Three-dimensional velocity measurements in a turbulent, compressible mixing layer

Mark R. Gruber, Nathan L. Messersmith, J. Craig Dutton

Research output: Contribution to conferencePaper

Abstract

A turbulent, compressible mixing layer with a relative Mach number of 1.59 has been investigated experimentally using pressure measurements, schlieren photographs, and velocity measurements. A two-component laser Doppler velocimeter system was used to obtain the transverse velocity profiles across the mixing layer. The system was set up twice: once to obtain the streamwise and transverse velocity components and once to obtain the streamwise and spanwise velocity components. Full development of the mean and fluctuating velocities of the mixing layer required a local Reynolds number based on the freestream velocity difference and the mixing layer thickness on the order of 1 x 105. Results from the fully developed region of the mixing layer showed constant peak values with increasing compressibility of streamwise and spanwise turbulence intensities and primary Reynolds shear stress correlation coefficient along with decreasing peak values of transverse turbulence intensity, normalized primary Reynolds shear stress, and normalized turbulent kinetic energy. Various turbulence profiles demonstrated a reduction of lateral extent on the high speed side of the mixing layer as compared to profiles in incompressible mixing layers. Finally, the Reynolds normal stress ratio σvw decreased with increasing relative Mach number, implying that the mixing layer turbulence became more three-dimensional as compressibility was increased.

Original languageEnglish (US)
StatePublished - Jan 1 1992
EventAIAA/ASME/SAE/ASEE 28th Joint Propulsion Conference and Exhibit, 1992 - Nashville, United States
Duration: Jul 6 1992Jul 8 1992

Other

OtherAIAA/ASME/SAE/ASEE 28th Joint Propulsion Conference and Exhibit, 1992
CountryUnited States
CityNashville
Period7/6/927/8/92

ASJC Scopus subject areas

  • Mechanical Engineering
  • Aerospace Engineering
  • Energy Engineering and Power Technology
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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  • Cite this

    Gruber, M. R., Messersmith, N. L., & Craig Dutton, J. (1992). Three-dimensional velocity measurements in a turbulent, compressible mixing layer. Paper presented at AIAA/ASME/SAE/ASEE 28th Joint Propulsion Conference and Exhibit, 1992, Nashville, United States.