Mean-flow characteristics of turbulent curved jets in a moderately confining space
Date of Original Version
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.
American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
Hu, Zhimin, and F. M. White. "Mean-flow characteristics of turbulent curved jets in a moderately confining space." American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED 24, (1997). https://digitalcommons.uri.edu/mcise_facpubs/1022