Reduced-order modeling of unsteady hypersonic aerodynamics in multi-dimensional parametric space
Zhiqiang Chen, Yonghui Zhao and Rui Huang
Abstract: A novel reduced order model (ROM) for unsteady hypersonic aerodynamics is developed, which is applicable for the variations of multi-parameters. The key to the developed ROM lies in the CFD-based model reduction of the steady aerodynamic component, which stems from the quasi-steady nature of aerodynamic forces in the hypersonic regime. Concretely, the proper orthogonal decomposition (POD) method,combined with Kriging interpolation, is used to construct the ROM for the steady aerodynamic component; meanwhile the unsteady part is directly obtained from Donov’s third-order piston theory. The new procedure is applied to a three-dimensional low aspect ratio wing (Lockheed F-104 Starfighter wing). It isshown that the developed ROM is ableto accurately predict the unsteady hypersonic aerodynamic loads over a wide range of different flight conditions compared with the direct CFD computation.
原文链接：https://doi.org/10.1016/j.ast.2019.01.035
