Aerodynamic and Aeroacoustic Investigation for the Operation Arrangement of Contra-rotating Rotors

Li, Pengyu; Yang, Yannian; Zhang, Haoyu; Liu, Yu; Chen, Xuanwu; Li, Qingxi

doi:10.2514/6.2023-1011

Cited by 3 publications

(1 citation statement)

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“…The interference factor versus thrust ratio, i.e., Equation (39), is shown in Figure 5, and it should be aware that a lo in Equation (39) equals T lo /T up in Figure 5. If the lower rotor thrust is a typical value at 80% [34] of the upper rotor, the power of the contra system is 27% higher than that of the two isolated rotors. The worst case is that the two rotors have approximately the same thrust, with a power consumption that is 28% larger than the two isolated rotors.…”

Section: The Effect Of Thrust Ratio On Coaxial Rotor Interactionmentioning

confidence: 99%

Sizing of Multicopter Air Taxis—Weight, Endurance, and Range

Yang,

Liang,

Pröbsting

et al. 2024

Aerospace

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In the near future, urban air mobility (UAM) will let an old dream of human society come true: affordable and fast air transportation for almost everyone. Among the various existing designs, the multicopter configuration best combines the advantages of compactness, simplicity, and maturity. These aspects are important for actual use, particularly during the early stage of this market. This study elaborates on the design principles of UAM multicopters by examining existing models in terms of their configuration, weight, and range specifications. In particular, the weights of the different components are estimated based on empirical models, aerodynamic fundamentals for the analysis of UAM multicopters are derived from momentum theory, and the power and energy requirements for hovering and cruise flight are evaluated, thereby enabling estimation of the maximum hovering time and flight range. Finally, a sizing method is introduced and validated against an actual UAM design.

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Section: The Effect Of Thrust Ratio On Coaxial Rotor Interactionmentioning

confidence: 99%