| 摘要 |
System comprises duct with entire power plant within a duct. Axial flow compressor driven by vapor turbine produces entire thrust in form of airflow. Combustor combines minor portion of airflow with fuel and burns mixture to produce heat for vaporizing suitable working fluid. Latter may be water, mercury, or one of the alkali metals. Vaporized fluid goes to turbine and operates it to drive compressor. Exhaust from turbine goes to condenser located in airflow so that all rejected heat is added to airflow within duct to increase its energy. The vaporizer and turbine may be located within a center body to conserve heat for shaft horsepower. Combustion gases mix with air within duct so there is no primary combustion gas jet. High velocity of airflow is still much lower than turbojet, producing considerable noise reduction. Lower temperature of air further reduces noise and makes possible maximum use of acoustic surfaces inside duct. All heat rejected or lost goes into airflow to produce maximum efficiency. High cycle efficiency results in low hydrocarbon exhaust emission.
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