The technology of flights using a blast wave at previously inaccessible speeds has been developed

Shock wave application can provideefficient mixing of oxidizer and fuel in supersonic engines, which will allow you to travel at speeds several times the speed of sound. Scientists from the American University of Southern California have experimentally confirmed the idea of ​​controlling the process of mixing air and fuel using shock waves.

The mixing process of the oxidizer (air) isthe main problem in the development of hypersonic ramjet engines (scramjet or scramjet). Until this problem is solved, flights are possible at speeds from Mach 6 to Mach 9, while the design speed allows you to move at speeds above Mach 20.

Scrumjet type motors are notprovides for the presence of tanks for oxidizers, since atmospheric air is used as oxidants, supplied to the engine at high speed during the flight of the object. The combustion process of the fuel-air mixture proceeds at a speed several times higher than the speed of sound. The system operates in a continuous mode, and the aircraft must move at a speed exceeding a certain threshold value. The main problem is the efficient mixing of air and fuel, which takes place just before combustion.

There are no scrumjet type engines in the air intakesno moving mechanisms, since gigantic overloads arise in the device that can disable the mechanisms. This design is safer and simpler, which is the main advantage of a scramjet over turbojet engines. To influence the air flow entering the engine, scientists suggested using a shock wave.

During the tests, it was proved that the shock wavewill be able to break the air flow, slowing down its movement, which will allow creating a fuel injection system to efficiently obtain the air-fuel mixture necessary for the operation of the scrumjet. A combustion chamber is currently under development, in which the new technology will be used.

Source: phys