Unified method for unsteady analysis of cavitating turbulent flow

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K14888
• 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 University
• Principal Investigator: OKABAYASHI Kie 大阪大学, 大学院工学研究科, 助教 (40774162)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: キャビテーション / 乱流 / 翼 / Large-eddy simulation / 数値流体力学

Outline of Final Research Achievements

As a numerical simulation technique for cavitation, which is a phase change phenomenon that has harmful effects on fluid machinery such as rocket engine turbopumps, we have developed an engineering practical mathematical model (equations necessary for numerical simulation) and calculation method that can represent individual cavitation phenomena of various scales, from micro-scale bubbles to macro-scale sheet-like gas films on the surface of objects, and can be calculated under realistic computational cost.

Free Research Field

数値流体力学

Academic Significance and Societal Importance of the Research Achievements

キャビテーションは様々な形態が存在し，それに付随する現象も多岐にわたるが，それらを統一的に表すことができる普遍的な数理モデル（数値シミュレーションを行うために必要な方程式）は存在しない．本研究では流体機械の一要素である翼の周りにおける多様なキャビテーション流れをシミュレートする数理モデルを開発し，普遍的な数理モデル開発への道筋を示した．また，本モデルにより流体機械の解析精度の向上が見込まれる．