| he near field, isothermal flow of a full scale, high swirl burner is considered. The burner quarl shape is similar to the exit shape of a horned instrument: a curved, diverging surface over which air flows. Thus, there is a combination of both lateral and axial strains and swirl in the azimuthal direction.;A full scale burner has been assembled and used in a cold flow experiment. Flow visualization in both the vertical and horizontal planes has been performed. Velocity measurements were obtained using a three-beam, two component laser Doppler anemometer. Data were obtained in the near field with and without a quarl. Radial profiles of the axial, radial and tangential components of mean velocity and velocity fluctuation intensity are obtained at several axial locations. The velocity vectors in both the vertical and horizontal planes are presented to assist in flow visualization. Structure parameters of the fluctuating velocity intensities have been constructed. The flow over the burner wall exhibits an outer and inner region, which are characterized by a constant negative axial velocity and a wall jet behavior, respectively.;The flow field is predicted using three models of turbulence. Specifically, the... |
