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Chemical Reactions in Turbulent Mixing Flows

Dimotakis, Paul E. and Broadwell, James E. and Leonard, Anthony (1992) Chemical Reactions in Turbulent Mixing Flows. California Institute of Technology , Pasadena, CA. (Unpublished)

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The purpose of this research is to conduct fundamental investigations of turbulent mixing, chemical reaction and combustion processes in turbulent, subsonic and supersonic flows. Our program is comprised of several parts: a. an experimental effort, b. an analytical effort, c. a computational effort, d. a modeling effort, and e. a diagnostics development and data-acquisition effort, the latter as dictated by specific needs of the experimental part of the overall program. Our approach has been to carry out a series of detailed theoretical and experimental studies of turbulent mixing in primarily in two, well-defined, fundamentally important flow fields: free shear layers and axisymmetric jets. To elucidate molecular transport effects, experiments and theory concern themselves with both reacting and non-reacting flows of liquids and gases, in fully-developed turbulent flows, i.e., in moderate to high Reynolds number flows. The computational studies are, at present, focused at fundamental issues pertaining to the computational simulation of both compressible and incompressible flows. Modeling has been focused on both shear layers and turbulent jets, with an effort to include the physics of the molecular transport processes, as well as formulations of models that permit the full chemical kinetics of the combustion process to be incorporated. Our primary diagnostic development efforts are currently focused on data-acquisition electronics to meet very high-speed, high-volume data requirements, the acquisition of single, or a sequence, of two-dimensional images, and the acquisition of data from arrays of supersonic flow sensors. Progress has also been made in the development of a dual-beam laser interferometer/correlator to measure convection velocities of large scale structures in supersonic shear layers and in a new method to acquire velocity field data using pairs of scalar images closely spaced in time.

Item Type:Report or Paper (Technical Report)
Additional Information:© 1992 California Institute of Technology. Air Force Office of Scientific Research Grant No. 90-03004 Final Technical Report: Period ending 14 May 1992.
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)90-0304
Record Number:CaltechAUTHORS:20141020-101605714
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50542
Deposited On:20 Oct 2014 18:21
Last Modified:03 Oct 2019 07:24

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