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The Role of the Large-scale Structures in Turbulent Wall Jets
Joseph Hall
The Role of the Large-scale Structures in Turbulent Wall Jets
Joseph Hall
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.
Media | Książki Paperback Book (Książka z miękką okładką i klejonym grzbietem) |
Wydane | 15 lipca 2009 |
ISBN13 | 9783639175707 |
Wydawcy | VDM Verlag |
Strony | 172 |
Wymiary | 258 g |
Język | English |
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