In this paper, we first examine the wave morphology induced by reactant thermal stratification in hypersonic reactive flows. Three flow regimes are observed: autoignition-driven reaction front, detonation wave, and decoupled shock/reaction front. The results suggest that local autoignition behavior can be significantly influenced by reactivity nonuniformity in the reactive flow; and an undesirable detonation wave can be initiated given a suitable temperature gradient. This also indicates that oblique detonation waves can be generated without mechanical devices such as blunt bodies and wedges.
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Yang et al. (2024) studied this question.
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