2021 Fiscal Year Final Research Report

Next-generation flow control using the reduced-order model based on advanced unsteady flow measurement

Research Project

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Project/Area Number	19KK0116
Research Category	Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))
Allocation Type	Multi-year Fund
Review Section	Medium-sized Section 24:Aerospace engineering, marine and maritime engineering, and related fields
Research Institution	Tohoku University
Principal Investigator	Asai Keisuke 東北大学, 工学研究科, 教授 (40358669)
Co-Investigator(Kenkyū-buntansha)	野々村拓東北大学, 工学研究科, 准教授 (60547967) 齋藤勇士東北大学, 学際科学フロンティア研究所, 助教 (50828788) 小室淳史東京大学, 大学院新領域創成科学研究科, 助教 (70733137) 安養寺正之九州大学, 総合理工学研究院, 准教授 (70611680)
Project Period (FY)	2019-10-07 – 2022-03-31
Keywords	流体制御 / 先進流体計測 / 低次元モデル / プラズマアクチュエータ
Outline of Final Research Achievements	The purpose of this joint research is to establish a new concept of flow control theory for controlling flows with large-scale vortex structures and shock-wave oscillations by means of dynamic feedback. In collaboration with a research group at the Florida State University (FSU) in the United States, both parties brought their knowledge and technology to the research and development of three key technologies: construction of an unsteady flow database based on high-precision advanced measurements, understanding of fluid phenomena based on reduced-order models of flow fields, and driving fast-response actuators. By conducting demonstration experiments using FSU's large-scale experimental facilities for a separated flow on the afterbody model and supersonic impinging jet on the ground plate, we have established a research foundation to realize a dramatic improvement in flow control capability, which was considered impossible by conventional methodologies.
Free Research Field	航空宇宙工学
Academic Significance and Societal Importance of the Research Achievements	自動車，高速鉄道，航空機などの大気中で運動する物体には前進を妨げる空気抵抗が作用し，その大幅な低減が実現できれば地球規模のエネルギー節減が実現できる．また，これらの移動体が発生する空力騒音は社会生活の質を大きく損なうもので，抜本的な改善策が望まれていた．フロリダ州立大学の研究グループとの共同により，非定常流体データベースに基づく流れ場の低次元モデル化が可能となり，高速応答アクチュエータを用いる次世代の流体制御手法を開発するための研究基盤を構築することができた．これらの成果は流体現象の理解だけでなく，地球環境の保全や社会生活の質的向上に資するものであり，産業界への適用に道を拓くものである．