Takeoff Simulation of Lift plus Cruise Air Taxi by Using Navier-Stokes Equations

Takeoff trajectory computations are made for a typical lift+cruise small transport aircraft suitable for an urban air taxi. The selected wing-body model consists of lifting and pushing propellers. Flow is modeled using the Navier-Stokes equations. A procedure is developed to embed the trajectory motion equations in an overset grid topology along with rotating blades. Results are validated with lifting line theory computations. A typical takeoff scenario is demonstrated by time-accurately integrating trajectory equations with the flow equations. The present work extends the capabilities of the current Navier-Stokes solvers to simulate trajectory motions of urban air taxi configurations.