Perspectives and Development of Electrical Systems in More Electric Aircraft

Arabul, Ahmet Yiğit; Kurt, Emre; Arabul, Fatma Keskin; Şenol, İbrahim; Schrötter, Martin; Bréda, Róbert; Megyesi, D.

doi:10.1155/2021/5519842

Cited by 17 publications

(4 citation statements)

References 150 publications

(165 reference statements)

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“…By increasing the temperature of the deposition from 800 to 950 °C, a tremendous increment in the Si content (from 1.7 to 21.5 atom %) was observed. In both samples (gSi 800°C , gSi 950°C ), the C 1s core-level spectra were deconvoluted using the sp 2 , sp 3 , and C−O + C�O, COOH, 40 and C−Si bonds (Table 3). The C−Si contents were estimated as 3 and 8.7% for gSi 800°C and gSi 950°C samples, respectively, which was in good agreement with the higher Si atomic percentage observed for gSi 950°C .…”

Section: Resultsmentioning

confidence: 99%

“…In the aircraft industry, there is a drive toward the concept of hybrid electric-powered or more-electric aircraft (MEA) and eventually of an all-electric aircraft. − This increased tendency for the amplified usage of electrical power on aircraft emanates from the need to enhance the overall aircraft efficiency, decrease fuel consumption, and thus reduce emissions of greenhouse gases. , Coupled with this need, there is a rising trend for the use of carbon fiber-reinforced polymer (CFRP) composites due to their superior mechanical characteristics and lightweight nature …”

Section: Introductionmentioning

confidence: 99%

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Improving the Through-Thickness Thermal Conductivity of Carbon Fiber/Epoxy Laminates by Direct Growth of SiC/Graphene Heterostructures on Carbon Fibers

et al. 2023

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Poor thermal conductivity in the through-thickness direction is a critical limitation in the performance of carbon fiberreinforced polymer (CFRP) composites over a broad range of applications in the aviation industry, where heat dissipation is required (e.g., battery packs, electronic housing, and heat spreaders). In this work, it is demonstrated for the first time that a hierarchical network of vertically oriented graphene nanoflakes (GNFs), with nanoconfined silicon carbide (SiC) nanocrystals, self-assembled on carbon fibers (CFs) can provide significant improvement to the thermal conductivity (TC) of CFRPs in the through-thickness direction. The vertically aligned SiC/GNF heterostructures were grown directly on CFs for the first time by single-step plasmaenhanced chemical vapor deposition (PECVD) employing tetramethylsilane (TMS) and methane (CH 4 ) gases at temperatures of 800 and 950 °C. At the deposition temperature of 950 °C, the controlled introduction of SiC/GNF heterostructures induced a 56% improvement in through-thickness TC over the bare CFRP counterparts while simultaneously preserving the tensile strength. The increase in thermal conductivity is accomplished by SiC nanocrystals, which serve as linkage thermal conducting paths between the vertical graphene layers, further enhancing the smooth transmission of phonons in the vertical direction. The work demonstrates for the first time the unique potential of novel SiC/GNF heterostructures for attaining strong and thermally conductive multifunctional CFRPs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improving the Through-Thickness Thermal Conductivity of Carbon Fiber/Epoxy Laminates by Direct Growth of SiC/Graphene Heterostructures on Carbon Fibers

et al. 2023

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“…One of the essential operational characteristics of electric aircraft machines is reliability [6][7][8][9][10]. A fully superconducting electrical machine based on the second generation HTS tapes [11,12], Engineering created at the moment in the world, did not pass the service life tests.…”

Section: Methodsmentioning

confidence: 99%

Development of fully superconducting 5 MW aviation generator with liquid hydrogen cooling

Dezhin

Ilyasov

2022

Eureka: PE

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The use of liquid hydrogen as a fuel will be inevitable in the aviation of the future. This statement means that manufacturers will also implement liquid hydrogen for cooling all superconducting aviation equipment of an electric propulsion system. The development of fully electric aircraft is the most promising solution in this case. Scientists from the Department of electrical machines and power electronics of Moscow aviation institute have conducted calculations and theoretical researches of critical specific mass-dimensional parameters (MW/ton and MW/m3 at 21 K) of fully superconducting aviation synchronous generator of the electric propulsion system. The results are in this article. The article discusses the results 3D finite element modeling (FEM) simulation of a 5 MW fully superconducting synchronous generator with combined excitation. Superconducting armature and axial excitation windings based on second generation high temperature superconductors (HTS-2G) are located on the stator, which makes it possible to contactlessness and the absence of sliding seals. A dry gap will reduce gas-dynamic losses and increase the nominal peripheral speed of the rotor. The use of liquid hydrogen as a coolant makes it possible to significantly increase the linear load of the generator, and high current densities to reduce the cross-sectional area of the coils, which will make it possible to place them in individual cryostats in the future. Individual cryostats will allow to remove the heat release of magnetic losses from the cryogenic zone and reduce the consumption of refrigerant. For the purpose of internal redundancy of the HTS coils, the machine has a complete set of reserve winding made of ultrapure aluminum, also cooled by liquid hydrogen. If the superconducting coils get out of the stand, the generator will provide 15 % power on standby

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“…This type of generators have advantages such as being able to provide higher power levels and are lightweight by reducing the number of cables by having a voltage of 120 VAC, and the voltage change can be done more easily thanks to the use of transformers, despite this, it has disadvantages such as its frequency instability so additional units are needed to control it as is the Constant Speed Driver or hydromechanical systems that have evolved over time, and this is where More Electric Aircraft (MEA) enters (Arabul, et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Electrical system simulation of an aircraft through ANSYS Electronics Desktop

Regalado-Rangel

Gastellum-Michel

Torres-Rivera

et al. 2022

JOES

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More Electric Aircraft is a new technology that allows the aeronautical sector to innovate in the electrical part when it comes to implementing it, that is, it consists of replacing part of the current pneumatic, hydraulic and mechanical systems that make up an aircraft, with electrical systems, for this reason, the main purpose is to design and develop a simulation model in ANSYS Electronics Desktop of the Boeing 777 architecture to analyze all the parameters such as: the voltage, current and power of each subsystem, so for the development, they are simulated one by one and later, they are joined based on the electrical diagram of the aircraft in order to be able to test them in normal and abnormal conditions, and make the comparison of when they are simulated individually, in this way, it creates an impact when rebuilding the electrical system, generating advantages that benefit those companies in this sector for the contribution of their innovations.

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Perspectives and Development of Electrical Systems in More Electric Aircraft

Cited by 17 publications

References 150 publications

Improving the Through-Thickness Thermal Conductivity of Carbon Fiber/Epoxy Laminates by Direct Growth of SiC/Graphene Heterostructures on Carbon Fibers

Improving the Through-Thickness Thermal Conductivity of Carbon Fiber/Epoxy Laminates by Direct Growth of SiC/Graphene Heterostructures on Carbon Fibers

Development of fully superconducting 5 MW aviation generator with liquid hydrogen cooling

Electrical system simulation of an aircraft through ANSYS Electronics Desktop

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