The development of a pressure estimation method based on Schlieren coupling of CFD

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K14655
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 19010:Fluid engineering-related
• Research Institution: Osaka Institute of Technology
• Principal Investigator: Ukai Takahiro 大阪工業大学, 工学部, 講師 (80813534)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: シュリーレン法 / 流体可視化 / 圧力推定 / CFD / 計測融合

Outline of Final Research Achievements

The gas pressure, density, and velocity estimation methods based on a schlieren image were developed in this study. Several image fibres were applied to a BOS method, and the measurement technique enables us to measure a time-resolved three-dimensional density field using a single high-speed camera. Additionally, the optimal user-defined parameters were clarified for a physics based schlieren image velocimetry, namely a SME method. The SME method with the optimal parameters estimates successfully a good velocity field in a low Reynolds number region. We attempted developing a pressure estimation method and provided the technical issues for the improvement of its system achievement.

Free Research Field

圧縮性流体力学

Academic Significance and Societal Importance of the Research Achievements

本研究で取り組んだシュリーレン法を基にした密度・速度・圧力推定法は，トラッキング粒子が不要であり計測環境を問わない故に，ユーザーフレンドリーな計測手法である．特に，本研究で開発した1台の高速度カメラによる時系列三次元密度場計測手法は，低導入コストおよび省設置スペースを達成しており，広範囲のユーザーが複雑な流動現象を調査することが可能となる．また，シュリーレン法を基にした圧力推定法の開発において課題を明らかにしたことで，今後の手法開発の発展に寄与できると期待している．