A simplified theoretical method based on the quasi-steady wing theory wasproposed to study the unsteady aerodynamic forces acting on an airfoil flying in non-uniform flow.Comparison between the theoretical results and...A simplified theoretical method based on the quasi-steady wing theory wasproposed to study the unsteady aerodynamic forces acting on an airfoil flying in non-uniform flow.Comparison between the theoretical results and the numerical results based on nonlinear theory wasmade. It shows that the simplified theory is a good approximation for the investigation of theaerodynamic characteristics of an airfoil flying above sea-waves. From on the simplified theory itis also found that an airfoil can get thrust from a wave-disturbed airflow and thus the total dragis reduced. And the relationship among the thrust, the flying altitude, the flying speed and thewave parameters was worked out and discussed.展开更多
文摘A simplified theoretical method based on the quasi-steady wing theory wasproposed to study the unsteady aerodynamic forces acting on an airfoil flying in non-uniform flow.Comparison between the theoretical results and the numerical results based on nonlinear theory wasmade. It shows that the simplified theory is a good approximation for the investigation of theaerodynamic characteristics of an airfoil flying above sea-waves. From on the simplified theory itis also found that an airfoil can get thrust from a wave-disturbed airflow and thus the total dragis reduced. And the relationship among the thrust, the flying altitude, the flying speed and thewave parameters was worked out and discussed.
