LOW BOOM LOW DRAG SMALL SIZE SUPERSONIC AIRCRAFT DESIGN
Abstract. The French Aerospace Lab (ONERA) and Japan Aerospace Exploration Agency (JAXA) conducted a collaborative research on low boom and low drag design of small size supersonic aircraft including engine integration perspective. In this collaborative research, the validation of low boom design tools, the optimization study on engine position considering aerodynamics, acoustic, and propulsion performances, and the low boom design of propulsion airframe integrated (PAI) configuration were performed. In this paper, obtained results are summarized and the low boom design of PAI configuration is focused on, because the sonic boom loudness is raised by the engine integration. The applied low boom design tool is based on the free form deformation and the equivalent area with consideration of the change of lift distribution due to deformations. Results show that the sonic boom loudness of PAI configuration can be reduced to almost the same loudness of glider configuration without engine by the horizontal tail optimization.