Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 25, 2019 - September 27, 2019
A supersonic civil transport has priority to target noise reduction and aerodynamic performance to become environmentally viable and economically practicable. To match ambitious goals, this research proposes a waverider configuration to solve these primary design of commercial supersonic aircraft. A waverider is famous for providing higher lift-to-drag ratio (L/D) than other conventional design in supersonic and hypersonic flight. The conceptual study of a supersonic waverider was done by previous research to look for an optimal shape that generates lower sonic boom strength and produce high L/D at supersonic cruise condition. This research considers the multipoint study of supersonic and low supersonic flight condition. A waverider has a crucial effect on increases drag in lower Mach number if it takes only a single-point design. This study fills these gaps by optimizing a power-law wedge waverider between two operation phase. Aerodynamic forces of a waverider are solved by numerical simulation using compressible Euler’s equation. The sonic boom strength is predicted based on augmented Burgers equations by considering overpressure peak. Bayesian optimization is conducted to visualize the Pareto-optimal solution for overpressure in normal supersonic flight and drag in low supersonic flight. Besides, the benefit of shape optimization is to address complex design trade-offs and offer physical insight for discussion.
