An experimental study of the wall-pressure field associated with a turbulent spot in a laminar boundary layer

1982 ◽  
Vol 118 (-1) ◽  
pp. 59 ◽  
Author(s):  
T. S. Mautner ◽  
C. W. Van Atta
Keyword(s):  
Boundary Layer ◽  
Experimental Study ◽  
Laminar Boundary Layer ◽  
Pressure Field ◽  
Wall Pressure ◽  
Turbulent Spot

Wavelet Analysis of Space-Varying Intermittent Wall Pressure Field of Transitional Boundary Layer

2003 ◽  
Author(s):  
Stephen R. Snarski
Keyword(s):  
Boundary Layer ◽  
Wavelet Transforms ◽  
Pulse Train ◽  
Pressure Field ◽  
Wall Pressure ◽  
Turbulent Spot ◽  
Spectral Content ◽  
Pulse Trains ◽  
Fundamental Pulse ◽  
The Mean

Measurements of the space-time fluctuating wall pressure field across the transition region of a flat plate zero pressure gradient boundary layer have been performed in an anechoic wind tunnel with a 64-element linear array of sub-miniature hearing-aid microphones (d+ = 15). Wavelet transforms are being used to quantify the structure and nonhomogeneous wavenumber-frequency spectral content of the field. The results illustrate that the fluctuations within the turbulent spots scale with those which exists in a fully developed turbulent boundary layer consistent with previous findings. The spectral contributions due to a second much larger length/time scale associated with the mean spacing between spots (e.g., turbulent spot wavepacket pulse trains) is under investigation. Based on an analysis of sinusoidal pulse train signals and consideration of the well established bursting frequency in turbulent boundary layers, it is conjectured here that the turbulent spot wavepacket pulse trains should produce a statistical distribution of energy about the mean fundamental pulse train frequency.

Decay of fluctuating wall-pressure field of Mach 5 turbulent boundary layer

AIAA Journal ◽  
1999 ◽  
Vol 37 ◽  
pp. 1088-1096
Author(s):  
O. H. Unalmis ◽  
D. S. Dolling
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Pressure Field ◽  
Wall Pressure

A similarity transformation for a turbulent spot in a laminar boundary layer

1980 ◽  
Vol 23 (12) ◽  
pp. 2561 ◽  
Author(s):  
M. Sokolov ◽  
R. A. Antonia ◽  
A. J. Chambers
Keyword(s):  
Boundary Layer ◽  
Laminar Boundary Layer ◽  
Similarity Transformation ◽  
Turbulent Spot
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