Fly By Light Power: Improvement in High-Speed Aerodynamics with Low-Power Deposition

2014 Fiscal Year Final Research Report

• Project/Area Number: 22226014
• Research Category: Grant-in-Aid for Scientific Research (S)
• Allocation Type: Single-year Grants
• 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(Kenkyū-buntansha): SAKAI Yasuhiko 名古屋大学, 大学院工学研究科, 教授 (20162274) ; SAKAI Takeharu 名古屋大学, 大学院工学研究科, 准教授 (90323047) ; MATSUDA Atsushi 名城大学, 理工学部, 准教授 (80415900) ; YOKOTA Shigeru 筑波大学, システム情報系, 准教授 (30545778)
• Co-Investigator(Renkei-kenkyūsha): NAGATA Kouji 名古屋大学, 大学院工学研究科, 准教授 (50274501)
• Project Period (FY): 2010-04-01 – 2015-03-31
• Keywords: 超音速流れ / レーザー / エネルギー付加 / 乱流 / 圧力変調 / 抗力 / 衝撃波 / 境界層

Outline of Final Research Achievements

This study aimed for vastly improving supersonic aerodynamic performance by repetitive laser pulse energy depositions. The following results were obtained: (1) Utilizing the momentum production from the interaction between a shock wave and a laser-heated bubble, a wave drag reduction of higher than 20 % and an efficiency of energy deposition of 10 (1000%) were obtained. (2) It was demonstrated that boundary layer separation could be suppressed by the laser energy deposition onto shock wave-boundary interaction region. (3) A standard deviation of one order in magnitude larger than the average decrement in post-shock overpressure modulation past turbulence was obtained, thereby demonstrating the possibility of strongly influencing pressure fields even through weak spatiotemporal inputs.

Free Research Field

航空宇宙工学