Clarification of a liquid film atomization mechanism for the realization of innovative gas turbines

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K23489
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0301:Mechanics of materials, production engineering, design engineering, fluid engineering, thermal engineering, mechanical dynamics, robotics, aerospace engineering, marine and maritime engineering, and related fields
• Research Institution: Tohoku University (2021-2022); Japan Agency for Marine-Earth Science and Technology (2019-2020)
• Principal Investigator: Oshima Ippei 東北大学, 流体科学研究所, 助教 (40851845)
• Project Period (FY): 2019-08-30 – 2023-03-31
• Keywords: 微粒化 / レイリー・テイラーの不安定性 / ガスタービン / 液膜微粒化 / 横波長 / 数値解析 / 可視化実験 / 光学計測

Outline of Final Research Achievements

In this study, transversal oscillation phenomena of an air-blasted liquid sheet were investigated by numerical simulations, visualization experiments, and optical measurements. Systematic investigations were conducted by varying the gas and liquid velocities, physical properties, and geometries of the air-blast atomizer to make a mechanistic model for the transversal oscillation of the liquid film. A mechanistic model for the droplet diameter based on the air-blasted liquid film atomization process using the model was developed, and various experiments confirmed its validity.

Free Research Field

流体工学

Academic Significance and Societal Importance of the Research Achievements

微粒化の素過程と素過程同士の相互作用に着目して研究を行った．微粒化過程の各素過程を明らかにし，素過程同士の相互作用のメカニズムが明らかにすることで，汎用性の高い微粒化モデルの構築を行った．本フレームワークを改良することで，より高精度な微粒化特性の予測を実現し，革新的なクリーンガスタービンの開発に貢献すると期待される．