Modern aircraft require intake and nozzle flows to be closely integrated with the airframe, and various layouts are possible. In some cases, the intake/nozzle is integral with the fuselage providing a relatively 'compact' layout. This contrasts with configurations in which the nacelles are displaced from the fuselage but are near lifting surfaces. Engine intake flow conditions may range from very high Mass Flow Ratio (MFR) at take-off, to very low MFR on approach, and may include zero MFR during inflight shut-downs. The effect of the intake flows on adjacent components will vary with intake MFR, aircraft attitude, and Mach number. Designers need to know the magnitude of these effects to ensure that they can be contained to satisfactory levels within the available control parameters. A first-order panel method was used to analyze the MFR effects on several configurations. These range from simple 'generic' types to complex, Canard-Delta configurations and include various intake and nozzle arrangements. Mach number and asymmetric effects were studied in particular cases.
Application of Subsonic First-Order Panel Methods for Prediction of Inlet and Nozzle Aerodynamic Interactions with Airframe
1992
16 pages
Report
Keine Angabe
Englisch
Aerodynamics , Aircraft , Aerodynamic configurations , Engine airframe integration , Engine inlets , Inlet nozzles , Panel method (Fluid dynamics) , Subsonic flow , Wing nacelle configurations , Mass flow , Asymmetry , Computational fluid dynamics , Fuselages , Mach number , Nozzle flow , Propulsion system configurations , Foreign technology
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