| 摘要 |
<p>The present invention relates to a method that comprises performing the major part of the air pressure build-up during take-off or subsonic flight using a fan which is rotated by a two-stroke piston engine operating at a nominal power. The pressurised air in which the fan generated turbulence is further fed into an after-burning chamber where an air-fuel load is burnt. The combustion products are further expanded in a jet nozzle. The pressure build-up ratio in the inlet device increases together with the flight speed. Once the supersonic flight speed is reached, the power unit is switched from a motor-compressed operation mode to a ramjet-engine operation mode by decreasing the force supplied by the two-stroke piston engine to the fan while maintaining the pressure build-up ratio close to one.</p> |
