Journal
JOURNAL OF PROPULSION AND POWER
Volume 16, Issue 5, Pages 808-814Publisher
AMER INST AERONAUT ASTRONAUT
DOI: 10.2514/2.5645
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Shadowgraph how visualization and door static pressure measurements have been used to examine the transient behavior of a thermally choked combusting flow. Experiments were performed to examine the effect of varying inlet Mach number and fuel-air equivalence ratio on the nature and extent of the interaction, In all cases a sudden increase in static pressure was measured, followed by a highly turbulent region of sonic how that was seen to propagate upstream along the duct. The nature of the dominant processes causing this pressure discontinuity are still not certain. Some mechanisms that may contribute to this phenomenon are presented. These include separation of the boundary layer in the duct, formation of a detonation, and formation of a near-normal shock wave by the region of thermally choked flow.
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