A patent for a new turbojet engine designed for stable operation at speeds exceeding 3 Mach numbers was registered in the database of the Federal Institute of Industrial Property (FIPS) on February 2. The author of the development is engineer Vladimir Pismenny.
The project is focused on application in supersonic and strategic aviation, including promising analogues of Tu-144, Tu-160 and foreign long-range bombers.
The invention solves one of the key problems of high-speed aviation - the decrease in compressor efficiency with increasing flight speed. In traditional turbojet engines, airflow decreases during acceleration, which limits acceleration and increases fuel consumption.
How the new scheme works
In the proposed design, the engine is regulated according to a special law that maintains the optimal reduced rotor speed depending on the air temperature at the compressor inlet. This allows maintaining maximum airflow in all modes.
The developer uses the principle of "cold afterburning" - increasing thrust by increasing the volume of air pumped, rather than by increasing the gas temperature. This approach reduces thermal load and energy loss.
Estimated characteristics
According to the author's calculations, the maximum flight speed with such an engine can reach M=3.7 - about 4500 km/h.
At M=2.5 mode at an altitude of approximately 20 km, the thrust is up to 12 tons with a specific fuel consumption of 1.24 kgf/h.
Efficiency at speeds above M=3 approaches 47%. For comparison, modern turbofan engines of civil aviation demonstrate efficiency of about 38%.
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