Skip to main content Accessibility help
×
Home

Turbulent mixing layer from two non-parallel streams

  • M. A. Azim (a1) and A. K. M. S. Islam (a1)

Abstract

An experimental investigation has been conducted on the mixing layers produced from the merging of two non-parallel streams. To study the effect of velocity ratio on its development, mixing layers were produced with velocity ratios 0·7, 0·8 and 0·9. The boundary layers were untripped and initially turbulent in all the cases. For each velocity ratio, measurements were made at six streamwise locations. It was found that for velocity ratios 0·7 and 0·8, mixing layers appear to attain self-similarity but failed for 0·9 within the measurement domain. The development distance of the mixing layer flow was increased with increasing velocity ratio and the splitter wake was found to play an important role in its development. The mixing layer growth was found to decrease with increasing velocity ratio though the spread of the layer was larger at the high speed side.

Copyright

References

Hide All
1. Townsend, A.A. Structure of Turbulent Shear Flow, 1976, Cambridge University Press, Cambridge.
2. Bradshaw, P., The effect of initial conditions on the development of a free shear layer, J Fluid Mech, 1966, 26, pp 225236.
3. Mehta, R.D. and Westphal, R.V., Near-field turbulence properties of single-and two-stream plane mixing layers, Exp Fluids, 1986, 4, pp 257266.
4. Mehta, R.D., Effects of velocity ratio on plane mixing layer development: Influence of the splitter plate wake, Exp Fluids, 1991, 10, (4), pp 194204.
5. Dziomba, B. and Fiedler, H.E., Effect on the initial conditions on two-dimensional free shear layers, J Fluid Mech, 1985, 152, pp 419442.
6. Bell, J.H. and Mehta, R.D., Development of a two-stream mixing layer with tripped and untripped boundary layers, AIAA J, 1990, 28, pp 20342042.
7. Oster, D. and Wygnanski, I.J., The forced mixing layer between parallel streams, J Fluid Mech, 1982, 123, pp 91130.
8. Hussain, A.K.M.F. and Zedan, M.F., Effect of the initial condition on the axisymmetric free shear layer: Effects of the initial momentum thickness, Phys Fluids, 1978, 21, pp 11001112.
9. Hussain, A.K.M.F. and Zedan, M.F., Effect of the initial condition on the axisymmetric free shear layer: Effects of the initial fluctuation level, Phys Fluids, 1978, 21, pp 14751481.
10. Chandrsuda, C., Mehta, R.D., Weir, A.D. and Bradshaw, P., Effect of free stream turbulence on large structure in turbulent mixing layer, J Fluid Mech, 1978, 85, pp 693704.
11. Wood, D.H. and Bradshaw, P., A turbulent mixing layer constrained by a solid surface, Part 2: Measurements in the wall-bounded flow, J Fluid Mech, 1984, 139, pp 347361.
12. Pui, N. K. and Gartshore, I. S., Measurements of the growth rate and structure in plane turbulent mixing layers, J Fluid Mech, 1979, 91, pp 111130.

Related content

Powered by UNSILO

Turbulent mixing layer from two non-parallel streams

  • M. A. Azim (a1) and A. K. M. S. Islam (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.