Blended Wing Body with Boundary layer Ingestion Conceptual Design in a Multidisciplinary Design Analysis Optimization Environment

Gao, Ziang; Smith, Howard

doi:10.2514/6.2020-1955

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…Gao and Smith [71] presented a multidisciplinary aircraft design and analysis environment called GENUS in their work and demonstrated its capabilities by assessing a BLI HWB aircraft. Within this environment the geometry definition and mission profile were included.…”

Section: Other Relevant Researchmentioning

confidence: 99%

Recent Advances in Boundary Layer Ingestion Technology of Evolving Powertrain Systems

2022

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The increasing environmental concern during the last years is driving the research community towards reducing aviation’s environmental impact. Several strict goals set by various aviation organizations shifted the research focus towards more efficient and environmentally friendly aircraft concepts. Boundary Layer Ingestion (BLI) is currently investigated as a potential technology to achieve different design goals such as energy efficiency improvement and noise emission reductions in the next generation of commercial aircraft. The technology principle is to place the propulsive unit within the boundary layer generated by the airframe body. Although several studies showed its theoretical benefits, a multidisciplinary nature is introduced in the design phase. This imposes new challenges on the current design tools. An increasing number of publications are focusing on assessing this technology while taking into account interlinks between different disciplines. The goal of this work is to review the current state-of-the-art of BLI evaluation studies. Particular focus is given to the underlying assumptions of each work, the methodology employed, and the level of fidelity of the tools used. By organizing the available work in a comprehensive manner, the up-to-date results are interpreted. The current trends and trade-offs emerging from studies are presented. Through reviewing the ongoing published work, the next steps for further development of the methods that will assess this technology are derived.

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Section: Other Relevant Researchmentioning

confidence: 99%

Recent Advances in Boundary Layer Ingestion Technology of Evolving Powertrain Systems

2022

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“…Gao and Smith [103] proposed the GENUS multidisciplinary aircraft design environment, composed by modules for geometry, mission and engine properties. In particular, the BLI module was based on XFOIL and a PC model.…”

Section: Accepted Manuscript N O T C O P Y E D I T E Dmentioning

confidence: 99%

Boundary Layer Ingestion Propulsion: A Review on Numerical Modeling

Menegozzo

Benini

2020

Journal of Engineering for Gas Turbines and Power

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The present paper focuses on the numerical modelling approaches adopted in Boundary Layer Ingestion (BLI) studies. Three driving aircraft concepts have been identified, namely Propulsive Fuselage Concept, Rear Engines Concept and Distributed Fans Concept. The affiliation to relevant research projects has been considered. Specifically, EU DisPURSAL, EU CENTRELINE, NASA STARC-ABL, NASA D8, ONERA NOVA, NASA N3-X and ONERA DRAGON have been examined, as well as other works. The methodologies adopted by the reviewed analyses have been investigated and summarized for each concept, in order to assess the main trends of BLI modelling strategies.

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“…17,16,14,15,13 A common returning design choice for fixed-wing UAVs is the blended wing body (BWB): a more often than not tailless configuration with the fuselage, the aircraft's main body, integrated in the wing. 21,23,24,18,22,19,[25][26][27]20 The absence of a horizontal tailplane combined with profiles that have positive camber enforces the sweeping and twisting of the wing to obtain longitudinal static stability, the intrinsic desire of the airplane to correct minor changes in its angle of attack (α). 28,16,14,29 When swept backward, the sweeping of the wings introduces a pressure gradient on the wing normal to the free stream, decreasing from the root to the tip.…”

Section: Introductionmentioning

confidence: 99%

Design optimization-under-uncertainty of a forward swept wing unmanned aerial vehicle using SAMURAI

Wauters

2022

International Journal of Micro Air Vehicles

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In this paper the design optimization-under-uncertainty of a forward swept wing (FSW) blended wing body (BWB) unmanned aerial vehicle (UAV) is examined. Conventional BWBs are often tailless, which leads to a backward swept wing to ensure longitudinal static stability. This in turn can induce flow separation at the tip, leading to a loss of lift, controllability and the appearance of a nose-up pitching moment. A possible solution to this problem is a conceptual redesign by introducing a forward swept wing, which is inherently free of tip-stall, but needs a careful design in order to be controllable. However, fixed wing UAVs are often produced by means of direct injection expanded foam moulding, which is characterized by not negligible production tolerances. This lead to a reliability-based robust design optimization problem, for which a novel framework is employed: SAMURAI. Firstly, the method accounts for computational cost by means of surrogate modelling, an analytical treatment of the problem and an asynchronous updating scheme that balances design space exploration and objective exploitation. Secondly, the method treats the problem as a multi-objective problem, which leads to a Pareto front of robust and reliable designs. The result is a novel series of UAV designs that are inherently free of tip stall, perform robustly and meet the stability requirements with the target reliability obtained with a computationally feasible budget.

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Blended Wing Body with Boundary layer Ingestion Conceptual Design in a Multidisciplinary Design Analysis Optimization Environment

Cited by 3 publications

References 9 publications

Recent Advances in Boundary Layer Ingestion Technology of Evolving Powertrain Systems

Recent Advances in Boundary Layer Ingestion Technology of Evolving Powertrain Systems

Boundary Layer Ingestion Propulsion: A Review on Numerical Modeling

Design optimization-under-uncertainty of a forward swept wing unmanned aerial vehicle using SAMURAI

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