A method for the conceptual design and the comparison of Short Take-Off and Landing transport aircraft with blown flaps is documented. Key aspect for blown flaps is the interdependence of thrust, forward speed, and the aerodynamic forces during take-off and landing. Therefore, the focus of the thesis is on the modeling of the low-speed engine characteristics and the determination of the aerodynamic coefficients from publicly available wind-tunnel data. Based on the low-speed engine characteristics and aerodynamic coefficients, the low-speed control characteristics as well as the balanced field length and landing field length are calculated. The methods developed are integrated into a parametric aircraft model to determine the impact of the Short Take-off and Landing capability on the aircraft design and the overall mission performance. In an application example, regional aircraft with different blown flaps systems are compared to a conventional reference aircraft.
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A method for the conceptual design and the comparison of Short Take-Off and Landing transport aircraft with blown flaps is documented. Key aspect for blown flaps is the interdependence of thrust, forward speed, and the aerodynamic forces during take-off and landing. Therefore, the focus of the thesis is on the modeling of the low-speed engine characteristics and the determination of the aerodynamic coefficients from publicly available wind-tunnel data. Based on the low-speed engine characteristi...
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