๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

PREDICTION OF AEROFOIL WAKE SUBJECTED TO THE EFFECTS OF CURVATURE AND PRESSURE GRADIENT

โœ Scribed by E. G. TULAPURKARA; V. RAMJEE; JACOB GEORGE

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
679 KB
Volume
22
Category
Article
ISSN
0271-2091

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โœฆ Synopsis

Experimental data on the development of wakes in a straight duct, a curved duct, a curved diffuser and a straight diffuser are compared with computations based on a finite volume scheme incorporating the k-c model of turbulence. The results show that the computations based on the standard k--E model are able to satisfactorily capture only the mean velocity profiles. To improve the predictions, several modifications to the model are tried out. Close agreement between experiment and computation as regards&velocity profiles, wake parameters and profiles of the turbulent kinetic energy k and Reynolds shear stress u'v' is obtained when modification to the model constant C,, based on the curvature parameter and the ratio of the production of turbulent kinetic energy to its rate of dissipation, is incorporated. The modified model is also able to capture the asymmetry in the profiles of k and u" caused by the curvature and its enhancement due to the additional presence of an adverse pressure gradient.

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