Hall, J: The Role of the Large-Scale Structures inTurbulent
-
- Englisch ausgewählt
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Beschreibung
Details
Einband
Taschenbuch
Erscheinungsdatum
01.07.2009
Verlag
VDMSeitenzahl
172
Maße (L/B/H)
22/15/1 cm
Gewicht
272 g
Sprache
Englisch
ISBN
978-3-639-17570-7
The development of the large-scale turbulent
structures is experimentally investigated in both
impinging jets and three-dimensional wall jets. An
azimuthal decomposition of the fluctuating wall
pressure in the impinging jet revealed the presence
of large-scale ring structures; however, these ring
structures did not appear to impact the wall
concentrically. The
development
of three-dimensional wall jets exiting rectangular
channels with aspect-ratios from 1 to 8 was
investigated using the turbulent velocity and
measurements of the fluctuating wall pressure. The
development was found to be delayed by increasing the
channel aspect-ratio, but the length-scales in the
different jets could be collapsed by scaling the
streamwise coordinate by the square root of the
channel cross-sectional area and normalizing by the
size of the channel. Pressure-velocity correlations
indicate that the large-scale structures in these
flows are strongly asymmetric.
structures is experimentally investigated in both
impinging jets and three-dimensional wall jets. An
azimuthal decomposition of the fluctuating wall
pressure in the impinging jet revealed the presence
of large-scale ring structures; however, these ring
structures did not appear to impact the wall
concentrically. The
development
of three-dimensional wall jets exiting rectangular
channels with aspect-ratios from 1 to 8 was
investigated using the turbulent velocity and
measurements of the fluctuating wall pressure. The
development was found to be delayed by increasing the
channel aspect-ratio, but the length-scales in the
different jets could be collapsed by scaling the
streamwise coordinate by the square root of the
channel cross-sectional area and normalizing by the
size of the channel. Pressure-velocity correlations
indicate that the large-scale structures in these
flows are strongly asymmetric.
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