System studies show that a N3-X hybrid wing-body aircraft with a turboelectric distributed propulsion system using a mail-slot inlet/nozzle nacelle can meet the environmental and performance goals for N+3 generation transports (three generations beyond the current air transport technology level) set by NASA's Subsonic Fixed Wing Project. In this study, a Navier-Stokes flow simulation of N3-X on hybrid unstructured meshes was conducted, including the mail-slot propulsor. The geometry of the mail-slot propulsor was generated by a CAD (Computer-Aided Design)-free shape parameterization. A novel body force model generation approach was suggested for a more realistic and efficient simulation of the flow turning, pressure rise and loss effects of the fan blades and the inlet-fan interactions. Flow simulation results of the N3-X demonstrates the validity of the present approach. An optimal Shape design of the mail-slot nacelle surface was conducted to reduce strength of shock waves and flow separations on the cowl surface.
Optimal Shape Design of Mail-Slot Nacelle on N3-X Hybrid Wing-Body Configuration
2013
22 pages
Report
Keine Angabe
Englisch
Algebra, Analysis, Geometry, & Mathematical Logic , Aircraft , Test Facilities & Equipment , Shapes , Computer aided design , Turbogenerators , Mass flow , Loads (forces) , Computational fluid dynamics , Slots , Nacelles , Blended-wing-body configurations , Fan blades , Inlet nozzles , Pressure effects , Electric propulsion , Simulation , Navier-stokes equation , Parameterization , Unstructured grids (mathematics) , Boundary layers , Mach number , Cowlings
Optimal Shape Design of Mail-Slot Nacelle on N3-X Hybrid Wing Body Configuration
British Library Conference Proceedings | 2013
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