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Engineering topics

Schetz, J. A.

Publications and source records attributed to Schetz, J. A..

50 records · Page 3

Numerical calculation of turbulent boundary layers including suction or injection with binary diffusion.

The modelling of turbulent transport processes with an eddy viscosity representation of the inner, wall region for cases with suction or injection is considered in detail. It is shown how the van Driest solid wall model can be logically extended for such cases. Further, a new inductive model is developed. Finite difference calculations using the new inductive model are shown to be in good agreement with experimental data over a wide range of conditions. Lastly, a new method for calculating the wall shear within a finite difference solution is developed. This procedure greatly relaxes the requirement for fine grid spacing in the vertical direction.

Schetz, J. A.↗

Turbulent jet mixing in a supersonic stream

An experimental study of turbulent, subsonic, coaxial jet mixing of air in a supersonic air stream is presented. Data taken at five axial stations downstream of the exit of the jet supply tube, which was suspended through the nozzle throat of a supersonic wind tunnel, are given in the form of total pressure, Mach number, and velocity distributions. An investigation of the effect of swirl as a mixing aid was conducted. Swirl, produced by tangential injection of 50% of the total air mass flow leaving the jet supply tube, was examined through Schlieren photographs and total pressure surveys. From a comparison of nonswirl and swirl data, it is concluded that the swirl has no discernible effect on the mixing.

Swanson, R. C.↗

Turbulent mixing /analysis/

Approximate methods for solving differential equations of motion to predict free turbulent mixing processes - single-form eddy viscosity model

EDDY VISCOSITY↗

Two-dimensional mixing studies

Two-dimensional turbulent mixing scaling laws of mixing, heat transfer and skin friction for use in design of scramjet engine combustors

SCRAMJET ENGINE↗