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Overall eVTOL aircraft design for urban air mobility

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Green Energy and Intelligent Transportation 2024年第2期3卷 9-19页

作者： Jiechao Zhang Yaolong Liu Yao Zheng School of Aeronautics and Astronautics Zhejiang UniversityHangzhou 310027China

Electric vertical takeoff and landing(eVTOL)aircraft have emerged as a potential alternative to the existing transportation system,offering a transition from two-dimensional commuting and logistics to three-dimensional *** a groundbreaking innovation in both the automotive and aviation sectors,eVTOL holds significant promise but also presents notable *** paper aims to address the overall aircraft design(OAD)approach specifically tailored for eVTOL in the context of urban air mobility(UAM).In contrast to traditional OAD methods,this study introduces and integrates disciplinary methodologies specifically catered to eVTOL aircraft design.A case study is conducted on a tilt-duct eVTOL aircraft with a typical UAM mission,and the disciplinary performance,including initial sizing,aerodynamics,electric propulsion systems,stability and control,weight,mission analysis and noise,is examined using the OAD *** findings demonstrate that the current approach effectively evaluates the fundamental aircraft-level performance of eVTOL,albeit further high-fidelity disciplinary analysis and optimization methods are required for future MDO-based eVTOL overall aircraft design.

关键词： Electric vertical takeoff and landing urban air mobility Overall aircraft design Tilt-duct

The role of intelligent technology in the development of urban air mobility systems:A technical perspective

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Fundamental Research 2024年第5期4卷 1017-1024页

作者： Yang Liu Cheng Lyu Fan Bai Omkar Parishwad Ying Li Department of Architecture and Civil Engineering Chalmers University of TechnologyGothenburg SE-41296Sweden Chair of Transportation Systems Engineering Technical University of MunichMunich 80333Germany School of Information Engineering Chang'an UniversityXi'an 710010China

urban air mobility(UAM)is an emerging transportation system that aims at revolutionizing urban mobility through the deployment of small electric vertical takeoff and landing(eVTOL)*** development of UAM is largely driven by advances in Intelligent Technology(IT).This review article provides an overview of the UAM system and discusses the application of IT in *** challenges facing UAM are also identified,and an outlook on the future of this promising transportation system is *** main conclusions suggest that IT is a fundamental driver of UAM,enabling a range of applications such as air traffic management and autonomous drone ***,the UAM system is facing a number of challenges,including eVTOL technology,system integration issues,and noise *** these challenges,the future of UAM appears promising;as a disruptive transportation mode,UAM is expected to play an important role in addressing the growing demand of urban transportation in the coming decades.

关键词： urban air mobility Intelligent technology Artificial intelligence air traffic development Disruptive transportation mode

A demand forecasting model for urban air mobility in Chengdu,China

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Green Energy and Intelligent Transportation 2024年第3期3卷 11-23页

作者： Wenqiu Qu Jie Huang Chenglong Li Xiaohan Liao State Key Laboratory of Resources and Environment Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100101China Key Laboratory of Regional Sustainable Development Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Civil Aviation Flight University of China Guanghan618307China The Research Center for UAV Applications and Regulation CASBeijing 100101China

The successful application of new technologies such as remotely piloted aircraft systems,distributed electric propulsion systems,and automatic control systems on electric vertical take-off and landing(eVTOL)aircraft has prompted urban air mobility(UAM)to be mentioned *** is a newly raised transport mode of using eVTOL aircraft to transport people and cargo in urban areas,which is thought to share some of the traffic on the *** of the prerequisites for UAM to operate on a regular basis is that its demand can support the operating costs,so forecasting UAM demand is *** conduct UAM demand forecasting based on the four-step method,focusing on improving the third-step modal split,and propose a demand forecasting model based on the logit *** model combines a nested logit(NL)model with a multinomial logit(MNL)model to solve the problem of non-existent UAM sharing *** use Chengdu,China as an example,and focus on forecasting the UAM traffic demand in 2030 with the help of the four-step *** results show that UAM is suitable for shared operation during the early *** a fully shared operation,the UAM share rate increases by 0.73%for every kilometer increase in ***,UAM is more competitive than other modes for delivery distances exceeding 15 ***,using the distributions of the share rate and traffic flow pattern from the simulation,we propose the routes that can be prioritized for UAM operations in Chengdu.

关键词： urban air mobility Four-step method Demand forecasting Logit model Share rate

Reconstructing urban wind flows for urban air mobility using reduced-order data assimilation

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Theoretical & Applied Mechanics Letters 2023年第4期13卷 291-298页

作者： Mounir Chrit Department of Atmospheric Sciences University of North DakotaGrand Forks 58202-9006United States

Advancements in uncrewed aircrafts and communications technologies have led to a wave of interest and investment in unmanned aircraft systems(UASs)and urban air mobility(UAM)vehicles over the past *** support this emerging aviation application,concepts for UAS/UAM traffic management(UTM)systems have been *** characterizing and predicting the microscale weather conditions,winds in particular,will be critical to safe and efficient operations of the small UASs/UAM aircrafts within the *** study implements a reduced order data assimilation approach to reduce discrepancies between the predicted urban wind speed with computational fluid dynamics(CFD)Reynolds-averaged Navier Stokes(RANS)model with real-world,limited and sparse *** developed data assimilation system is *** observations are simulated using a large eddy simulation(LES).The data assimilation approach is based on the time-independent variational framework and uses space reduction to reduce the memory cost of the *** approach leads to error reduction throughout the simulated domain and the reconstructed field is different than the initial guess by ingesting wind speeds at sensor locations and hence taking into account flow unsteadiness in a time when only the mean flow quantities are *** locations where wind sensors can be installed are discussed in terms of their impact on the resulting wind *** is shown that near-wall locations,near turbulence generation areas with high wind speeds have the highest *** the model error with its principal mode provides a better agreement with the truth and the hazardous areas for UAS navigation increases by more than 10%as wind hazards resulting from buildings wakes are better simulated through this process.

关键词： urban air mobility Data Assimilation Computational Fluid Dynamics Principal Component Analysis Model Reduction Variational Data Assimilation

Exploring the Promises and Challenges of urban air mobility (UAM)

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Advances in Aerospace Science and Technology 2024年第3期9卷 75-84页

作者： Yusuf Karimli Aniello Daniele Marano Engineering Department Landau School Baku Azerbaijan Aerospace Engineering Department University of Federico II Naples Italy

This paper is focused on a higher-level report of a new generation of Unmanned Aerial Vehicle (UAV) technologies. Starting from the structural scalability of civil tiltrotors, design strategy and requirements for UAVs, and advanced composite materials, the increased speed and productivity requirements for tiltrotors have spawned several investigations associated with proprotor aero elastic stability augmentation and aerodynamic performance enhancements. The research emphasized the Large Civil Tilt Rotor as the configuration with the best potential to meet the technology goals, and the design, including the challenges of the Large Civil Tilt Rotor (LCTR). The design presented was economically competitive, with the potential for substantial impact on the air transportation system. The research includes some manufacturers of helicopters, drones and tiltrotors carrying out design studies and production of prototypes, as well as research projects aimed at designing, manufacturing, qualifying, and flight-testing the new wing of the Next-Generation Civil Tiltrotor Technology Demonstrator. Promises of Vertical Take-off and Landing (VTOL) aircraft, UAVs, Digitalization of urban air mobility (UAM), and the “U-space” concept are discussed in the paper. The eight SUMP principles and possibilities of future advancements are emphasized.

关键词： Thermodynamics Aerospace Innovations Sustainable Energy Systems Fluid Dynamics Aeronautical Engineering Green Technology Digital Development of Engineering urban air mobility