Multi-Fidelity Shape Optimization of a High Lift Reentry Vehicle for a Suborbital Reentry Mission

Kurzfassung

In the present study, the multi-fidelity shape optimization of a high lift re-entry vehicle is investigated. The vehicle shape is optimized for a cruise flight mission with the lift to drag ratio as objective function. The constraints in the vehicles design parameter prevent non-realistic configurations. The optimization is performed by a surrogate based optimization with an inner and outer loop. The inner loop optimizes the flight attitude, the angle of attack and flap deflection for maximum lift to drag ratio. The outer loop finds the best design parameter combination. The hierarchical kriging is used for the multi-fidelity optimization. Within the optimization, the fidelity of the aerodynamic calculation is varied. The low-fidelity aerodynamic solution is calculated by the shock expansion method whereas the higher-fidelity level is generated by Euler calculations.