Imaging the evolution of turbulent structures in a hypersonic boundary layer Conference Paper uri icon

abstract

  • 1999 American Institute of Aeronautics & Astronautics. The convection and temporal evolution of flow structures in a Mach 8, zero pressure gradient turbulent boundary layer have been examined using carbon dioxide enhanced, double-pulsed Filtered Rayleigh Scattering (FRS). Image data were acquired for several elevations outside of and within the boundary layer at a free stream unit Reynolds number of 1.3 107 m-1, Structure evolution was observed over distances of several centimeters to evaluate the rate at which the outer layer bursts grow. Preliminary analysis reveals that the structures extending outside the boundary layer (1.30) move with the free stream while further into the boundary layer, the average velocity decreases to 0.95U_ - 0.98U_. These data clearly show the motion and growth of the discrete turbulent structures and demonstrate the value of enhanced FRS diagnostics for studying the evolution of a turbulent boundary layer. The possibility of successfully correlating turbulent structure image data with conventional hot wire/film data in a hypersonic flow is now at hand.

name of conference

  • 37th Aerospace Sciences Meeting and Exhibit

published proceedings

  • 37th Aerospace Sciences Meeting and Exhibit

author list (cited authors)

  • Erbland, P., Murray, R., Etz, M., Huntley, M., & Miles, R.

publication date

  • January 1, 1999 11:11 AM