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2021
Combustion occurs at supersonic speeds in a scramjet engine. Lower air residence time is the factor affecting proper fuel–air mixing, flame propagation and cooling of engine components. This current study includes systematic review of fuel–air mixing inside the combustor through various design changes and augmentations and strides to present at the ...
Riyan Cyriac Jose +3 more
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Combustion occurs at supersonic speeds in a scramjet engine. Lower air residence time is the factor affecting proper fuel–air mixing, flame propagation and cooling of engine components. This current study includes systematic review of fuel–air mixing inside the combustor through various design changes and augmentations and strides to present at the ...
Riyan Cyriac Jose +3 more
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Numerical study of a scramjet engine flow field
19th Aerospace Sciences Meeting, 1981A computer program has been developed to analyze the turbulent reacting flow field in a two-dimensional scramjet engine configuration. The program numerically solves the full two-dimensional Navier-Stokes and species equations in the engine inlet and combustor, allowing consideration of flow separation and possible inlet-combustor interactions.
Drummond, J. Philip +1 more
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2021
The turbojet and turbofan engines discussed in detail in the previous chapters are designed for high subsonic cruise speeds. The addition of an afterburner allows the turbojet engine to operate at transonic speeds for short periods of time. As shown in Fig. 1.1, for sustained supersonic flight speeds, ramjet or scramjet engines are necessary. These are
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The turbojet and turbofan engines discussed in detail in the previous chapters are designed for high subsonic cruise speeds. The addition of an afterburner allows the turbojet engine to operate at transonic speeds for short periods of time. As shown in Fig. 1.1, for sustained supersonic flight speeds, ramjet or scramjet engines are necessary. These are
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Historical Survey on Enhanced Mixing in Scramjet Engines
Journal of Propulsion and Power, 1999Select methods are reviewed that have been used by the scramjet community to enhance mixing of fuel with oxidizer to achieve high combustion efe ciency with reduced length combustors. The review also includes research on enhanced supersonic free shear layer mixing from the jet noise reduction community.
John Seiner, S. Dash, D. Kenzakowski
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Noise generated in a scramjet engine
2023The flow field inside a scramjet engine is complex, with unsteady flow features. These unsteady flow features may couple with the scramjet engine’s structure resulting in fluid-structure interactions. Fundamental studies show that such unsteady flows generate acoustic, vorticity and entropy noise and that acoustic noise dominates the other two. To date,
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Reaction- and mixing-controlled combustion in scramjet engines
9th International Space Planes and Hypersonic Systems and Technologies Conference, 1999H2-fueled scramjet engines were tested under Mach 4 (M4) to Mach 8 (M8) e ight conditions, and the local equivalenceratio andcombustion efe ciency weremeasured by gassampling attheengineexit.Correlationbetween the local values of equivalence ratio and combustion efe ciency showed that the M4 combustion was principally reaction controlled and the ...
Tohru Mitani +2 more
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Air vitiation effects in scramjet engines
49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 2013Vitiation is one of the major sources of uncertainty in testing combustors. In fact, in real flight conditions, there is no water in the air entering the combustion chamber, whereas the air entering the test model contains water and radicals. This makes extrapolation to flight difficult.
A. Ingenito +7 more
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High Mach Number Operation of Accelerator Scramjet Engine
Journal of Spacecraft and Rockets, 2023Accelerating scramjet engines could efficiently propel the second stage of an access to space system. A scramjet engine designed to accelerate from Mach 5 to 10 requires geometric features to assist performance at either end of the trajectory, which negatively affects the performance at the opposite end.
Damian Curran +2 more
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2009
The renewed interest in high-speed propulsion has led to increased activity in the development of the supersonic combustion ramjet engine for hypersonic flight applications. In the hypersonic regime the scramjet engine's specific thrust exceeds that of other propulsion systems.
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The renewed interest in high-speed propulsion has led to increased activity in the development of the supersonic combustion ramjet engine for hypersonic flight applications. In the hypersonic regime the scramjet engine's specific thrust exceeds that of other propulsion systems.
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