Large Eddy Simulation for Fan-OGV Broadband Noise Prediction

2008 ◽  
Author(s):  
Qinling Li ◽  
Nigel Peake ◽  
Mark Savill
Keyword(s):  
Large Eddy Simulation ◽  
Broadband Noise ◽  
Noise Prediction ◽  
Eddy Simulation ◽  
Large Eddy

Airfoil Trailing-Edge Blowing: Broadband Noise Prediction from Large-Eddy Simulation

AIAA Journal ◽  
2012 ◽  
Vol 50 (2) ◽  
pp. 294-303 ◽  
Author(s):  
Julian Winkler ◽  
Stéphane Moreau ◽  
Thomas Carolus
Keyword(s):  
Large Eddy Simulation ◽  
Broadband Noise ◽  
Noise Prediction ◽  
Trailing Edge ◽  
Eddy Simulation ◽  
Large Eddy

Broadband noise prediction using large eddy simulation and a frequency domain method

2017 ◽  
Vol 117 ◽  
pp. 94-105 ◽  
Author(s):  
Fan Tong ◽  
Wei-Yang Qiao ◽  
Wei-Jie Chen ◽  
Liang-Feng Wang ◽  
Xun-Nian Wang
Keyword(s):  
Large Eddy Simulation ◽  
Frequency Domain ◽  
Broadband Noise ◽  
Frequency Domain Method ◽  
Noise Prediction ◽  
Eddy Simulation ◽  
Domain Method ◽  
Large Eddy

Wake-Airfoil Interaction as Broadband Noise Source: A Large-Eddy Simulation Study

2005 ◽  
Vol 4 (1-2) ◽  
pp. 93-115 ◽  
Author(s):  
Jérôme Boudet ◽  
Nathalie Grosjean ◽  
Marc C. Jacob
Keyword(s):  
Large Eddy Simulation ◽  
Particle Image ◽  
Broadband Noise ◽  
Far Field ◽  
Acoustic Analogy ◽  
Eddy Simulation ◽  
Naca0012 Airfoil ◽  
Image Velocimetry ◽  
Large Eddy ◽  
Proper Orthogonal

A large-eddy simulation is carried out on a rod-airfoil configuration and compared to an accompanying experiment as well as to a RANS computation. A NACA0012 airfoil (chord c = 0.1 m) is located one chord downstream of a circular rod (diameter d = c/10, Red = 48 000). The computed interaction of the resulting sub-critical vortex street with the airfoil is assessed using averaged quantities, aerodynamic spectra and proper orthogonal decomposition (POD) of the instantaneous flow fields. Snapshots of the flow field are compared to particle image velocimetry (PIV) data. The acoustic far field is predicted using the Ffowcs Williams & Hawkings acoustic analogy, and compared to the experimental far field spectra. The large-eddy simulation is shown to accurately represent the deterministic pattern of the vortex shedding that is described by POD modes 1 & 2 and the resulting tonal noise also compares favourably to measurements. Furthermore higher order POD modes that are found in the PIV data are well predicted by the computation. The broadband content of the aerodynamic and the acoustic fields is consequently well predicted over a large range of frequencies ([0 kHz; 10 kHz]).

Wall-Resolved Large Eddy Simulation of a Realistic Turbofan Rotor for Noise Prediction

2021 ◽  
Author(s):  
Pavel Kholodov ◽  
Regis Koch ◽  
Marlène Sanjosé ◽  
Stephane Moreau
Keyword(s):  
Large Eddy Simulation ◽  
Noise Prediction ◽  
Eddy Simulation ◽  
Large Eddy

Simulations of rocket launch noise suppression with water injection from impingement pad

2020 ◽  
Vol 19 (3-5) ◽  
pp. 207-239
Author(s):  
Saman Salehian ◽  
Reda R Mankbadi
Keyword(s):  
Large Eddy Simulation ◽  
Fluid Model ◽  
Water Injection ◽  
Broadband Noise ◽  
Computational Domain ◽  
Two Phase ◽  
Effect Of Water ◽  
Eddy Simulation ◽  
Impingement Plate ◽  
Large Eddy

The focus of this work is on understanding the effect of water injection from the launch pad on the noise generated during rocket’s lift-off. To simplify the problem, we consider a supersonic jet impinging on a flat plate with water injection from the impingement plate. The Volume of Fluid model is adopted in this work to simulate the two-phase flow. A Hybrid Large Eddy Simulation – Unsteady Reynolds Averaged Simulation approach is employed to model turbulence, wherein Unsteady Reynolds Averaged Simulation is used near the walls, and Large Eddy Simulation is used elsewhere in the computational domain. The numerical issues associated with simulating the noise of two-phase supersonic flow are addressed. The pressure fluctuations on the impingement plate obtained from numerical simulations agree well with the experimental data. Furthermore, the predicted effect of water injection on the far-field broadband noise is consistent with that of the experiment. The possible mechanisms for noise reduction by water injection are discussed.

Noise prediction via large eddy simulation: Application to radial fans

2009 ◽  
Vol 57 (3) ◽  
pp. 169 ◽  
Author(s):  
Esra Sorguven ◽  
Yilmaz Dogan ◽  
Faruk Bayraktar ◽  
Kenan Y. Sanliturk
Keyword(s):  
Large Eddy Simulation ◽  
Noise Prediction ◽  
Eddy Simulation ◽  
Large Eddy

Jet noise prediction via coupling large eddy simulation and stochastic modeling

2017 ◽  
Vol 142 (4) ◽  
pp. 2491-2491
Author(s):  
Joshua D. Blake ◽  
VASILEIOS SASSANIS ◽  
David Thompson ◽  
Adrian Sescu ◽  
Yuji Hattori
Keyword(s):  
Large Eddy Simulation ◽  
Stochastic Modeling ◽  
Jet Noise ◽  
Noise Prediction ◽  
Eddy Simulation ◽  
Large Eddy
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