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Numerical and Experimental Study on Plasma and Electromagnetic Wave Interaction in a Weakly Ionized Flow

弱电离流中等离子体与电磁波相互作用的数值与实验研究

基本信息

批准号：
1939331
负责人：
金额：
--
依托单位：
University of Southampton
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2017
资助国家：
英国
起止时间：
2017 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-1939331
关键词：
Numerical Experimental Study Plasma Electromagnetic

项目摘要

The project is proposing state-of-art nonequilibrium plasma model coupled with computational electromagnetic methods and an innovative blackout experiment configuration using non-thermal plasma source which can overcome the limitation of current ground-based experimental facilities. This project will contribute to developing a disruptive blackout mitigation technology through a high-fidelity physical model for strong thermochemical nonequilibrium flow and an innovative ground-based blackout experimental method. Compared to previous radio blackout studies which are investigated a radio blackout under the point of non-equilibrium aerothermodynamics, the project will consider the comprehensive electromagnetic model of electrons including the effects of electron density fluctuation. Although the aerothermodynamic of a vehicle is the primary mechanism to create a plasma layer around the vehicle, it has a limited role in describing the mechanism of radio wave attenuation. Considering electromagnetism in electron rich conditions will help to investigate the detailed mechanism of radio blackout and the effectiveness of blackout mitigation schemes particularly using a magnetic field and metallic particles. The simplified signal attenuation model used in the previous studies cannot be employed to accurately predict signal attenuation under magnetised dusty plasma conditions because it is based on the assumptions that the plasma is non-magnetised, non-collisional, dust-free, and relatively thick in the direction of wave propagation. This project takes a multidisciplinary approach involving plasma physics and computational electromagnetics to study a re-entry radio blackout which can bring experts in different disciplines and create new collaborative research link to overcome the scientific barriers between disciplines such as laser fusion and space plasmas. Therefore, the outcome of this project will enhance the technological competitiveness of the UK space sector, and create the momentum and foundation toward the commercialization of space, which will deliver tremendous economic and security benefits to the UK.

该项目提出了最先进的非平衡等离子体模型，与计算电磁方法相结合，以及使用非热等离子体源的创新停电实验配置，可以克服当前地面实验设施的限制。该项目将通过强热化学非平衡流的高保真物理模型和创新的地面停电实验方法，有助于开发颠覆性停电缓解技术。与之前研究非平衡空气热力学点下的无线电停电研究相比，该项目将考虑电子的综合电磁模型，包括电子密度涨落的影响。尽管车辆的空气热力学是在车辆周围产生等离子体层的主要机制，但它在描述无线电波衰减机制方面的作用有限。考虑富电子条件下的电磁学将有助于研究无线电停电的详细机制以及停电缓解方案的有效性，特别是使用磁场和金属颗粒的方案。先前研究中使用的简化信号衰减模型无法准确预测磁化尘埃等离子体条件下的信号衰减，因为它基于等离子体非磁化、非碰撞、无尘且在波传播方向相对较厚的假设。该项目采用涉及等离子体物理学和计算电磁学的多学科方法来研究再入无线电中断，它可以汇集不同学科的专家并创建新的合作研究联系，以克服激光聚变和空间等离子体等学科之间的科学障碍。因此，该项目的成果将提升英国航天领域的技术竞争力，为航天商业化奠定动力和基础，为英国带来巨大的经济和安全利益。