FLUTTER WIND TUNNEL TESTS FOR A REGIONAL AIRCRAFT

摘要

This paper presents an overview of flutter wind tunnel tests for a regional aircraft named Mitsubishi Regional Jet (MRJ), which is now under development by Mitsubishi Aircraft Corporation. Two flutter wind tunnel tests were conducted in High-Speed Wind Tunnel (HSWT) at Nagoya Aerospace Systems, Mitsubishi Heavy Industries, Ltd. (MHI) to validate flutter analysis method used for MRJ flutter evaluation and qualitatively confirm flutter characteristics of MRJ. One is a wing flutter model test using a wing-pylon-nacelle configuration model and another is a horizontal tail flutter model test using a horizontal tail model with an elevator. Both flutter model tests were successfully conducted at the HSWT and flutter boundaries were identified. Both flutter test results showed good agreement with analytical predictions on flutter speeds, critical flutter modes and flutter trends with respect to Mach number. The analytical predictions were obtained by MSC.NASTRAN with an aerodynamic correction based on Computational Fluid Dynamics (CFD) analysis and a CFD-based dynamic aeroelastic analysis.