The development of massively parallel computation, along with scalable numerical methods, provides the capacity to perform high-fidelity simulations on a time scale that has enabled incredible scientific breakthroughs in the last decade. In this presentation, the key features of our massively parallel CFD solver which enables simulations of complex flows on multi- billion unstructured finite element meshes will be presented. Then, the capacities of our solver will be illustrated with a series of numerical simulations on a realistic two-component wing profile in aeronautics with application to aerodynamics and flow control.