Installation effects on coaxial jet noise - An experimental study

1998 ◽  
Author(s):  
A. Blackner ◽  
T. Bhat
Keyword(s):  
Experimental Study ◽  
Jet Noise ◽  
Installation Effects

High Frequency Jet Noise Installation Effects for an Under Wing Mounted Aircraft

2008 ◽  
Author(s):  
Philip Mc Laughlin ◽  
Rod Self ◽  
Christopher Powles ◽  
Christopher Wrighton ◽  
Paul Strange ◽  
...  
Keyword(s):  
High Frequency ◽  
Jet Noise ◽  
Installation Effects

Experimental Study of the Effects of Jet Noise on an Aircraft Structure

1957 ◽  
Vol 61 (554) ◽  
pp. 112-114
Author(s):  
K. W. Hetzel
Keyword(s):  
Experimental Study ◽  
Jet Noise ◽  
Aircraft Structure ◽  
Noise Effects ◽  
Noise Damage

Reports of noise effects on the rear fuselage structure of large British aircraft indicated that one might expect noise damage in this region on the Vickers Supermarine Type 544 aircraft. It will be seen from Fig. 1 that the jet efflux from each engine passes close to the fuselage side and under the tailplane. The fuselage structure proper is, however, protected from the heat and noise effects at the jet efflux by a fairing which is insulated at all attachments. This fairing, by virtue of its shape, is called the “ pen nib. ”

Turbulence Modelling and Meshing Developments for the Prediction of Jet Noise Installation Effects

2016 ◽  
Author(s):  
Charles R. Mockett ◽  
Marian Fuchs ◽  
Felix Kramer ◽  
Ulf Michel ◽  
Mathias Steger ◽  
...  
Keyword(s):  
Jet Noise ◽  
Turbulence Modelling ◽  
Installation Effects

LETTER TO THE EDITOR: AN EXPERIMENTAL STUDY OF UNDEREXPANDED SQUARE JET NOISE

1996 ◽  
Vol 197 (2) ◽  
pp. 255-261 ◽  
Author(s):  
M. Brassard ◽  
R.-H. Chen ◽  
L. Chew
Keyword(s):  
Experimental Study ◽  
Jet Noise ◽  
Letter To The Editor

Predictive LES for Jet Aeroacoustics: Current Approach and Industrial Application

2016 ◽  
Author(s):  
James Tyacke ◽  
Iftekhar Naqavi ◽  
Zhong-Nan Wang ◽  
Paul Tucker ◽  
Peer Boehning
Keyword(s):  
Numerical Methods ◽  
Jet Noise ◽  
Reynolds Numbers ◽  
Current Approach ◽  
Navier Stokes ◽  
Jet Flows ◽  
Installation Effects ◽  
Eddy Simulation ◽  
The Cost ◽  
Near Future

The major techniques for measuring jet noise have significant drawbacks, especially when including engine installation effects such as jet-flap interaction noise. Numerical methods including low order correlations and Reynolds-Averaged Navier-Stokes (RANS) are known to be deficient for complex configurations and even simple jet flows. Using high fidelity numerical methods such as Large Eddy Simulation (LES) allow conditions to be carefully controlled and quantified. LES methods are more practical and affordable than experimental campaigns. The potential to use LES methods to predict noise, identify noise risks and thus modify designs before an engine or aircraft is built is a possibility in the near future. This is particularly true for applications at lower Reynolds numbers such as jet noise of business jets and jet-flap interaction noise for under-wing engine installations. Hence, we introduce our current approaches to predicting jet noise reliably and contrast the cost of RANS-Numerical-LES (RANS-NLES) with traditional methods. Our own predictions and existing literature are used to provide a current guide, encompassing numerical aspects, meshing and acoustics processing. Other approaches are also briefly considered. We also tackle the crucial issues of how codes can be validated and verified for acoustics and how LES based methods can be introduced into industry. We consider that hybrid RANS-(N)LES is now of use to industry and contrast costs, indicating the clear advantages of eddy resolving methods.

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