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Conceptual Design Methods Hybrid-Electric Transport Aircraft

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Conceptual Design Methods Hybrid-Electric Transport Aircraft ( conceptual-design-methods-hybrid-electric-transport-aircraft )

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x 3.15 3.16 3.17 3.18 3.19 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12 5.13 5.14 5.15 5.16 5.17 5.18 List of Figures Normalized power characteristics of a generic turbo-engine in ISA condition . 33 Efficiency contour characteristics of a generic turbo-engine at ISA, FL 350 and M0.78........................................ 33 Generic design and efficiency chart of a conventional electric motor . . . . . . 34 Part-load power of the electric motor and relative corrected ducted fan speed versusmissiontime................................. 50 BatterySOCprofileversusmissiontime..................... 53 Electricpropulsionsystem............................. 67 Layoutoftheall-electricpowersystemarchitecture. . . . . . . . . Design chart for hybrid-electric propulsion system in cruise . . . . Sensitivitystudyagainstbatteryspecificenergy. . . . . . . . . . . Design chart hybrid-electric propulsion system in climb and cruise . . . . . . 68 . . . . . . 71 . . . . . . 72 ...... 73 Altitude and speed sensitivity of relative SAR for a gross-weight at 98% of MTOW....................................... 77 Altitude and speed sensitivity of relative ESAR for a gross-weight at 98% of MTOW....................................... 77 Altitude and speed sensitivity of relative COSAR for a gross-weight at 98% of MTOWandaspecificelectricitypriceof0.07USD/kWh. . . . . . . . . . . . 77 Altitude and speed sensitivity of relative COSAR for a gross-weight at 98% of MTOWandaspecificelectricitypriceof0.16USD/kWh. . . . . . . . . . . . 77 Optimum speed sensitivity versus gross-weight according to SAR, ESAR and toCOSARatanaltitudeof35000ft....................... 78 Optimum speed sensitivity versus gross-weight according to SAR, COSAR and minimumcostatanaltitudeof35000ft ..................... 79 Relative change in block fuel versus relative change in block ESAR for a degree- of-hybridization for useful power (𝐻𝑃 𝑒𝑠𝑒) of 50% during cruise . . . . . . . . . 81 RelativechangeinMTOWfora𝐻𝑃𝑒𝑠𝑒 of50%duringcruise. . . . . . . . . . 81 RelativechangeinESARfora𝐻𝑃𝑒𝑠𝑒 of50%duringcruise . . . . . . . . . . 82 Relative change in block fuel versus π»πΈπ‘π‘™π‘œπ‘π‘˜. Geared-turbofan cruise throttling. 89 Relative change in block ESAR versus π»πΈπ‘π‘™π‘œπ‘π‘˜. Geared-turbofan cruise throt- tling.......................................... 90 Relative change in MTOW versus π»πΈπ‘π‘™π‘œπ‘π‘˜. Geared-turbofan cruise throttling. 90 Point performance analysis at cruise start (ISA+10Β°C, FL 350, M 0.76) for a design range of 1300 nm. Geared-turbofan cruise throttling. . . . . . . . . . . 91

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