Numerical Investigation of a Fuselage Boundary Layer Ingestion Propulsion Concept
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 poten...
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Published in | NASA Center for AeroSpace Information (CASI). Conference Proceedings |
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Main Authors | , , , |
Format | Conference Proceeding |
Language | English |
Published |
Hampton
NASA/Langley Research Center
12.08.2013
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Subjects | |
Online Access | Get full text |
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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. |
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AbstractList | 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. |
Author | Campbell, Richard L Guynn, Mark D Fredericks, William J Elmiligui, Alaa A |
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Copyright | Copyright NASA/Langley Research Center Aug 12, 2013 |
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SubjectTerms | Airframes Airships Boundary layers Computer simulation Configuration management Configurations Drag Fuselages Ingestion Numerical analysis Propulsion systems Sensitivity analysis Wind tunnels |
Title | Numerical Investigation of a Fuselage Boundary Layer Ingestion Propulsion Concept |
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