An Experimental Investigation of Reactive, Turbulent, Recirculating Jet Mixing
Abstract
An experimental investigation of ducted, two-stream, subsonic, turbulent jet mixing with recirculation was conducted. A primary jet of air at a mass flow rate of 0.580 1bm/sec and bulk velocity of 335 ft/sec was surrounded by an outer hydrogen stream at a mass flow rate of 0.002 1bm/sec and bulk velocity of 3 ft/sec (overall equivalence ratio of 0.12). The ratio of the duct to inner nozzle diameter was 2.5. Radial distributions of mean axial and radial velocity, axial and radial turbulence intensity, velocity cross correlation, gas composition, static temperature, and total pressure, as well as axial distribution of wall static pressure, are presented for axial stations from zero to six duct diameters from the nozzle exit plane, both with and without chemical reactions. The maximum turbulent intensities which occurred in the center of the mixing layer and within the recirculation eddy were very high, having values in excess of 20 percent of the jet exit velocity. The data clearly indicate that the mixing is slower in the chemically reactive flow field than in the nonreactive flow field and that the presence of chemical reactions had a significant effect on the size and location of the recirculation zone within the mixing duct.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1980
- Accession Number
- ADA084546
Entities
People
- G. D. Smith
- T. V. Giel
Organizations
- Arnold Engineering Development Complex