Accession Number : AD0704983

Title :   LAMINAR JET MIXING WITH INITIAL AND BOUNDARY EFFECTS.

Descriptive Note : Technical rept.,

Corporate Author : CINCINNATI UNIV OHIO DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Tsuei,Y. G. ; Allis,E. W.

Report Date : APR 1970

Pagination or Media Count : 30

Abstract : The objectives of the report are to investigate the flow field and the wall shear stress for laminar tangential injection. The effects of the boundary and initial velocity profiles under zero pressure gradient are considered. A linearized approximation with a coefficient chosen from the parameters of the boundary layer was used to analyze the slot injection. It is found that wall shear stress is almost independent of the ratio of jet velocity to free stream velocity and the ratio of slot height to initial outside boundary layer thickness. It is also found that the effectiveness of the jet mixing is greater for large ratios of slot height to initial outside boundary layer thickness than for small ratios. The asymptotic solution of the velocity distribution far downstream is compared with the Blasius profile and good agreement is found. The results can be used for film cooling to estimate the spacing between the injection slots for effective protection. (Author)

Descriptors :   (*INJECTION, LAMINAR FLOW), (*JET MIXING FLOW, LAMINAR FLOW), FLOW FIELDS, BOUNDARY LAYER, EQUATIONS OF MOTION, SHEAR STRESSES, THICKNESS, FILM COOLING

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE