Summary
Coherent structures are of importance for mixing and reaction in jet diffusion flames. Using a Toepler-schlieren set up with a nano-light as the light-source, a double vortex structure, a high frequency oscillation and a low frequency oscillation separated by the reaction front, is observed. At higher Reynolds numbers the vortices break down to threedimensional turbulence retaining some degree of coherence. Compared with constant density jets exhibiting one vortex system only, jet flames are more stable and the vortices are by far more dominant. The effect of combustion on hydrodynamic instability is discussed by the aid of the inviscid disturbance differential equation.
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© 1982 Springer-Verlag Berlin Heidelberg
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Eickhoff, H. (1982). Instability and Coherent Structures in Jet Flames. In: Haase, W. (eds) Recent Contributions to Fluid Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-81932-2_6
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DOI: https://doi.org/10.1007/978-3-642-81932-2_6
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-81934-6
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