image: Pictured is a conceptual Oblique Detonation Wave Engine-powered hypersonic aircraft. view more
Credit: Background image credit: NASA. Composite image credit: Daniel A. Rosato.
A study demonstrates an experimental framework for developing detonation-based propulsion. Conventional propulsion fuels and technologies produce thrust through deflagration, which is a subsonic reaction wave, but supersonic and hypersonic propulsion may be required for future terrestrial and interplanetary travel. Detonation produces supersonic waves and is an intense form of energy release generally associated with blast explosions and supernovas. If controlled, detonation may be a method to achieve ultra-high-speed travel. Kareem Ahmed and colleagues discovered an experimental configuration to produce and analyze the dynamics of controlled detonations. The configuration consists of a standing oblique detonation wave, fixed in space on a ramp. Fuel is injected in a hypersonic flow, which auto-ignites a steep shock wave. The intersection of the shallow and steep waves creates an extremely high-pressure and high-temperature triple point that produces a detonation wave sustained for the duration of active fueling. The authors found multiple flow regimes over the course of the development of a detonation wave as well as conditions for stable versus unstable detonation waves. According to the authors, the experimental configuration allows for a possible pathway to develop and integrate ultra-high-speed detonation technology, enabling hypersonic propulsion and advanced power systems.
Article #21-02244: "Stabilized detonation for hypersonic propulsion," by Daniel A. Rosato, et al.
MEDIA CONTACT: Kareem A. Ahmed, University of Central Florida, Orlando, FL; tel: 407-823-5710; email: Kareem.Ahmed@UCF.edu
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Journal
Proceedings of the National Academy of Sciences