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Performance of a Boundary Layer Ingesting (BLI) Propulsion System
45th AIAA Aerospace Sciences Meeting and Exhibit, 2007 This paper presents an assessment of the performance of an embedded propulsion system in the presence of distortion associated with boundary layer ingestion. For fan pressure ratios of interest for civil transports, the benefits of boundary layer ingestion are shown to be very sensitive to the magnitude of fan and duct losses.
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Aerodynamics of Boundary Layer Ingesting Fans
Volume 1A: Aircraft Engine; Fans and Blowers, 2014Boundary Layer Ingesting (BLI) turbofan engines could offer reduced fuel burn compared with podded engines, but the fan stage must be designed to run continuously with severe inlet distortion. This paper aims to explain the fluid dynamics and loss sources in BLI fans running at a cruise condition.
E. J. Gunn, C. A. Hall
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Benefits of Boundary Layer Ingestion Propulsion
53rd AIAA Aerospace Sciences Meeting, 2015This paper presents experimental measurements of propulsive power reduction due to boundary layer ingestion, for an electric ducted fan propulsor behind a NACA 0040 body of revolution at a Reynolds number of approximately 240,000. The propulsive power is defined as the electrical power required by the propulsor to obtain a zero net streamwise force on ...
Kevin M. Sabo, Mark Drela
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Design and Performance of a Boundary Layer Ingesting Fan
Volume 2A: Turbomachinery, 2020Abstract A Boundary Layer Ingesting fan is designed to function in a tail cone thruster configuration on an existing aircraft. This means that the fan ingests part of the boundary layer developing over the fuselage all around the circumference.
Martin Laban, Hans M\xe3\xa5Rtensson
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An analytical model for predicting rotor broadband noise due to turbulent boundary layer ingestion
Journal of Sound and Vibration, 2018 A semi-empirical analytical model is developed that predicts the noise produced by a rotor ingesting a boundary layer in proximity to a hard-wall. The rotor boundary layer ingestion noise source is an important source to include when a rotor is installed
David Angland
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Conceptual Fan Design for Boundary Layer Ingestion
Volume 2C: Turbomachinery, 2019Abstract Aircraft concepts using boundary layer ingestion (BLI) are promising future flight systems aiming at reduced mission fuel burn. In this scenario the fan operates at inhomogeneous inflow conditions around the circumference. The accurate calculation of the resulting flow phenomena using uRANS approaches is highly time-consuming ...
Mennicken, Maximilian +3 more
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Flow in Boundary Layer Ingesting Serpentine Inlets
47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2011Boundary-layer-ingesting serpentine inlets produce distorted profiles that can cause aeromechanical, stability, and performance changes in embedded engines. Proper design of embedded engine systems requires understanding of the underlying fluid dynamics that occur within serpentine inlets.
Anthony Ferrar, Walter O'Brien
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Acoustics of rotor ingesting an axisymmetric turbulent boundary layer
The Journal of the Acoustical Society of America, 2021The noise generation by a five-bladed rotor ingesting an axisymmetric turbulent boundary layer at the tail end of a body of revolution (BOR) is investigated numerically at Reynolds number of 1.9 × 106 based on the BOR length and free-stream Mach number of 0.059.
Meng Wang, Di Zhou, Kan Wang
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Aeromechanical Response of a Distortion Tolerant Boundary Layer Ingesting Fan
Volume 7C: Structures and Dynamics, 2018Boundary Layer Ingestion (BLI) is a propulsion technology being investigated at NASA by the Advanced Aircraft Transportation Technology (AATT) Program to facilitate a substantial reduction in aircraft fuel burn. In an attempt to experimentally demonstrate an increase in propulsive efficiency of a BLI engine, a first-of-its-kind sub-scale high-bypass ...
Andrew J. Provenza +2 more
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Opportunities and challenges for distributed propulsion and boundary layer ingestion
Aircraft Engineering and Aerospace Technology, 2014Purpose – The performance benefits of boundary layer ingestion (BLI) in the case of air vehicles powered by distributed propulsors have been documented and explored extensively by numerous studies. Therefore, it is well known that increased inlet flow distortion due to BLI can dramatically reduce these benefits.
P. Laskaridis, V. Pachidis, P. Pilidis
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