Ye Yuan

Ye Yuan
Swansea University | SWAN · Department of Aerospace Engineering

Doctor of Engineering

About

22
Publications
2,497
Reads
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91
Citations
Citations since 2017
20 Research Items
90 Citations
201720182019202020212022202305101520253035
201720182019202020212022202305101520253035
201720182019202020212022202305101520253035
201720182019202020212022202305101520253035
Introduction
Ye Yuan currently works at the Department of Aerospace Engineering at Swansea University. He does research in aerodynamics, flight dynamics, and the safety of the rotorcraft. Their current project is Safety Assessment for the Urban-Air-Mobility, funded by the Department for Transport, UK.
Additional affiliations
October 2021 - present
Swansea University
Position
  • Lecturer
July 2019 - September 2021
University of Glasgow
Position
  • Research Assistant
September 2013 - October 2019
Nanjing University of Aeronautics & Astronautics
Position
  • PhD Student

Publications

Publications (22)
Article
Although a coaxial compound helicopter can takeoff without propeller in the normal condition, the distance should be as short as possible for obstacle avoidance when the vehicle operates in a confined area with heavy loads. Therefore, a suitable propeller control is required to improve the takeoff performance while the total power consumption is no...
Article
This work was focused on the conversion and reconversion maneuvers of XV-15 tilt rotor aircraft between helicopter and airplane modes. To alleviate pilot workload and improve safety, we proposed a multi-objective optimization method. Firstly, an augmented dynamics model has been developed and validated. Then, the transition maneuver was formulated...
Article
Full-text available
The tiltrotor has unique flight dynamics due to the aerodynamic interference characteristics. Multiple aerodynamics calculation approaches, such as the CFD method, are utilised to characterise this feature. The calculation process is usually time-consuming, and the obtained results are generally varied from each other. Thus, the uncertainty quantif...
Article
Full-text available
The aerodynamic interference between the different components of quad-tiltrotor (QTR) aircraft were considered to analyze its influence on trim characteristics. A comprehensive method with the fixed-wake model was developed for multiple aerodynamic interactions, improving the accuracy of the flight dynamics analysis. Additionally, a more general co...
Article
Full-text available
The tiltrotor aircraft has unique flight dynamics characteristics because of the extensive aerodynamic interference and the unique control strategy. Inverse simulation offers an opportunity to study a vehicle's performance during manoeuvring flights. In this paper, an improved inverse simulation method is developed with an Automatic Differentiation...
Conference Paper
The tiltrotor aircraft has unique flight dynamics characteristics and handling qualities due to its multiple unique designs. However, these designs may lead to additional manufacturing errors, and these uncertainties may play a significant effect on the flight dynamics and handling qualities. Therefore, this article combines a validated flight dyna...
Article
Full-text available
The paper will review the development and application of the mathematical modelling of the advanced rotorcraft configuration, including compound helicopter configurations and tilt-rotor vehicles. The mathematical model is the basis for the design of the flight control system and an essential tool to assess the flying and handling qualities for heli...
Conference Paper
Full-text available
The tiltrotor aircraft has the capability to extend its performance characteristics compared to the conventional helicopter. However, the performance features, namely the maximum flight duration and flight range, are determined by a series of factors, such as the nacelle angle, the aerodynamic interference, and the effect of the fuel consumption. I...
Article
The coaxial compound configuration has been proposed as a concept for future high-performance rotorcraft. The co-axial rotor system requires no anti-torque device, while the longitudinal thrust is provided by a propeller. A well-designed propeller can ensure both the performance and the cruise efficiency. The propeller design also influences the fl...
Article
The coaxial compound helicopter with lift-offset rotors has been proposed as a concept for future high-performance rotorcraft. This helicopter usually utilizes a variable-speed rotor system to improve the high-speed performance and the cruise efficiency. A flight dynamics model of this helicopter associated with rotor speed governor/engine model is...
Article
Coaxial compound helicopters adopt the lift-offset (LOS) strategy to improve the rotor performance in high-speed flight, which influences the flight dynamics characteristics of the vehicle. Thus, a flight dynamics model and an inverse simulation method are developed to assess the effect of LOS on this helicopter. The trim results demonstrate that L...
Conference Paper
The coaxial compound helicopters have obtained a lot of research interest due to their outstanding performance, especially in high speed flight. This rotorcraft could use the longitudinal cyclic pitch and the elevator to control the pitching moment during the flight. In order to investigate the effect of different longitudinal control strategy on t...
Article
Full-text available
The coaxial compound helicopter has two possible strategies for heading control: collective differential and rudder deflection. A flight dynamics model is developed to assess the effect of different heading control strategies. This includes the trim characteristics, steady flight performance, controllability, and manoeuvrability. The trim study dem...
Article
The coaxial rigid rotor helicopter has been proposed as a future high-performance rotorcraft concept. However, the aerodynamic interference of this helicopter is complicated because it couples with the unique flapping feature of the rigid rotor, which further alters the trim characteristics of coaxial rigid rotor helicopters. Thus, a multi-point vo...
Article
The coaxial compound configuration has been proposed as a concept for future high-performance rotorcraft. The co-axial rotor system does not require an anti-torque device, and a propeller provides axial thrust. A well-designed control strategy for the propeller is necessary to improve the performance and the flight dynamics characteristics. A fligh...
Article
Full-text available
In order to research on the effect of lateral cyclic pitch differential and rotor control phase angle on the flight dynamic characteristics of coaxial rigid rotor high-speed helicopter. By using the validated flight dynamic model of XH-59 helicopter, analyze the influence of lateral cyclic pitch differential and rotor control phase on the trim char...
Article
Full-text available
The rotor spacing of coaxial rigid rotor helicopter is relatively small and lead to more complex aerodynamic-interference, which could affect the flight dynamic characteristics. Aiming at this problem, this paper utilized the vortex ring dynamic wake method to build the aerodynamic model of the coaxial rotor. The accuracy of this aerodynamic model...
Article
Adopting the flight dynamic model of coaxial rigid rotor helicopter, this paper sets the XH-59A coaxial rigid rotor helicopter as research object and analyzes the influence of rotor control phase angle on longitudinal trim characteristics, helicopter power required and hub bending moment of upper and lower rotor. Based on the analysis results, this...
Article
Full-text available
Adopting the flight dynamic model of coaxial rigid rotor helicopter, set the XH-59A helicopter in copter mode as object, analyze the influence of rotor control phase angle on longitudinal trim characteristics, helicopter power required and hub bending moment of upper and lower rotor. The result shows: with increasing forward speed, enhancing the ro...
Article
Aiming at the difference between the coaxial rigid rotor and the conventional rotor, the aerodynamic models of coaxial rigid rotor are built in terms of rotor flapping, pitch control and induced velocity. The flapping movement function of the coaxial rigid rotor is introduced based on the concept of equivalent flapping. The pitch control motion fit...

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Projects (2)
Project
YouTube channel: https://www.youtube.com/channel/UC7_FUJYx--o6pOAePAhr5mQ LinkedIn page: https://www.linkedin.com/groups/8770531/ Web page: https://www.gla.ac.uk/research/az/mentor/ MENtOR is a result of the activities of the UK Vertical Lift Network (UKVLN). UKVLN is a network funded by ESPRC (EP/M018164/1) aiming to bring together the rotorcraft research community of the UK. MENtOR itself is aiming to develop and validate methods and tools that can be used for the design and analysis of the next-generation rotorcraft. The project is necessary because the conventional configuration of a vertical flying machine is changing from a helicopter with main and tail rotors to different configurations, the most complex of which is the tilt-rotor. This was recently recognised by Ormiston (R.A. Ormiston, 2016, Revitalising advanced rotorcraft research and the compound helicopter. The Aeronautical Journal, 120, pp 83-129) who performed a review on the future of vertical flying machines as part of his American Helicopter Society Nikolsky award and lecture. In the UK, the tiltrotor configuration has been selected by the rotorcraft industry to be on the roadmap of the Technology Strategy Board for development, based on the AW 609 aircraft and the Clean-Sky 2 initiative. Recent progress with the AW609 highlights the relevance of the proposal and the challenge at hand to design safe and efficient vertical flight machines of such complexity, and the need for research to provide trained engineers with the necessary tools, data and understanding. MENtoR is a combined effort that includes all researchers in the UK active in the rotorcraft filed. The development of high-fidelity design and simulation tools is a primary objective equal in importance to the validation of the tools using test data. To support this activity MENtOR capitalises on the investment of ATI (former UK Aerodynamics) on the manufacturing of a test rig suitable for wind tunnel experimentation and able to accommodate tilt-rotor configurations. This new facility is currently undergoing commissioning and MENtOR will be the first project to utilise it. Finally, MENToR has as strong exploitation and dissemination arm that aims to maintain and enhance the position of the UK in the international rotorcraft scene and ensure that the UK industry is well-supported with trained staff, tools and fundamental research to embark in the design and development of this new breed of rotorcraft.
Project
research on the flight dynamic characteristics of coaxial rigid rotor