Unsteady flow generation without moving motion -development of active flow control system based on unsteady aerodynamics-

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K14343
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 24010:Aerospace engineering-related
• Research Institution: Tohoku University
• Principal Investigator: Sato Shintaro 東北大学, 工学研究科, 助教 (60869650)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: プラズマアクチュエータ / 流体制御 / 非定常空気力学

Outline of Final Research Achievements

Numerical and experimental studies have been carried out to induce an unsteady flow field, typically induced by the motion of the airfoil, using a plasma actuator (PA) attached to a fixed wing. Numerical simulation has shown that a similar flow field to that induced by the pitching motion of the airfoil can be reproduced by adding an electrohydrodynamic force to the surface of the fixed wing. It has been experimentally demonstrated that a similar flow structure to that obtained by numerical simulation and unsteady aerodynamic lift generation can be achieved by operating the PA to induce an ionic wind upstream (in the opposite direction to the conventional method of PA operation).

Free Research Field

流体工学

Academic Significance and Societal Importance of the Research Achievements

これまでの PA を用いた流れの制御は、剥離流れを抑制することに重きを置いていたことに対し、本研究では、剥離の促進によって流れ場を制御する手法の構築に取り組んだ。本研究課題で得られた知見を活用することで、既存の固定翼機に PA を取り付けるだけで安定な飛行が可能になるだけでなく、飛翔生物のような機動性の高い運動を可能にする技術の確立に繋げることが期待される。また、本研究課題は従来とは大きく異なる手法を用いて非定常な流れ場の制御を試みるものであり、非定常空気力学に新たな知見を与えることが期待される。