Research on Aerodynamic Characteristics of Low-speed AerodynamicConfiguration of BWB Analog with and without Ducted Fan

Abstract

With the development of aviation aircraft, the research on new aerodynamic configuration design has become the focus of power country in aviation. The actuator disk model applied in ducted fan based on self-developed “TRIsonic Platform”(TRIP 3.0) is developed, and the aerodynamic characteristics of low-speed aerodynamics configuration of BWB analog with and without ducted fan are analyzed. Firstly, the validated numerical example of a single propeller is analyzed. Secondly, in order to achieve the designed thrust of fan, the key parameters of blade number, mounting angle and rotational speed of an isolated ducted fan are calculated. Finally, a BWB analog low-speed aerodynamic configurations with and without ducted fan are presented. The results show that the computational results of thrust and torque of a single propeller are in agreement with the testing data. The distribution of pressure coefficient at fuselage and tail had been influenced obviously by ducted fan. By sucking the flow around ducted fan, the angle of attack of horizontal tail decreases and the speed of flow above fuselage increases. Therefore, the lift and pitching moment coefficients of fuselage and horizontal tail changes significantly. Moreover, with the effect of ducted fan in the range of little angle of attack, and pitching moment of fuselage is increased and horizontal tail is decreased, but for the entire aircraft, the different of lift and pitching moment coefficients with and without ducted fan is comparatively small.

Keywords

• actuator disk
• aerodynamics configuration
• bwb
• ducted fan
• propeller