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Sadhana

, Volume 12, Issue 1–2, pp 1–14 | Cite as

Observations of supersonic free shear layers

  • D Papamoschou
  • A Roshko
Turbulent Flows

Abstract

Visual spreading rates of turbulent shear layers with at least one stream supersonic were measured using Schlieren photography. The experiments were done at a variety of Mach number-gas combinations. The spreading rates are correlated with a compressibility-effect parameter called the convective Mach number. It is found that for supersonic values of the convective Mach number, the spreading rate is about one quarter that of an incompressible layer at the same velocity and density ratio. The results are compared with other experimental and theoretical results.

Keywords

Supersonic free shear layers turbulent shear layers convective Mach number spreading rate 

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Copyright information

© Indian Academy of Sciences 1988

Authors and Affiliations

  • D Papamoschou
    • 1
  • A Roshko
    • 1
  1. 1.Department of AeronauticsCalifornia Institute of TechnologyPasadenaUSA

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