Development of microscale multicomponent concentration measurement device by a laser light absorption spectrometric method and clarification of non-equilibrium chemical reaction process

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K13868
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Fluid engineering
• Research Institution: Nagoya University
• Principal Investigator: Sakai Yasuhiko 名古屋大学, 工学研究科, 教授 (20162274)
• Co-Investigator(Renkei-kenkyūsha): NAGATA Kouji 名古屋大学, 大学院工学研究科, 教授 (50274501) ; ITOU Yasumasa 名古屋大学, 大学院工学研究科, 准教授 (40346078) ; IWANO Koji 名古屋大学, 大学院工学研究科, 助教 (20750285)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 流体工学 / 光ファイバ / 濃度計測 / 乱流 / 吸光光度法

Outline of Final Research Achievements

In this study, a new type of optical fiber probe was developed to measure small scale fluctuation of multiple diffusive matters simultaneously in turbulent liquid flows. The size of measurement volume of the probe is 100 μm or less, which is the highest spatial resolution as an absorption type concentration measurement device in the world. Concentration fluctuations of the high Schmidt number diffusing dyes were measured in a liquid axisymmetric jet with the new probe. As a result, in the smaller range than the Kolmogorov micro-scale (i.e., in the viscous-convective subrange), we could observe the trending that the power exponent of the concentration fluctuation spectrum with respect to the wave number approaches -1.

Free Research Field

流体工学