Concentration measurement in a planar liquid jet with a chemical reaction by using the improved concentration measurement system based on the light absorption spectrometric method

• NAITO Takahiro

  Department of Mechanical Science and Engineering, Nagoya University

• WATANABE Tomoaki

  Department of Mechanical Science and Engineering, Nagoya University Research Fellow of Japan Society for the Promotion of Science

• SAKAI Yasuhiko

  Department of Mechanical Science and Engineering, Nagoya University

• NAGATA Kouji

  Department of Mechanical Science and Engineering, Nagoya University

• ITO Yasumasa

  Department of Mechanical Science and Engineering, Nagoya University

抄録

We improve a spatial resolution of concentration measurement system based on the light absorption spectrometric method, which is used to measure instantaneous concentrations of multiple absorptive species. Light-emitting diodes (LEDs), which have a higher light intensity than a halogen lamp used in the former concentration measurement system, are used as light sources of the new concentration measurement system. We also develop a new optical fiber probe with a higher spatial resolution than the former one. The diameter of the optical fiber bundle and the length of the sampling volume of the new optical fiber probe are 0.1 mm and 0.5 mm, respectively. The sampling volume of the new optical fiber probe is 35 times smaller than that of the former one. In a turbulent planar liquid jet with a second-order chemical reaction A ＋ B → R, concentrations of all reactive species are measured by using the new concentration measurement system, and we validate the new concentration measurement system by comparing the measurement results obtained by the new system with those obtained by the former system. The results show that the mean concentrations of reactive species measured by the new system are consistent with those measured by the former system. The power spectra of concentration fluctuations of reactive species show that the new system is able to measure the concentration fluctuations up to higher frequency ranges than the former system.

収録刊行物

• Journal of Fluid Science and Technology

  Journal of Fluid Science and Technology 9 (3), JFST0041-JFST0041, 2014

  一般社団法人 日本機械学会

キーワード

• Turbulent flow
• Jet
• Mixing
• Chemical reaction
• Concentration measurement

詳細情報

• CRID: 1390001205247235072
• NII論文ID: 130004695310
• DOI: 10.1299/jfst.2014jfst0041
• ISSN: 18805558
• Web Site: https://www.jstage.jst.go.jp/article/jfst/9/3/9_2014jfst0041/_pdf
• 本文言語コード: en
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