is conducted. Optimal response modes describing the fluctuating hydrodynamic and acoustic fields are obtained in a computationally efficient way by spatially marching the linearized One-Way Navier-Stokes equations. For this purpose, an adjoint-based optimization framework is proposed and demonstrated for calculating optimal boundary conditions and optimal volumetric forcing. These optimal modes are validated against modes obtained in terms of global resolvent analysis. Two scenarios are considered in the present analysis. In the first case, no restrictions are applied to the spatial forcing distribution. In the second scenario, the forcing is restricted to the nozzle plane. The resulting optimal and suboptimal modes are compared to spectral proper orthogonal modes obtained from a high-fidelity large eddy simulation. 1 The implications of these observations are discussed in detail.
AU  - Rigas,G
AU  - Schmidt,OT
AU  - Colonius,T
AU  - Brès,GA
DO  - 10.2514/6.2017-4046
PY  - 2017///
TI  - One-way Navier-stokes and resolvent analysis for modeling coherent structures in a supersonic turbulent jet
UR  - http://dx.doi.org/10.2514/6.2017-4046
ER  -
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