Demonstration and analysis of filtered Rayleigh scattering flow field diagnostic system Academic Article uri icon

abstract

  • Filtered Rayleigh scattering (FRS) is accomplished by using a narrow linewidth, injection seeded Nd:YAG laser sheet to induce Rayleigh-Brillouin scattering from a gas in a flow. The scattered light is transmitted through an optical notch filter and imaged onto an intensified CCD camera. The construction and characterization of the optical notch filter and a newly developed frequency measuring apparatus are described. A computer model is used to predict the transmission profile of the optical filter for various temperatures and pressures. The model uses spectroscopic constants taken from the literature and assumes a Boltzmann distribution for the population of states as well as a Gaussian lineshape for the hyperfine absorption lines.

author list (cited authors)

  • Forkey, J. N., Lempert, W. R., & Miles, R. B.

complete list of authors

  • Forkey, JN||Lempert, WR||Miles, RB

publication date

  • December 1996