Turbulence modulation simulation of sonic boom using field explosion experiments

2014 Fiscal Year Final Research Report

• Project/Area Number: 26630442
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Aerospace engineering
• Research Institution: Nagoya University
• Principal Investigator: SASOH Akihiro 名古屋大学, 工学(系)研究科(研究院), 教授 (40215752)
• Co-Investigator(Renkei-kenkyūsha): YOKOTA Shigeru 筑波大学, システム情報系, 准教授 (30545778) ; SAKAI Yasuhiko 名古屋大学, 大学院工学研究科, 教授 (20162274) ; NAGATA Kouji 名古屋大学, 大学院工学研究科, 准教授 (50274501) ; NAKAYAMA Yoshio 独立行政法人産業技術総合研究所, 安全科学研究部門, 研究グループ長 (20357677)
• Project Period (FY): 2014-04-01 – 2015-03-31
• Keywords: 衝撃波 / ソニックブーム / 乱流 / 爆発実験 / 圧力変調

Outline of Final Research Achievements

In this study, experimental simulation method of evaluating overpressure variation induced by a blast wave interacting with turbulent flow was developed. The blast wave was generated using a 0.51-gram power. The turbulent flow was generated with an electrical fan, duct and grid. Overpressure histories were measured using four microphones set symmetrically. A 40 % standard deviation in overpressure was obtained, thereby demonstrating spatiotemporal behavior as the result of the shock wave-turbulence interaction.

Free Research Field

航空宇宙工学