Accession Number:

AD0421057

Title:

THE WALL-JET IN A MOVING STREAM,

Descriptive Note:

Corporate Author:

SYRACUSE UNIV RESEARCH INST N Y

Personal Author(s):

Report Date:

1963-08-20

Pagination or Media Count:

1.0

Abstract:

The wall-jet is the flow of fluid emanating from a narrow slot and blowing over a rigid wall. The width of the slot is of the order of the boundary layer on the infinite wall and the jet, in this case, mixes with a stream moving with constant velocity. This flow has drawn considerable basic and applied interest in the past few years for it has the characteristics of both a boundary layer and a free mixing flow. The present experimental investigation of a plane, steady, turbulent wall-jet with negligible longitudinal pressure gradients in a constant moving stream, with varying ratios of jet to free stream velocity definitely supports Glauerts reasoning The Wall-Jet. J.Fluid Mech., v.1, part 6, 1956, though the precise point of partition of the flow might be in question. The inner layer is constantly losing momentum due to the frictional stresses at the wall, while the outer layer preserves its momentum the division now occurring at the point of zero shear which is not at the maximum velocity. The analysis and experimental results are compared with those of previous investigators and a definite comparison of this work with those performed in a quiescent free stream is achieved through transformation of coordinates. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE