Development of erosion modeling technology with shock wave measurement

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K20446
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0303:Civil engineering, social systems engineering, safety engineering, disaster prevention engineering, and related fields
• Research Institution: Nagaoka University of Technology
• Principal Investigator: Fujisawa Kei 長岡技術科学大学, 産学融合トップランナー養成センター, 特任講師 (60906080)
• Project Period (FY): 2021-08-30 – 2023-03-31
• Keywords: 液滴衝撃エロージョン

Outline of Final Research Achievements

In this study, the detailed mechanisms of the high-speed liquid droplet impingement erosion were investigated and models were developed. For modeling the shock wave caused by the high-speed liquid droplet impact, compressible multiphase flow simulations were performed, and the relationship between the surface condition of the target material and the droplet impact force was clarified. Furthermore, the progression mechanism of the high-speed liquid droplet impingement erosion was clarified through erosion test, and a model was developed to estimate the erosion distribution by shock wave measurements.

Free Research Field

機械工学

Academic Significance and Societal Importance of the Research Achievements

高速な液滴衝突によって生成される減肉現象である液滴衝撃エロージョンは、原子力・火力発電所の配管で発生することが知られている。液滴衝撃エロージョンの発生により配管に貫通穴を形成するため、大規模な事故に発展する可能性がある。本研究で取り組んだ、液滴衝突時に発生する衝撃波のモデリングと減肉面の再構築による減肉分布推定技術は、原子力・火力発電所における配管の安全管理に役立つと考えられる。