Christer FUREBY

DOI Number: N/A

Conference number: HiSST-2025-334

The dual-mode ramjet engine is a key candidate for hypersonic propulsion due to its ability to operate across a wide Mach number range. It requires a turbojet for low-speed operations (Ma≲2), while functioning as a thermally choked ramjet at moderate speeds (Ma≈3 to 4) and as a scramjet at high speeds (Ma≈5 to 8). Transitions between these modes are critical: the turbojet-to-ramjet shift is relatively controllable, but the ramjet-to-scramjet transition is complex and governed by aerothermodynamics. This study uses Large Eddy Simulations (LES) to support experimental work by Fotia & Driscoll, aiming to deepen understanding of this transition. The simulations show good agreement with experimental
data and reveal detailed insights into flow behaviour and flame stabilization mechanisms during the ramjet to scramjet mode shift.

Read the full paper here

In Categories: 1.Events, 1.HiSST 2025, Propulsion Systems & Components
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