Thermal Considerations of Oblique Detonation Wave Anchoring Features

Oblique Detonation Waves are a proposed form of hypersonic detonation propulsion capable of Mach 7-17+ powered flight. This mode of detonation has been successfully stabilized in ground test facilities in a single floor-mounted wedge. Lifting the anchor off the floor in a floating configuration minimizes boundary layer effects but now subjects the wedge to stagnation point heating, a significant increase in heating. A 1D model was developed and coupled to the heat conduction equation, compared to experimental tests, and used for selecting a passively cooled material for future ground testing. The results show that conventional engineering materials will exceed their service temperatures within the test time if at sharp radii. Larger radii will survive but risk prompt detonation, leaving the ODW structure undecipherable. C103, Niobium refractory alloy, with a disilicide coating allows a sharp wedge to be preserved over multiple short duration experimental runs. For the floating wedge configuration to be viable advanced material solutions must be considered.