Abstract The axisymmetric hypersonic vehicle has attracted an increasing attention due to its simple structure and high volumetric efficiency. In order to find the optimal aerodynamic configuration of the axisymmetric hypersonic forebody, a novel parameterization method based on the theory of Non-uniform rational B-spline (NUBRS) curve and conical flows is proposed. Then, the optimization work which couples the global optimization algorithms NSGA-II with the computational fluid dynamics (CFD) fluid analysis is carried out. The optimization results show that configurations with higher lift-to-drag ratio as well as higher volumetric efficiency than the commonly used Von Karman Ogive configuration can be found. By analyzing flow structures of three different representative configurations, the reasons that lead to the different lift-to-drag ratios are found. Finally, the effects of angle of attack on the lift-to-drag ratio of three representative forebody configurations is studied.
Highlights A novel parameterization method of axisymmetric hypersonic forebody based on NURBS theory is proposed. The NUBRS method can establish a direct relationship between the design parameters and resulting geometry. The method can find the axisymmetric hypersonic forebody with high lift-to-drag ratio and high volumetric efficiency. This parameterization method can be also applied to designing other kinds of axisymmetric hypersonic vehicle.
Parameterization and optimization for the axisymmetric forebody of hypersonic vehicle
Acta Astronautica ; 167 ; 239-244
2019-10-26
6 pages
Article (Journal)
Electronic Resource
English
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