An ongoing study of the transition to turbulence of gas jet diffusion flames conducted in a reduced microgravity environment at the NASA Lewis 2.2 second drop tower is described. The experiments were based on propane injected into quiescent air. Several differences with the corresponding normal gravity process were observed. In particular, large scale structures appeared intermittently in microgravity which are manifested at the flame base and convected down stream. As the Reynolds number increased, a continuous train of structures was observed along the flame front. These observations are explained by instability of the shear layer associated with injection of flow into quiescent surroundings.
Effects of Gravity on the Transition to Turbulence of Gas Jet Diffusion Flames
AIAA, Aerospace Sciences Meeting and Exhibit ; 1993 ; Reno, NV, United States
1993-01-01
Aufsatz (Konferenz)
Keine Angabe
Englisch
Effects of gravity on laminar gas jet diffusion flames
TIBKAT | 1970
|Properties of turbulence in turbulent diffusion flames
Kraftfahrwesen | 1981
|Laminar diffusion flames under micro-gravity conditions
AIAA | 1988
|Isolation of gravity effects on diffusion flames by magnetic field
Tema Archiv | 2010
|