A new detonation engine can dispersed the aircraft to 20,000 km / h15 октября, 2021
American engineers reported that for the first time they were able to catch a steady explosive wave and turn her energy into traction. The new engine with an oblique detonation wave is able to overclock the aircraft to 17 sound velocities or about 20,000 km / h and in the potential to bypass the hypersonic direct-flow air-reactive installation.
Delagration is a high-temperature combustion of fuel in the presence of oxygen — a relatively safe and controlled method of isolating chemical energy and turning it into motion. That is why it is widely used in transport. But if you need to get the maximum available energy from the unit of fuel, it is better to arrange an explosion.
Detonation is faster and much destructive. It does not necessarily require oxygen, just explosive material and some push sufficient strength to disrupt the energy bonds of molecules. The shock wave of the explosion spreads with supersonic speed, throwing a huge amount of energy.
Rotary detonation engines in which the shock wave of one explosion starts the next inside the ring-shaped channel, was considered impossible until experts from the University of Central Florida were not
The engine with an oblique detonation wave creates a stable and fixed long-term detonation in space, which allows you to generate significantly more energy and spend less fuel, compared with the current technologies,
For this purpose, an experimental prototype HyperReact was built — the device less meter long, consisting of a pipe divided into three sections. In the first preconception lights a stream of hydrogen fuel mixed with air. Four aircraft accelerate the flow to the desired speed. In the second section there is a nozzle with an asymmetric cross section. Here the main fuel injector adds 99.99 percent hydrogen into hot compressed air, which runs through the pipe. The mixture accelerates to 5 masks, before hitting the third section, where detonation occurs.
Then, as usual, the explosion lasts micro or milliseconds, the engineers managed to extend the effect until the fuel supply was turned off — about three seconds. This is enough to prove to work the installation, said Karim Ahmed, one of the researchers.
Now the task of developers is to understand how to dynamically change the fuel mixture, the flow rate and the angle of inclination to maintain the stability and controllability of detonation in various conditions.
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