2021 Fiscal Year Final Research Report
Development of an innovative laser velocimetry without tracer particles and its application for various flow fields
| Project/Area Number |
18K18820
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 19:Fluid engineering, thermal engineering, and related fields
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2018-06-29 – 2022-03-31
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| Keywords | 流速計測 / レーザー計測 / LITGS / ヘテロダイン検出 |
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| Outline of Final Research Achievements |
Development of laser diagnostics is essentially important to understand the combustion phenomena at extremely high pressure and high temperature environments, such as rocket motor. In this study, we focused on LITGS (Laser Induced Thermal Grating Spectroscopy) which is potential laser diagnostics available for high pressure environment is applied to the velocity measurement. The purpose of this study is to develop the velocity measurement method without tracer particles based on LITGS. Towards the objectives, we developed signal analysis method using FFT and the detection method of frequency modulation using heterodyne detection. The results obtained in this study are the fundamental technique for velocity measurement using LITGS with no tracer particles.
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| Free Research Field |
燃焼工学
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| Academic Significance and Societal Importance of the Research Achievements |
ロケット開発を加速するために，ロケットエンジン内で生じている極めて高温・高圧環境下における燃焼現象の理解は重要である．そのためには，火炎温度や流速などの計測技術の高度化が不可欠である．本研究によって，高圧燃焼にも利用可能と考えられるLITGS法を応用し，従来多くの非接触流速計測手法で用いられているトレーサ粒子を添加することなく，流速を計測するための基盤技術を構築することができた．これによりロケットエンジン内の燃焼の理解が進むことで，数値シミュレーションの高度化などが期待される．
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