Flutter Boundary Prediction of a Two Dimensional Airfoil in Transonic Flight Regime with the Preset Angles of AttackGuozhu Gao, Junqiang Bai, Guojun Li, Nan Liu and Yufei LiJNWPU, 36 2 (2018) 229-237DOI: https://doi.org/10.1051/jnwpu/20183620229