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Extension of analytical indicial aerodynamics to generic trapezoidal wings in subsonic flow

查看全文 作　　者：Andrea DA [1]RONCH;Antonino [1]VENTURA;Marcello [2]RIGHI;Matteo [3]FRANCIOLINI;Marco [4]BERCI;Daniel [1]KHARLAMOV 高影响力作者 机构地区：[1]Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1B J, UK;[2]School of Engineering, Zurich University of Applied Sciences, Winterthur 8401, Switzerland;[3]Dipartimento di Ingegneria Industriale e Seienze Matematiche, Universita Politecnica delle Marche, Ancona 1-60100, Italy;[4]School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, UK高影响力机构 出　　处：《Chinese Journal of Aeronautics》索引2018年第31卷第4期,共15页高影响力期刊 基　　金：the Royal Academy of Engineering for funding this research;the use of the IRIDIS High Performance Computing Facility, and associated support services at the University of Southampton, in the completion of this work 摘　　要：Analytical indicial aerodynamic functions are calculated for several trapezoidal wings in subsonic flow, with a Mach number 0.3 Ma 0.7. The formulation herein proposed extends wellknown aerodynamic theories, which are limited to thin aerofoils in incompressible flow, to generic trapezoidal wing planforms. Firstly, a thorough study is executed to assess the accuracy and limitation of analytical predictions, using unsteady results from two state-of-the-art computational fluid dynamics solvers as cross-validated benchmarks. Indicial functions are calculated for a step change in the angle of attack and for a sharp-edge gust, each for four wing configurations and three Mach numbers. Then, analytical and computational indicial responses are used to predict dynamic derivatives and the maximum lift coefficient following an encounter with a one-minus-cosine gust. It is found that the analytical results are in excellent agreement with the computational results for all test cases. In particular, the deviation of the analytical results from the computational results is within the scatter or uncertainty in the data arising from using two computational fluid dynamics solvers. This indicates the usefulness of the developed analytical theories. 关 键 词：气体动力学 翅膀 流动 通用 计算结果 SCATTER 空气动力学 液体动力学
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