Industrial partners anticipate that numerical simulation requirements will strongly increase, possibly by an order of magnitude. Therefore, it is vital to reduce the computation times of simulation tools, particularly for aerodynamics, by relying on software architectures that are efficient in heterogeneous and flexible HPC environments in order to integrate new numerical models. In this context, Airbus, DLR and ONERA launched at the beginning of 2018 the development of the new generation CFD code CODA [1] to overcome the limits of current CFD tools. CODA is faster, more automatic and able of simulating complex aerodynamic [2] or multiphysics flows. It integrates classical Finite Volume (FV) methods as well as new Discontinuous Galerkin (DG) methods that have been investigated for non-linear CFD [3] for nearly two decades. We will present the work carried out recently by ONERA during two collaborative projects: LAMA in a national framework, and NextSIM in a European framework (leaded by BSC). More specifically, we will present new developments on high-precision adaptive DG methods for improving the quality of physical results. We will also show Reynolds-Averaged Navier-Stokes simulations leveraging efficient implicit resolution methods thanks to new developments on linear algebra preconditioning [4], as well as on multigrid methods. REFERENCES [1] Görtz Stefan, Leicht Tobias, Couaillier Vincent, Méheut Michael, Larrieu Pascal, Champagneux Steeve, CODA: A European Perspective for a Next-Generation CFD, Analysis and Design Platform. NATO AVT-366 Workshop on Use of Computational Fluid Dynamics for Design and Analysis: Bridging the gap between Industry and Developers, 2022. [2] Volpiani P.S., Chapelier, J. B., Schwöppe, A., Jägersküpper, J., & Champagneux, S. (2023). Simulating the Common Research Model using the new CFD software from ONERA, DLR and Airbus. In AIAA AVIATION 2023 Forum (p. 3275). [3] Renac Florent, Entropy stable, robust and high-order DGSEM for the compressible multicomponent Euler equations. Journal of Computational Physics, 445 (2021), 110584. [4] Jadoui Mehdi, Blondeau Christophe, Martin Emeric, Renac Florent, Roux François-Xavier, Comparative study of inner–outer Krylov solvers for linear systems in structured and high-order unstructured CFD problems. Computers & Fluids, Volume 244, 15 August 2022, 105575.