WilliamHill中文官网航空航天工程系学术报告

报告人： 温志湧，香港理工大学

时间： 9月1日（周一）下午15:00-16:00

地点： WilliamHill中文官网入口新奥工学大楼3F-3048

主持人：赵皓 研究员 

Abstract : 本报告将系统展示课题组在斜爆轰波的起爆领域的两项成果： 首先介绍课题组关于来流边界层影响下的斜爆轰波起爆特性的研究进展。 该研究基于内部大规模并行分块结构化有限体积求解器 PHAROS， 考虑详细化学反应， 报道了突跃型和光滑型斜爆轰波对来流边界层的不同响应，并揭示了其形成机制。 针对有限长斜劈诱导的斜爆轰波， 提出了同时考虑马赫数，无量纲来流边界层厚度和无量纲斜劈长度下的统一爆轰起爆准则。 在此基础上，提出了采用凹曲面控制斜爆轰波诱导边界层分离的方案。 相关数值模拟结果显示， 凹曲面的曲率半径存在最优解。 最优解既可显著抑制边界层分离亦可有效借助热边界层缩短起爆距离。 其次， 首次提出了低马赫数下于有限长斜劈上辅助诱导斜爆轰波起爆的能量沉积方法，采用数值模拟研究了等离子体辅助起爆中的局部能量沉积效应，着重分析了不同能量沉积形式和功率/脉冲能量对斜爆轰波起爆特性的影响。结果表明，连续式与脉冲式局部能量沉积均可有效辅助斜爆轰波实现快速起爆。随着连续式局部能量沉积功率或是脉冲式能量沉积脉冲能量的增大，有限长斜劈上逐渐出现不起爆， 多种延迟起爆模态和直接起爆模态。基于对单脉冲局部能量沉积作用下起爆波系的时空演化特性分析，获得了斜爆轰波持续起爆所需的最低脉冲重复频率，并在采用重复脉冲的数值模拟中得到了验证。综合考虑脉冲能量和重复频率，脉冲式局部能量沉积辅助斜爆轰波起爆所需的最低平均功率比连续式的降低了约 1 个数量级。

Bio: Professor Chih-Yung Wen received his Bachelor of Science degree in Mechanical Engineering from National Taiwan University in 1986. He subsequently earned his Master of Science and Doctor of Philosophy degrees in Aeronautics from the California Institute of Technology (Caltech), USA, in 1989 and 1994, respectively. He commenced his academic career at the Department of Mechanical Engineering, Da-Yeh University, Taiwan, where he was promoted to full Professor in 2002. In 2012, he was appointed Professor in the Department of Mechanical Engineering at The Hong Kong Polytechnic University. From 2019 to 2025, he served as Interim Head and subsequently Head of the Department of Aeronautical and Aviation Engineering. He currently holds the position of Chair Professor of Aeronautical Engineering and serves as Director of the Research Institute of Large Aircraft, Director of the Research Center of Uncrewed Autonomous Systems, and Associate Director of the Research Institute for Sports Science and Technology. Professor Wen has authored or co-authored more than 300 scientific publications, including journal articles, conference proceedings, and book chapters, and is the holder of 14 patents. He is a Fellow of the American Society of Mechanical Engineers (ASME), the Royal Aeronautical Society (RAeS), and the Hong Kong Institution of Engineers (HKIE), as well as an Associate Fellow of the American Institute of Aeronautics and Astronautics (AIAA).

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