Large-Eddy Simulations of a Supersonic Jet and Its Near-Field Acoustic Properties

AIAA Journal ◽  
2009 ◽  
Vol 47 (8) ◽  
pp. 1849-1865 ◽  
Author(s):  
Junhui Liu ◽  
K. Kailasanath ◽  
Ravi Ramamurti ◽  
David Munday ◽  
Ephraim Gutmark ◽  
...  
Keyword(s):  
Near Field ◽  
Supersonic Jet ◽  
Large Eddy Simulations ◽  
Acoustic Properties ◽  
Large Eddy

Large Eddy Simulations of Supersonic Jet Flows for Aeroacoustic Applications

2015 ◽  
Author(s):  
Carlos Junqueira-Junior ◽  
Sami Yamouni ◽  
Joao Luiz F. Azevedo ◽  
William Wolf
Keyword(s):  
Supersonic Jet ◽  
Large Eddy Simulations ◽  
Jet Flows ◽  
Large Eddy

Large Eddy Simulations of the Flow in the Near-Field Region of a Turbulent Buoyant Helium Plume

2012 ◽  
Vol 90 (3) ◽  
pp. 511-543 ◽  
Author(s):  
G. Maragkos ◽  
P. Rauwoens ◽  
Y. Wang ◽  
B. Merci
Keyword(s):  
Near Field ◽  
Large Eddy Simulations ◽  
Field Region ◽  
Large Eddy ◽  
Helium Plume

Supersonic Jet Noise Reduction Technologies for Gas Turbine Engines

2011 ◽  
Vol 133 (10) ◽  
Author(s):  
David Munday ◽  
Nick Heeb ◽  
Ephraim Gutmark ◽  
Junhui Liu ◽  
K. Kailasanath
Keyword(s):  
Flow Field ◽  
Near Field ◽  
Supersonic Jet ◽  
Acoustic Emissions ◽  
Nozzle Geometry ◽  
Axial Position ◽  
Eddy Simulation ◽  
Image Velocimetry ◽  
Large Eddy ◽  
The Impact

This paper presents observations and simulations of the impact of several technologies on modifying the flow-field and acoustic emissions from supersonic jets from nozzles typical of those used on military aircraft. The flow-field is measured experimentally by shadowgraph and particle image velocimetry. The acoustics are characterized by near- and far-field microphone measurements. The flow- and near-field pressures are simulated by a monotonically integrated large eddy simulation. Use of unstructured grids allows accurate modeling of the nozzle geometry. The emphasis of the work is on “off-design” or nonideally expanded flow conditions. The technologies applied to these nozzles include chevrons, fluidic injection, and fluidically enhanced chevrons. The fluidic injection geometry and the fluidic enhancement geometry follow the approach found successful for subsonic jets by employing jets pitched 60 deg into the flow, impinging on the shear layer just past the tips of the chevrons or in the same axial position when injection is without chevrons.

Large-Eddy-Simulations of over-expanded supersonic jet noise for launcher applications

2011 ◽  
Vol 130 (4) ◽  
pp. 2511-2511 ◽  
Author(s):  
Jean-Baptiste Dargaud ◽  
Julien Troyes ◽  
François Vuillot
Keyword(s):  
Supersonic Jet ◽  
Jet Noise ◽  
Large Eddy Simulations ◽  
Supersonic Jet Noise ◽  
Large Eddy

Supersonic Jet Noise Reduction Using Fluidics, Mechanical Chevrons and Fluidically Enhanced Chevrons

2010 ◽  
Author(s):  
David Munday ◽  
Nick Heeb ◽  
Ephraim Gutmark ◽  
Junhui Liu ◽  
K. Kailasanath
Keyword(s):  
Near Field ◽  
Supersonic Jet ◽  
Acoustic Emissions ◽  
Nozzle Geometry ◽  
Axial Position ◽  
Eddy Simulation ◽  
Image Velocimetry ◽  
Large Eddy ◽  
Nozzle Geometries ◽  
The Impact

This paper presents observations and simulations of the impact of several technologies on modifying the flow field and acoustic emissions from supersonic jets from nozzles typical of those used on military aircraft. The flowfield is measured experimentally by shadowgraph and particle image velocimetry (PIV). The acoustics are characterized by near and far-field microphone measurements. The flow and near-field pressures are simulated by monotonically integrated large-eddy simulation (MILES). Use of unstructured grids allows accurate modeling of the nozzle geometry. The nozzle geometries used in this research are representative of practical engine nozzles. The emphasis of the work is on “off-design” or non-ideally expanded flow conditions. The technologies applied to these nozzles include chevrons, fluidic injection and fluidically enhanced chevrons. The fluidic injection geometry and fluidic enhancement geometry follow the approach found successful for subsonic jets by Alkislar, Krothapalli & Butler [1] employing jets pitched 60° into the flow, impinging on the shear layer just past the tips of the chevrons, or in the same axial position when injection is without chevrons.

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