QUANTITATIVE FLOW VISUALIZATION IN SODIUM VAPOR SEEDED HYPERSONIC HELIUM Academic Article uri icon

abstract

  • Sodium vapor seeded into a hypersonic helium flow through an orifice on a model is used as a tracer to determine velocity profiles. A narrow-linewidth tunable dye laser is scanned across the Doppler-shifted absorption line of the sodium and the resonant fluorescence is observed. Curves showing the velocity-shifted pressure- and temperature-broadened absorption lines at several points in the flow are presented. Fluorescence is strong enough to use this technique for quantitative flow visualization: at each laser frequency, a specific velocity component is highlighted and easily observed by eye.

published proceedings

  • APPLIED PHYSICS LETTERS

author list (cited authors)

  • MILES, R. B., UDD, E., & ZIMMERMANN, M.

citation count

  • 22

complete list of authors

  • MILES, RB||UDD, E||ZIMMERMANN, M

publication date

  • March 1978