scholarly journals Real-time supersonic jet noise predictions from near-field sensors with a wavepacket model

2021 ◽  
Vol 150 (6) ◽  
pp. 4297-4307
Author(s):  
Vitor G. Kleine ◽  
Kenzo Sasaki ◽  
André V. G. Cavalieri ◽  
Guillaume A. Brès ◽  
Tim Colonius
Keyword(s):  
Real Time ◽  
Near Field ◽  
Supersonic Jet ◽  
Jet Noise ◽  
Supersonic Jet Noise

Energy transfer mechanism of supersonic jet noise through rectangular nozzles

2017 ◽  
Vol 65 (2) ◽  
pp. 110-120 ◽  
Author(s):  
Zhe Chen ◽  
Jiu-Hui Wu ◽  
A-Dan Ren ◽  
Xin Chen ◽  
Zhen Huang
Keyword(s):  
Energy Transfer ◽  
Supersonic Jet ◽  
Jet Noise ◽  
Transfer Mechanism ◽  
Energy Transfer Mechanism ◽  
Supersonic Jet Noise

A proposed wavy shield for suppression of supersonic jet noise utilizing reflections

2021 ◽  
Vol 20 (1-2) ◽  
pp. 4-34
Author(s):  
Reda R Mankbadi ◽  
Saman Salehian
Keyword(s):  
Large Scale ◽  
Flat Surface ◽  
Near Field ◽  
Supersonic Jet ◽  
Jet Noise ◽  
Dominant Frequency ◽  
Wavy Surface ◽  
Initial Region ◽  
Reflected Waves ◽  
Free Jet

In this work we propose replacing the conventional flat-surface airframe that shields the engine by a wavy surface. The basic principle is to design a wavy pattern to reflect the incoming near-field flow and acoustic perturbations into waves of a particular dominant frequency. The reflected waves will then excite the corresponding frequency of the large-scale structure in the initial region of the jet’s shear layer. By designing the frequency of the reflected waves to be the harmonic of the fundamental frequency that corresponds to the radiated peak noise, the two frequency-modes interact nonlinearly. With the appropriate phase difference, the harmonic dampens the fundamental as it extracts energy from it to amplify. The outcome is a reduction in the peak noise. To evaluate this concept, we conducted Detached Eddy Simulations for a rectangular supersonic jet with and without the wavy shield and verified our numerical results with experimental data for a free jet, as well as, for a jet with an adjacent flat surface. Results show that the proposed wavy surface reduces the jet noise as compared to that of the corresponding flat surface by as much as 4 dB.

Application of Synthetic Array Techniques for Improved Simulations of Hot Supersonic Jet Noise

2015 ◽  
Author(s):  
Chris Nelson ◽  
Alan B. Cain ◽  
Robert P. Dougherty ◽  
Kenneth S. Brentner ◽  
Philip J. Morris
Keyword(s):  
Supersonic Jet ◽  
Jet Noise ◽  
Supersonic Jet Noise

Effect of Axial Location of Micro Vortex Generators on Supersonic Jet Noise Reduction

2022 ◽  
Author(s):  
Junhui Liu ◽  
Yu Yu Khine ◽  
Mohammad Saleem ◽  
Omar Lopez Rodriguez ◽  
Ephraim J. Gutmark
Keyword(s):  
Noise Reduction ◽  
Supersonic Jet ◽  
Jet Noise ◽  
Vortex Generators ◽  
Supersonic Jet Noise ◽  
Axial Location

Supersonic Jet Noise Reduction Using Micro Vortex Generators

2021 ◽  
Author(s):  
Junhui Liu ◽  
Yu Yu Khine ◽  
Mohammad Saleem ◽  
Omar Lopez Rodriguez ◽  
Ephraim Gutmark
Keyword(s):  
Noise Reduction ◽  
Supersonic Jet ◽  
Jet Noise ◽  
Vortex Generators ◽  
Supersonic Jet Noise

Efficient Supersonic Jet Noise Simulations Using JENRE

2014 ◽  
Author(s):  
Kailas Kailasanath ◽  
Andrew T. Corrigan ◽  
Junhui Liu ◽  
Ravi Ramamurti
Keyword(s):  
Supersonic Jet ◽  
Jet Noise ◽  
Supersonic Jet Noise

Partial-field decomposition analysis of full-scale supersonic jet noise using optimized-location virtual references

2018 ◽  
Vol 144 (3) ◽  
pp. 1356-1367 ◽  
Author(s):  
Alan T. Wall ◽  
Kent L. Gee ◽  
Kevin M. Leete ◽  
Tracianne B. Neilsen ◽  
Trevor A. Stout ◽  
...  
Keyword(s):  
Supersonic Jet ◽  
Decomposition Analysis ◽  
Jet Noise ◽  
Full Scale ◽  
Supersonic Jet Noise

Enhanced Supersonic Jet Noise Reduction using Two Array Configurations of Micro Vortex Generators

2022 ◽  
Author(s):  
Mohammad Saleem ◽  
Omar Lopez Rodriguez ◽  
Ephraim J. Gutmark ◽  
Junhui Liu ◽  
Yu Yu Khine
Keyword(s):  
Noise Reduction ◽  
Supersonic Jet ◽  
Jet Noise ◽  
Vortex Generators ◽  
Supersonic Jet Noise
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