Numerical Simulation of Unsteady Aerodynamic Loads over an Aircraft

Xiao Jun Xiang; Yu Qian

doi:10.4028/www.scientific.net/AMR.908.264

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 908Numerical Simulation of Unsteady Aerodynamic Loads...

Numerical Simulation of Unsteady Aerodynamic Loads over an Aircraft

Abstract:

The unsteady aerodynamic loads are the basic of the aeroelastic. This paper focuses on the computation of the unsteady aerodynamic loads for forced periodic motions under different Mach numbers. The flow is modeled using the Euler equations and an unsteady time-domain solver is used for the computation of aerodynamic loads for forced periodic motions. The Euler equations are discretized on curvilinear multi-block body conforming girds using a cell-centred finite volume method. The implicit dual-time method proposed by Jameson is used for time-accurate calculations. Rigid body motions were treated by moving the mesh rigidly in response to the applied sinusoidal motion. For an aircraft model, a validation of the unsteady aerodynamics loads is first considered. Furthermore, a study for understanding the influence of different Mach number was conducted. A reverse of the trend of hysteretic loops can be observed with the increasing of the Mach number.

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Periodical:

Advanced Materials Research (Volume 908)

Pages:

264-268

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.908.264

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Online since:

March 2014

Authors:

Xiao Jun Xiang*, Yu Qian

Keywords:

Hysteresis Effect, Hysteresis Loop, Numerical Simulation, Unsteady Flow

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