Hyperthermal atomic oxygen effects on satellite systems

高温原子氧对卫星系统的影响

• 批准号: 2321313
• 金额: --
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2321313
• 关键词: Hyperthermal; atomic; oxygen; effects; satellite

The University of Manchester is developing a unique experimental facility that replicates hyperthermal atomic oxygen flux in very low Earth orbits (VLEO), essentially a rarefied flow wind tunnel, called the Rarefied Orbital Aerodynamics Research Facility (ROAR). It will be a unique facility able to characterise the reemitted flow from surfaces and thereby determine their aerodynamic properties. The student will be one of the few PhD students with access to the ROAR facility, being able to participate in its set up, working to support its optimization beyond existing funded projects, and developing new technologies which can be validated using the facility. Whilst much materials science has been carried out on atomic oxygen erosion, almost none exists in relation to the beam scattering characteristics of materials and therefore their aerodynamic properties. This has implications for aerodynamic optimisation for drag minimization and aerodynamic control, and for atmospheric sensor development. In addition, the erosion characteristics of novel materials, as well as systems such as solar array interconnects, need to be characterized.The student is still in their first year, but the project is narrowing down on possible directions:The student will help to answer a number of research questions:1. How closely does ROAR reproduce the aerodynamic and erosion effects of the real VLEO environment, and what improvements can be made to create better alignment?2. How can the flow density of ROAR be improved to allow more rapid erosion experiments?3. How can we determine the flow direction in VLEO to support aerodynamic control methods and other applications?4. Does a greater understanding of gas surface interactions with hyperthermal atomic oxygen affect the design of systems and sensors?Based on experimental results the student will work to develop the fundamental science of gas-surface interactions of the atmosphere with surfaces, and work to improve the performance of ROAR and how well it represents the real VLEO environment.Depending on the studies during the PhD, specific activities could include: Developing improvements to ROAR to increase the atomic oxygen flux enabling erosion studies of materials and satellite systems. Developing VLEO sensors, such as a flow sensor, for use with aerodynamic attitude control concepts and other applications. Comparing materials performance from satellite flight data with that from ROAR to determine what changes to the system may be required to more closely replicate the VLEO environment, and how these could be implemented. Use gas surface interaction data to inform the design of sensors and systems

曼彻斯特大学正在开发一种独特的实验设备，可以复制极低地球轨道(VLEO)中的超热原子氧通量，本质上是一种稀薄流动风洞，称为稀薄轨道空气动力学研究设备(Roar)。它将是一种独特的设备，能够表征从表面重新发射的气流，从而确定它们的空气动力学特性。这名学生将是能够访问Roar设施的为数不多的博士生之一，能够参与其设置，努力支持其优化，超越现有的资助项目，并开发可以使用该设施进行验证的新技术。虽然许多材料科学已经对原子氧侵蚀进行了研究，但几乎没有与材料的光束散射特性相关的研究，因此也没有与其空气动力学特性相关的研究。这对阻力最小化和空气动力学控制的空气动力学优化以及大气传感器的开发具有重要意义。此外，还需要对新材料以及太阳能电池阵列互连等系统的侵蚀特性进行表征。学生还在一年级，但该项目正在缩小可能的方向：学生将帮助回答一些研究问题：1.咆哮如何再现真实VLEO环境的空气动力学和侵蚀效应，如何改进才能产生更好的对准？2.如何提高Roar的流动密度以允许更多的快速侵蚀实验？3.我们如何确定VLEO中的流动方向以支持空气动力学控制方法和其他应用？4.更好地了解气体表面与高温原子氧的相互作用是否会影响系统和传感器的设计？根据实验结果，学生将致力于发展大气与表面的气体-表面相互作用的基础科学，并努力提高Roar的性能以及它对真实VLEO环境的模拟程度。取决于博士期间的学习，具体活动可包括：改进Roar，以增加原子氧通量，从而能够对材料和卫星系统进行侵蚀研究。开发VLEO传感器，如流量传感器，用于气动姿态控制概念和其他应用。将卫星飞行数据的材料性能与Roar的材料性能进行比较，以确定可能需要对系统进行哪些更改才能更紧密地复制VLEO环境，以及如何实施这些更改。使用气体表面相互作用数据为传感器和系统的设计提供信息