Turbulent mixing in swirling flow
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Massachusetts Institute of Technology. Gas Turbine and Plasma Dynamics Laboratory
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The effect of swirl on the mixing of two gas streams of the same density in coaxial annular geometry has been examined. The flow is studied via a fluorescent tracer, 2-3 biacetyl. Through direct excitation, collisional excitation, and collisional de-excitation of the tracer, the turbulent transport, molecularly mixed and unmixed regions in the flow are visualized. A three dimensional structure flattened in the azimuthal direction is observed. It is suggested that this structure is the result of the growth of the unstable azimuthal modes as limited by a turbulent eddy viscosity.
Description
September 1978 Originally presented as the author's thesis, Sc. D. in the M.I.T. Dept. of Aeronautics and Astronautics, 1979 Includes bibliographical references (leaf 49)
Date issued
1978Publisher
Cambridge, Mass. : Massachusetts Institute of Technology, Gas Turbine & Plasma Dynamics Laboratory, [1978]
Series/Report no.
GT & PDL report ; no. 143