Propeller Aerodynamic Interaction and Noise Characteristics in Distributed Propulsion

分布式推进中螺旋桨气动相互作用和噪声特性

• 批准号: 2615359
• 金额: --
• 依托单位: University of Bristol
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2615359
• 关键词: Propeller; Aerodynamic; Interaction; Noise; Characteristics

The transportation technology has greatly advanced in the past two decades, leading to rapid development in the area of Urban Air Mobility (UAM), which sees the unmanned aerial vehicles and short-haul electric aircrafts to gradually become an integral part of our daily life. The UAM market is currently projected to reach an industrial value of 1.5 trillion USD by 2040. Compared to the research efforts into conventional aircraft aerodynamics and aeroacoustics, research into electrical distribution propulsion (DP) and electrical Vertical Take-Off and Landing (eVTOL) which are the promising green (i.e. zero-emission) configurations for UAM, remains relatively scarce. This proposed research project aims to focus on the flow interactions associated with the distributed propulsion system, as well as their influence on the aerodynamically generated noise by implementing experimental measurements and numerical simulations. The study will focus on two main areas of interest: (a) the rotor-to-rotor interaction; (b) the rotor to airframe interaction. With the comprehensive and high-fidelity flow field and noise information, the project will significantly improve our knowledge and understanding of distribution propulsion configurations. Therefore, the project is timely and essential as U.K. embraces on its 'Build Back Greener' initiatives, including the FlightZero and NetZero programmes. The project leverages upon the strong numerical and experimental expertise in Bristol. The numerical simulations will be carried out using Lattice Boltzman method (LBM) for scale-resolved and efficient simulation of complex geometrical configurations (i.e., multi-propeller) and the experimental measurements will be performed in the aeroacoustic wind tunnel with highly instrumented set-up to unravel the fundamental flow and noise generation mechanisms. The project is also aligned well with several large-scale EPSRC and H2020 research initiatives in novel propulsion configurations such as ENODISE and SilentProp, which the study will learn and work with the partners in those projects for greater impact and dissemination of the results, leading to prospective project collaborations. Moreover, from the obtained results, three to four high quality research papers are expected to be published on the leading journals, as well as presented in domestic and international conferences and seminars to further explore potential opportunities to collaborate with interested institutions and industrial partners.Aims and Objectives: The proposed research will shed light on understanding of the aerodynamic interaction and the related noise characteristics in DP configurations, and are expected to:1. Establish an extensive set of numerical and experimental datasets in DP system with a focus on blade-to-blade and blade-to-airframe interactions.2. Provide assessment of the Lattice-Boltzman based solver on complex configurations.3. Investigate and understand the modifications of the near-field aerodynamics and their physical relation to the radiated noise with varying parameters in DP configurations. Research Methodologies: The project will utilise the state-of-the-art numerical tool and experimental techniques. For numerical simulations, wall-resolved simulations based on LBM will be carried out. The solver has inherent advantages on complex configurations. The experiments will be carried out in the national wind tunnel facility at Bristol. The instrumented airframes and the noise localisation arrays are designed and built with sensor techniques developed in-house. Alignment with EPSRC: The research falls under Aerodynamics and Fluid Dynamics which is a strategic research area under EPSRC engineering theme. Project Partners: Vertical Aerospace acts as an industrial advisor of the project to provide guidance to the DP configurations with an industrial perspective.

近二十年来，交通技术突飞猛进，城市空中交通（UAM）领域迅速发展，无人机和短途电动飞机逐渐成为我们日常生活中不可或缺的一部分。目前，预计到2040年，UAM市场的工业价值将达到1.5万亿美元。与传统飞机空气动力学和气动声学的研究工作相比，对UAM绿色（即零排放）配置的配电推进（DP）和电动垂直起降（eVTOL）的研究仍然相对匮乏。该研究项目旨在通过实验测量和数值模拟，重点研究与分布式推进系统相关的流动相互作用，以及它们对空气动力产生的噪声的影响。该研究将重点关注两个主要领域：（a）转子与转子之间的相互作用； (b) 旋翼与机身的相互作用。凭借全面、高保真的流场和噪声信息，该项目将显着提高我们对分布式推进配置的认识和理解。因此，随着英国拥抱“绿色重建”倡议（包括 FlightZero 和 NetZero 计划），该项目是及时且重要的。该项目利用了布里斯托尔强大的数值和实验专业知识。数值模拟将使用格子玻尔兹曼方法（LBM）进行，以对复杂的几何配置（即多螺旋桨）进行尺度解析和高效模拟，实验测量将在气动声学风洞中进行，具有高度仪器化的设置，以揭示基本的流动和噪声产生机制。该项目还与 ENODISE 和 SilentProp 等新型推进配置方面的几项大型 EPSRC 和 H2020 研究计划高度契合，该研究将学习这些内容并与这些项目的合作伙伴合作，以产生更大的影响和传播结果，从而促成未来的项目合作。此外，从所获得的结果来看，预计将在领先期刊上发表三到四篇高质量的研究论文，并在国内和国际会议和研讨会上发表，以进一步探索与感兴趣的机构和工业合作伙伴合作的潜在机会。 目的和目标：拟议的研究将有助于理解DP配置中的空气动力相互作用和相关噪声特性，并预计：1。在动态定位系统中建立一套广泛的数值和实验数据集，重点关注叶片与叶片以及叶片与机身的相互作用。 2．提供基于格子-玻尔兹曼的求解器在复杂配置上的评估。3．研究并了解近场空气动力学的修改及其与 DP 配置中不同参数的辐射噪声的物理关系。研究方法：该项目将利用最先进的数值工具和实验技术。对于数值模拟，将进行基于LBM的壁解析模拟。该求解器在复杂配置上具有先天的优势。实验将在布里斯托尔的国家风洞设施中进行。仪表机身和噪声定位阵列是采用内部开发的传感器技术设计和制造的。与 EPSRC 保持一致：该研究属于空气动力学和流体动力学，这是 EPSRC 工程主题下的战略研究领域。项目合作伙伴：Vertical Aerospace作为该项目的工业顾问，从工业角度为DP配置提供指导。