FLIGHT SIMULATION AND MODELING OF A JET AIRCRAFT WITH SHIP AIRWAKE COMPUTATIONAL FLUID DYNAMICS DATABASE

Date

2025-8-27

Author

Özbudak, Kadir Can

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In this thesis, the flight simulation and modeling of a jet aircraft are investigated with a CFD-generated ship airwake database. The unsteady ship airwake database for an aircraft carrier is obtained by performing Computational Fluid Dynamics (CFD) simulations of a generic carrier model. A jet aircraft six-degree-of-freedom simulation model is coupled with a gust dynamic interface model using the ship airwake database. Different flow conditions, such as headwind and crosswind conditions for the carrier airwake, are used in the flight simulations. In the CFD simulations, the unstructured grid is generated for the asymmetric carrier geometry with sharp edges, and the Reynolds-Averaged Navier-Stokes equations and Spalart-Allmaras turbulence model are used to compute flow around the carrier. By post-processing CFD results, the flow velocity field in a smaller part of the computational domain over the carrier is extracted and used for the flight simulations as a database table. The database table is integrated into the simulation model as the gust velocity input by using the aircraft's position relative to the carrier and time as inputs. F-16 is used as a nonlinear jet aircraft model in the flight simulations. The simulations are done with trimmed flight conditions such as cruise, climb, and descent into fly-by maneuver, with and without the ship airwake. The flight operations over the carrier are tested with headwind and crosswind conditions. Complex interactions are observed in the simulations, especially for the +30 degree yaw wind condition with superstructure wake effect over the deck.

Subject Keywords

Jet Aircraft, Flight Simulation, Ship Airwake, Computational Fluid Dynamics (CFD), Dynamic Interface

URI

https://hdl.handle.net/11511/116168

Collections

Graduate School of Natural and Applied Sciences, Thesis