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Accession Number N14-0002450
Title Numerical Investigation of a Fuselage Boundary Layer Ingestion Propulsion Concept.
Publication Date Aug 2013
Media Count 20p
Personal Author A. A. Elmiligui M. D. Guynn R. L. Campbell W. J. Fredericks
Abstract In the present study, a numerical assessment of the performance of fuselage boundary layer ingestion (BLI) propulsion techniques was conducted. This study is an initial investigation into coupling the aerodynamics of the fuselage with a BLI propulsion system to determine if there is sufficient potential to warrant further investigation of this concept. Numerical simulations of flow around baseline, Boundary Layer Controlled (BLC), and propelled boundary layer controlled airships were performed. Computed results showed good agreement with wind tunnel data and previous numerical studies. Numerical simulations and sensitivity analysis were then conducted on four BLI configurations. The two design variables selected for the parametric study of the new configurations were the inlet area and the inlet to exit area ratio. Current results show that BLI propulsors may offer power savings of up to 85% over the baseline configuration. These interim results include the simplifying assumption that inlet ram drag is negligible and therefore likely overstate the reduction in power. It has been found that inlet ram drag is not negligible and should be included in future analysis.
Keywords Aerodynamics
Boundary layer control
Boundary layers
Computational fluid dynamics
Finite volume method
Grid generation(Mathematics)
Intake systems
Navier-stokes equation
Turbulence models
Unstructured grids(Mathematics)
Wind tunnel tests

Source Agency National Aeronautics and Space Administration
NTIS Subject Category 51A - Aerodynamics
46B - Fluid Mechanics
81D - Jet & Gas Turbine Engines
Corporate Author National Aeronautics and Space Administration, Hampton, VA. Langley Research Center.
Document Type Conference proceedings
Title Note N/A
NTIS Issue Number 1421
Contract Number N/A

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