Title

Mean-flow characteristics of turbulent curved jets in a moderately confining space

Document Type

Conference Proceeding

Date of Original Version

1-1-1997

Abstract

The experiment and theory reported are concerned with mean-flow characteristics of turbulent curved jets in a moderately confined space, including the evolution of an asymmetrical turbulent shear layer acted under pressure gradient and single-side impinging of the jet around the reattachment point. The experiments are performed in two cases with the Reynolds number Re = 130,000 and 270,000, which is based on the nozzle width, for formation of a turbulent curved jet. The mean-flow velocity field is measured and shows that the curved jet undergoes three stages in its evolution: the initial development with a potential core, a self-similar but asymmetric shear layer, and reattachment. The corresponding test cases are simulated by the standard k-ε model. The results are compared with measurement and the model prediction is poor with 35% average derivation of reattached prediction and incorrect velocity profile shapes in the internal shear layer.

Publication Title

American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED

Volume

24

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