Coupled Vertical/Short Takeoff and Landing (VSTOL) Down Wash-Ground Effect and Ship Air Wake Turbulent Flow Simulation Model

"Shipboard landings of JSF, AV-8B and Bell-Boeing's V22 have identified unique dynamicinterface issues and the critical need for an accurate and efficient technique forsimulating wind-over-deck situations. In this research, a novel approach is proposedwherein the flowfield of the ship, its superstructure and the complete aircraft aresolved using a coupled viscous flow solver for various relative wind speeds anddirections. The engine of the innovation, RotUNS, is a comprehensive CFD tool formulti-body-rotor flow simulation. It consists of a cartesian, unstructured, viscous,unsteady solver for the flow and a momentum source representation for the rotors.RotUNS generates the cartesian unstructured grid efficiently from the geometrydefinition and will be suitable for dynamic adaption to the turbulent flow field.The entire computational domain will be solved simultaneously to yield theinteracting flow field and the loads on the body. The simulation tool developed under this initiative will find wide usage inthe Navy reserach organizations and rotorcraft industry. The proposal offers todevelop a tool that will lay the foundations for true coupled flow field andload calculation of a complete configuration such as JSF, AV-8B and V-22 in amulti-body interfering environment as would be on an aircraft carrier.Sukra Helitek's software, RotUNS, is currently used for shipboard simulationof V-22. The proposed research has resulted from the direct kn