Multispecies measurements and mixture fraction imaging in turbulent diffusion flames
| Autor: | J. B. Kelman, S. H. Stårner, Robert W. Bilger, Assaad R. Masri |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Fluid Flow and Transfer Processes
education.field_of_study Materials science Turbulent diffusion Scattering Turbulence business.industry Mechanical Engineering General Chemical Engineering Population Scalar (mathematics) Diffusion flame Aerospace Engineering Combustion Computational physics Physics::Fluid Dynamics symbols.namesake Optics Nuclear Energy and Engineering symbols Rayleigh scattering education business |
| Zdroj: | Experimental Thermal and Fluid Science. 9:119-124 |
| ISSN: | 0894-1777 |
| DOI: | 10.1016/0894-1777(94)90104-x |
| Popis: | We describe methods to obtain two or more simultaneous, quantitative planar images of scalars in turbulent flames. The simplest technique employs a single laser system and one CCD camera for Rayeigh scattering and LIF collection from fuel or the OH radical. More complex arrangements involve two lasers and a separate camera for each scalar. A two-scalar approach for obtaining mixture fraction images is described and implemented with simultaneous Rayleigh and fuel LIF measurements in an acetaldehyde/air turbulent jet diffusion flame. Some 2D images of mixture fraction and scalar dissipation are presented, with a discussion of difficulties, variations, and future extensions of the method. Some quantitative images of OH and temperature are presented for a turbulent natural gas-hydrogen diffusion flame. With this fuel mixture, the Rayleigh data can be interpreted as temperature. The OH is obtained from a fluorescence signal and corrected for ground-state population fraction and quenching with the aid of the Rayleigh data. |
| Databáze: | OpenAIRE |
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