Coherent Structures in Turbulent Flames. II.
Interim rept. 1 Aug 79-1 Aug 80,
SHEFFIELD UNIV (ENGLAND) DEPT OF CHEMICAL ENGINEERING AND FUEL TECHNOLOGY
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The aim of this investigation is to obtain increased understanding of turbulent combustion in flows related to propulsion systems. Simultaneous measurements of fluctuating velocity, temperature and local ionization level, have been made with arrays of probes, with variation in probe separations and flame initial conditions. The stored data are processed in a variety of ways, including the use of novel conditional sampling techniques. Information is thus derived on turbulent structure, eddy structure, eddy convection, eddy-reaction interaction, reaction zone structure and mixing. It is demonstrated that individually eddies can exist in flames for substantially longer distances than is apparent from classical space-time cross correlations. Similar techniques are also used in turbulent sprays and in a flame impinging ona flat plate. Author
- Combustion and Ignition