AbstractThe flameholding characteristics in a kerosene-fueled scramjet combustor with a tandem dual-cavity were investigated experimentally under various inlet stagnation pressure conditions. Flame stabilization locations were judged by the pressure distributions and flame luminescence images. The results show that at lower and higher equivalence ratios, the flame was stabilized in the downstream and upstream cavities, respectively. While at intermediate range of equivalence ratio the flame was oscillating between the two cavities. The inlet stagnation pressure has a significant impact on the flameholding characteristics by affecting the relative pressure rise and the flame speed. The transition of flame stabilization location can occur in a higher local flow Mach number in the case of the higher inlet stagnation pressure.
HighlightsKerosene flame stabilization location of a dual-cavity flameholder is determined.Effect of inlet stagnation pressure to flameholding characteristics is analyzed.A mapping of flame locations is obtained to reflect the transition boundary.
Investigation of flameholding characteristics in a kerosene-fueled scramjet combustor with tandem dual-cavity
Acta Astronautica ; 140 ; 126-132
2017-08-10
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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