scholarly journals Volume reconstruction of a plane jet impinging on a slotted plate using the phase averaging technique

2017 ◽  
Vol 139 ◽  
pp. 404-409 ◽  
Author(s):  
J. Hamdi ◽  
H.H. Assoum ◽  
K. Abed-Meraïm ◽  
A. Sakout
Keyword(s):  
Volume Reconstruction ◽  
Averaging Technique ◽  
Phase Averaging ◽  
Slotted Plate ◽  
Plane Jet

A Frequency-Domain Filtering Technique for Triple Decomposition of Unsteady Turbulent Flow

1992 ◽  
Vol 114 (1) ◽  
pp. 45-51 ◽  
Author(s):  
G. J. Brereton ◽  
A. Kodal
Keyword(s):  
Time Series ◽  
Turbulent Flow ◽  
Frequency Domain ◽  
Measurement Data ◽  
Averaging Technique ◽  
Phase Averaging ◽  
Spectral Estimates ◽  
Improved Performance ◽  
A New Technique ◽  
Flow Variables

A new technique is presented for decomposing unsteady turbulent flow variables into their organized unsteady and turbulent components, which appears to offer some significant advantages over existing ones. The technique uses power-spectral estimates of data to deduce the optimal frequency-domain filter for determining the organized and turbulent components of a time series of data. When contrasted with the phase-averaging technique, this method can be thought of as replacing the assumption that the organized motion is identically reproduced in successive cycles of known periodicity by a more general condition: the cross-correlation of the organized and turbulent components is minimized for a time series of measurement data, given the expected shape of the turbulence power spectrum. The method is significantly more general than the phase average in its applicability and makes more efficient use of available data. Performance evaluations for time series of unsteady turbulent velocity measurements attest to the accuracy of the technique and illustrate the improved performance of this method over the phase-averaging technique when cycle-to-cycle variations in organized motion are present.

Phase Averaging Analysis of the Unsteady Velocity Profiles in a Separated Flow

2003 ◽  
Author(s):  
Masaki Yamagishi ◽  
Tomoko Togano ◽  
Shinichi Tashiro
Keyword(s):  
Phase Angle ◽  
Wavelet Transformation ◽  
Separated Flow ◽  
Time Dependent ◽  
Frequency Data ◽  
Two Phase ◽  
Averaging Technique ◽  
Phase Averaging ◽  
Dependent Signal ◽  
Averaging Techniques

By using phase averaging technique, turbulent structure in a flow was studied. For the phase angle of the time dependent signal modulated in frequency, data acquisition is difficult. This study proposed a new method of phase averaging by wavelet transformation. The purpose of the present study is to compare the results of the phase averaging by wavelet transformation with those by the traditional phase averaging technique. These two phase averaging techniques were applied to the experimental data of the velocities in a separated flow with periodical fluctuation. Between the results by these techniques, noticeable differences were shown. If the velocity signals include the frequency modulation, the profiles of phase-averaged velocity by the traditional technique will have nearly the same shapes and be similar to those of time-averaged velocity. On the other hand, the profiles by wavelet transformation showed the clear differences at each phase angle even for the velocity signals with modulated frequencies.

The vortex dynamics and the self sustained tones in a plane jet impinging on a slotted plate

2014 ◽  
Vol 48 ◽  
pp. 231-235 ◽  
Author(s):  
Hassan H. Assoum ◽  
Mouhammad El Hassan ◽  
Kamel Abed-Meraim ◽  
Anas Sakout
Keyword(s):  
Vortex Dynamics ◽  
The Self ◽  
Slotted Plate ◽  
Plane Jet

scholarly journals Flow Dynamics of a Plane Jet Impinging on a Slotted Plate: Large Eddy Simulation

2017 ◽  
Vol 10 (4) ◽  
pp. 1211-1222
Author(s):  
N. Kharoua ◽  
L. khezzar ◽  
M. Alshehhi ◽  
◽  
◽  
...  
Keyword(s):  
Large Eddy Simulation ◽  
Flow Dynamics ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Slotted Plate ◽  
Plane Jet

A New Averaging Technique for Multiphase, Turbulent, Reacting

1998 ◽  
Vol 25 (1-3) ◽  
pp. 135-143
Author(s):  
Y. G. Zhao ◽  
S. H. Chan ◽  
M. M. M. Abou-Ellail
Keyword(s):  
Averaging Technique

Large eddy simulation of evolution of a passive scalar in plane jet

AIAA Journal ◽  
2001 ◽  
Vol 39 ◽  
pp. 1509-1516 ◽  
Author(s):  
C. Le Ribault ◽  
S. Sarkar ◽  
S. A. Stanley
Keyword(s):  
Large Eddy Simulation ◽  
Passive Scalar ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Plane Jet
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