Quantitative rainbow schlieren deflectometry as a temperature diagnostic for nonsooting spherical flames.
Numerical analysis and experimental results are presented to define a method for quantitatively measuring the temperature distribution of a spherical diffusion flame using rainbow schlieren deflectometry in microgravity. The method employed illustrates the necessary steps for the preliminary design of a rainbow schlieren system. The largest deflection for the normal gravity flame considered in this paper is 7.4 x 10(-4) rad, which can be accurately measured with 2 m focal-length collimating and decollimating optics. The experimental uncertainty of deflection is less than 5 x 10-(5) rad.
Feikema
Douglas A
DA
National Aeronautics and Space Administration, Glenn Research Center at Lewis Field, Cleveland, Ohio 44135, USA. douglas.feikema@grc.nasa.gov