Computational investigation of a boundary-layer ingesting propulsion system for the common research model

Brennan T. Blumenthal, Alaa A. Elmiligui, Karl A. Geiselhart, Richard L. Campbell, Mark David Maughmer, Sven Schmitz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

The present paper examines potential propulsive and aerodynamic benefits of integrating a Boundary-Layer Ingestion (BLI) propulsion system into a typical commercial aircraft using the Common Research Model (CRM) geometry and the NASA Tetrahedral Unstructured Software System (TetrUSS). The Numerical Propulsion System Simulation (NPSS) environment is used to generate engine conditions for CFD analysis. Improvements to the BLI geometry are made using the Constrained Direct Iterative Surface Curvature (CDISC) design method. Previous studies have shown reductions of up to 25% in terms of propulsive power required for cruise for other axisymmetric geometries using the BLI concept. An analysis of engine power requirements, drag, and lift coefficients using the baseline and BLI geometries coupled with the NPSS model are shown. Potential benefits of the BLI system relating to cruise propulsive power are quantified using a power balance method, and a comparison to the baseline case is made. Iterations of the BLI geometric design are shown and any improvements between subsequent BLI designs presented. Simulations are conducted for a cruise flight condition of Mach 0.85 at an altitude of 38,500 feet and an angle of attack of 2° for all geometries. A comparison between available wind tunnel data, previous computational results, and the original CRM model is presented for model verification purposes along with full results for BLI power savings. Results indicate a 14.4% reduction in engine power requirements at cruise for the BLI configuration over the baseline geometry. Minor shaping of the aft portion of the fuselage using CDISC has been shown to increase the benefit from Boundary-Layer Ingestion further, resulting in a 15.6% reduction in power requirements for cruise as well as a drag reduction of approximately eighteen counts over the baseline geometry.

Original languageEnglish (US)
Title of host publication46th AIAA Fluid Dynamics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624104367
StatePublished - Jan 1 2016
Event46th AIAA Fluid Dynamics Conference, 2016 - Washington, United States
Duration: Jun 13 2016Jun 17 2016

Publication series

Name46th AIAA Fluid Dynamics Conference

Other

Other46th AIAA Fluid Dynamics Conference, 2016
CountryUnited States
CityWashington
Period6/13/166/17/16

Fingerprint

Propulsion
Boundary layers
Geometry
Engines
Drag reduction
Fuselages
Angle of attack
Mach number
Wind tunnels
Drag
NASA
Aerodynamics
Computational fluid dynamics
Aircraft

All Science Journal Classification (ASJC) codes

  • Engineering (miscellaneous)
  • Aerospace Engineering

Cite this

Blumenthal, B. T., Elmiligui, A. A., Geiselhart, K. A., Campbell, R. L., Maughmer, M. D., & Schmitz, S. (2016). Computational investigation of a boundary-layer ingesting propulsion system for the common research model. In 46th AIAA Fluid Dynamics Conference (46th AIAA Fluid Dynamics Conference). American Institute of Aeronautics and Astronautics Inc, AIAA.
Blumenthal, Brennan T. ; Elmiligui, Alaa A. ; Geiselhart, Karl A. ; Campbell, Richard L. ; Maughmer, Mark David ; Schmitz, Sven. / Computational investigation of a boundary-layer ingesting propulsion system for the common research model. 46th AIAA Fluid Dynamics Conference. American Institute of Aeronautics and Astronautics Inc, AIAA, 2016. (46th AIAA Fluid Dynamics Conference).
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abstract = "The present paper examines potential propulsive and aerodynamic benefits of integrating a Boundary-Layer Ingestion (BLI) propulsion system into a typical commercial aircraft using the Common Research Model (CRM) geometry and the NASA Tetrahedral Unstructured Software System (TetrUSS). The Numerical Propulsion System Simulation (NPSS) environment is used to generate engine conditions for CFD analysis. Improvements to the BLI geometry are made using the Constrained Direct Iterative Surface Curvature (CDISC) design method. Previous studies have shown reductions of up to 25{\%} in terms of propulsive power required for cruise for other axisymmetric geometries using the BLI concept. An analysis of engine power requirements, drag, and lift coefficients using the baseline and BLI geometries coupled with the NPSS model are shown. Potential benefits of the BLI system relating to cruise propulsive power are quantified using a power balance method, and a comparison to the baseline case is made. Iterations of the BLI geometric design are shown and any improvements between subsequent BLI designs presented. Simulations are conducted for a cruise flight condition of Mach 0.85 at an altitude of 38,500 feet and an angle of attack of 2° for all geometries. A comparison between available wind tunnel data, previous computational results, and the original CRM model is presented for model verification purposes along with full results for BLI power savings. Results indicate a 14.4{\%} reduction in engine power requirements at cruise for the BLI configuration over the baseline geometry. Minor shaping of the aft portion of the fuselage using CDISC has been shown to increase the benefit from Boundary-Layer Ingestion further, resulting in a 15.6{\%} reduction in power requirements for cruise as well as a drag reduction of approximately eighteen counts over the baseline geometry.",
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Blumenthal, BT, Elmiligui, AA, Geiselhart, KA, Campbell, RL, Maughmer, MD & Schmitz, S 2016, Computational investigation of a boundary-layer ingesting propulsion system for the common research model. in 46th AIAA Fluid Dynamics Conference. 46th AIAA Fluid Dynamics Conference, American Institute of Aeronautics and Astronautics Inc, AIAA, 46th AIAA Fluid Dynamics Conference, 2016, Washington, United States, 6/13/16.

Computational investigation of a boundary-layer ingesting propulsion system for the common research model. / Blumenthal, Brennan T.; Elmiligui, Alaa A.; Geiselhart, Karl A.; Campbell, Richard L.; Maughmer, Mark David; Schmitz, Sven.

46th AIAA Fluid Dynamics Conference. American Institute of Aeronautics and Astronautics Inc, AIAA, 2016. (46th AIAA Fluid Dynamics Conference).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Blumenthal BT, Elmiligui AA, Geiselhart KA, Campbell RL, Maughmer MD, Schmitz S. Computational investigation of a boundary-layer ingesting propulsion system for the common research model. In 46th AIAA Fluid Dynamics Conference. American Institute of Aeronautics and Astronautics Inc, AIAA. 2016. (46th AIAA Fluid Dynamics Conference).