Development of ultra-high-speed image-based technology for the study of lightning and lightning interactions

开发用于研究闪电和闪电相互作用的超高速图像技术

• 批准号: 2751179
• 金额: --
• 依托单位: CARDIFF UNIVERSITY
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2751179
• 关键词: Development; ultra; speed; image; based

Lightning is one of the most unpredictable and destructive forces in nature, and poses a considerable threat to building infrastructure, transportation links, data connections, and power distribution networks. Climate change has seen a dramatic increase in the frequency and energy of lightning strikes worldwide over the last twenty years, and this trend is predicted to continue. There is growing scientific interest in developing new tools and techniques for the fundamental study of lightning and lightning interactions with materials and structures, to better mitigate destructive effects. The characterisation of lightning arc evolution, temperature gradients, and energy distribution and dissipation on the nanosecond timescale are all key to this work.This project aims to develop ultra-high-speed image-based technology to record and measure the electromagnetic emissions from both high voltage and high current laboratory generated lightning arcs both within the air and its interaction with conductive and insulating materials. This will primarily include optical emission spectroscopy, but also still, video, and schlieren techniques. The focus will be within the 250 to 950 nm wavelength range for lightning arcs up to 400 kV and 200 kA. Mathematical analysis and modelling techniques will then be used to derive various characteristics. The primary application will be the electrical energy sector, but other sectors will also be included, such as the built environment and transportation.This is a joint project between the Schools of Engineering and Physics, and it will be based at Cardiff University's lightning research laboratory. This facility is the only one of its kind in Europe, and one of only a few worldwide, incorporating a wide range of advanced diagnostic and analytical capabilities. The successful candidate will be integrated into a long-established and world-leading research group with excellent opportunities for mentoring and collaboration, particularly with our national and international academic and industrial partners.The student will be enrolled in a programme of practical training, and will be expected to participate in seminars, conferences, and the preparation of journal papers and grant applications. There may also be opportunities to be involved in public engagement, such as talks at schools, youth groups, and festivals. Some national and international travel is expected.

闪电是自然界中最不可预测和最具破坏性的力量之一，对基础设施建设、交通连接、数据连接和配电网络构成相当大的威胁。在过去的二十年里，气候变化在全球范围内见证了闪电频率和能量的急剧增加，预计这一趋势将继续下去。人们越来越有兴趣开发新的工具和技术，用于基础研究闪电和闪电与材料和结构的相互作用，以更好地减轻破坏性影响。这项工作的关键是在纳秒时间尺度上表征闪电弧的演化、温度梯度以及能量分布和耗散。该项目旨在开发基于超高速图像的技术来记录和测量实验室在空气中产生的高压和大电流闪电弧的电磁辐射及其与导电和绝缘材料的相互作用。这将主要包括光学发射光谱技术，但也包括静止、视频和纹影技术。对于400千伏和200千伏以下的闪电弧光，焦点将在250到950 nm的波长范围内。然后将使用数学分析和建模技术来推导出各种特性。主要的应用将是电力部门，但也将包括其他部门，如建筑环境和交通。这是工程学院和物理学院的联合项目，将设在卡迪夫大学的闪电研究实验室。该设施是欧洲唯一的此类设施，也是世界上仅有的几个设施之一，集成了广泛的先进诊断和分析能力。成功的候选人将被纳入一个历史悠久的世界领先的研究小组，该小组有很好的指导和合作机会，特别是与我们的国内和国际学术和工业合作伙伴。学生将参加一个实践培训计划，并将参加研讨会，会议，以及准备期刊论文和拨款申请。也可能有机会参与公共活动，例如在学校、青年团体和节日上发表演讲。预计会有一些国内和国际旅行。