A Framework For Numerical Flow Simulation Of The Rotor Blade With Aeroelastic Deformation Using The Model Deformation Measurement Data

Abstract

Coupled CFD/CSD methods are widely used for the efficient development of rotorcraft incorporating aeroelasticity, but validation with wind tunnel testing has revealed significant discrepancies between these coupled simulations and experiments. These discrepancies may arise from uncertainties in the CFD and/or CSD components. However, it is difficult to identify the exact cause of these discrepancies solely through coupled simulations. In this study, we developed a numerical method to account for aeroelastic deformation using model deformation measurement (MDM) data, without relying on structural properties. We outlined a method for reconstructing the deformed shape of rotor blades using MDM data and demonstrated its effectiveness with data obtained from wind tunnel tests. The reconstructed shape was highly accurate, with errors of less than 0.3 mm. CFD simulations were subsequently conducted using the deformations obtained through the developed method, revealing differences in time-averaged aerodynamic loads and vibration behavior depending on whether elastic deformation was accounted for or not.