Accession Number : ADA133874

Title :   Chemical Reactions in Turbulent Mixing Flows. Revision.

Descriptive Note : Final rept. 15 Apr 81-14 Apr 82,


Personal Author(s) : Liepmann,H W ; Broadwell,J E ; Dimotakis,P E ; Roshko,A

Full Text :

Report Date : 02 Aug 1983

Pagination or Media Count : 48

Abstract : Work under this contract has proceeded along three main lines, an experimental program covering low heat release combustion of hydrogen and fluorine, and chemically reacting turbulent shear layers and jets in water, a theoretical model development program whose aim is to provide alternatives to gradient diffusion transport models, and a diagnostics development parallel program to advance the state-of-the-art in experimental techniques, as dictated by our main experimental effort. Substantial progress has been made in all three areas. Notably, in the experimental program, we have completed a first set of measurements in our H2 + F2 combustion facility, as well as laser induced fluorescence measurements of chemically reacting jets and shear layers in water. These experiments prove conclusively that gradient transport models are inappropriate in describing these flows. In the theoretical area, we have shown good agreement between a simple mixing model, developed under this contract sponsorship, and our measurements. In the diagnostics area, important advances have been made in laser Doppler velocimeter, high speed thermometry, laser induced fluorescence and others.

Descriptors :   *Combustion , *Turbulent flow , *Chemical reactions , Hydrogen , Fluorine , Heat of combustion , Turbulence , Shear properties , Mixing , Layers , Entrainment , Thermal analysis , Models , Laser induced fluorescence , Laser velocimeters

Subject Categories : Physical Chemistry
      Fluid Mechanics
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE