Experimental study on mixing enhancement in two dimensional supersonic flow

Abstract Studies on mixing enhancement with two dimensional (2D) lobed nozzle have been conducted in a dual stream supersonic flow facility. The distributions of momentum flux, stagnation pressure and stagnation temperature across a plane at different axial distances from the nozzle exit were considered as a measure of mixing. The results indicated an enormous enhancement in mixing when 2D lobed nozzle was employed in comparison with conventional plain 2D nozzle. The enhanced mixing performance could be attributed to the large scale axial vortices observed in the flow-field of subsonic lobed nozzles by earlier investigators.

[1]  Kenneth J. Wilson,et al.  Noncircular jet dynamics in supersonic combustion , 1989 .

[2]  J. Boris,et al.  Mixing enhancement in supersonic shear layers. III - Effect of convective Mach number , 1988 .

[3]  E. Gutmark,et al.  EFFECT OF CONVECTIVE MACH NUMBER ON MIXING OF COAXIAL CIRCULAR AND RECTANGULAR JETS , 1991 .

[4]  Mo Samimy,et al.  Compressibility effects in free shear layers , 1990 .

[5]  A. A. Sfeir,et al.  The velocity and temperature fields of rectangular jets , 1976 .

[6]  Ramesh Kumar,et al.  Studies on freejets from radially lobed nozzles , 1995 .

[7]  Jay P. Boris,et al.  Mixing enhancement in supersonic shear layers , 1987 .

[8]  T. Barber,et al.  Experimental investigation of three-dimensional forced mixer lobe flow fields , 1988 .

[9]  J. Kurian,et al.  Enhancement of thermal mixing in coaxial supersonic jets , 1996 .

[10]  A. A. Sfeir,et al.  Investigation of Three-Dimensional Turbulent Rectangular Jets , 1979 .

[11]  R. W. Paterson,et al.  Enhanced mixing of supersonic jets , 1991 .

[12]  E. Gutmark,et al.  Azimuthal instabilities and mixing characteristics of a small aspectratio slot jet , 1987 .

[13]  Walter M. Presz,et al.  Forced mixer lobes in ejector designs , 1986 .

[14]  R. W. Paterson,et al.  Turbofan Mixer Nozzle Flow Field—A Benchmark Experimental Study , 1984 .

[15]  S. Ragab.  Instabilities in the free shear layer formed by two supersonic streams , 1988 .

[16]  P. Sforza,et al.  Heated Three-Dimensional Turbulent Jets , 1979 .

[17]  James J. McGuirk,et al.  Turbofan forced mixer/nozzle temperature and flow field modelling , 1989 .

[18]  A. Roshko,et al.  The compressible turbulent shear layer: an experimental study , 1988, Journal of Fluid Mechanics.

[19]  A. Roshko,et al.  On density effects and large structure in turbulent mixing layers , 1974, Journal of Fluid Mechanics.