A Fast Correction Method of Model Deformation Effects in Wind Tunnel Tests

Abstract

The influence of model deformation needs to be corrected before the aerodynamic force data measured in the wind tunnel is applied to aircraft design. In order to obtain the aerodynamic forces on rigid model shape, this paper presents a fast correction method by establishing a mathematical modelling method connecting aerodynamic forces and wing section torsion. The aerodynamic force coefficients on rigid model shape can then be calculated quickly just by setting section torsion to zero. A 25-point simulation dataset of the High Reynolds Number Aero-Structural Dynamics (HIRENASD) model generated by Computational Fluid Dynamics (CFD) and Static Computational Aeroelasticity (CAE) approach is used to investigate the influence of section locations, basis function type, support radius, and deformation perturbation on the prediction accuracy. Finally, the present correction method is applied to predict the aerodynamic forces on the rigid shape of a NASA common research model. The results of parametric analysis and application show that the present correction method with the Wendland's C6 function and a support radius of 1.0 can provide a reasonable prediction of aerodynamic forces on the rigid model shape.

Creation of recombination corrective algorithm for research of a wind tunnel parameters

“…The modern aerodynamic experiment provides a large range of measurements of the flow parameters of the gas flowing around the model [8][9][10][11]. The main types of measurements in wind tunnels are related to the study of the flow around physical bodies and the definition of their aerodynamic characteristics [12]. The other measurements are related to the definition of the wind stream parameters.…”

Special Issue: Aeroelasticity

“…Grauer et al [8] presented the system identification from measured flight test data conducted using the X-56A aeroelastic demonstrator to identify a longitudinal flight dynamics model that included the short period, first symmetric wing bending and first symmetric wing torsion modes. Sun et al [9] dealt with the problem of correcting measured wind tunnel data from aeroelastic deformations, and demonstrated the methodology on the High Reynolds Number Aero-Structural Dynamics wing model.…”