Statistical characteristics of velocity, concentration, mass transport, and momentum transport for coaxial jet mixing in a confined ductAn experimental study of mixing downstream of coaxial jets discharging into an expanded circular duct was conducted to obtain data for the evaluation and improvement of turbulent transport models currently used for combustor flow modeling. A combination of turbulent momentum transport rate and two velocity component data was obtained from simultaneous measurements with a two-color LV system. A combination of turbulent mass transport rate, concentration and velocity data was obtained from simultaneous measurements with laser velocimeter (LV) and laser induced fluorescence (LIF) systems. These measurements were used to obtain mean, second central moment, skewness and kurtosis values for three velocity components and the concentration. These measurements showed the existence of countergradient turbulent axial mass transport where the annular jet fluid was accelerating the inner jet fluid. Results from the study are related to the assumptions employed in the current mass and momentum turbulent transport models.
Document ID
19830066681
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Johnson, B. V. (United Technologies Research Center East Hartford, CT, United States)
Bennett, J. C. (Connecticut, University Storrs, CT, United States)