Development of ultra-high-resolution optical-fiber probe for the measurement of fluctuation concentration of multiple species by the discrete light-absorption spectrometric method

点击翻译按钮获取中文摘要

In this study, to investigate the mixing/reactive fields of high-Schmidt number multiple species which are typically observed in the liquid phase, the ultra-high-resolution optical-fiber probe with the resolution of micro-scale order has been developed by the discrete light-absorption spectrometric method. By using this new developed probe, in a turbulent planar liquid jet with a second-order chemical reaction, the concentrations of all chemical species are measured, and the fundamental characteristics of reactive concentration statistics are investigated and the useful data for the examination of the molecular mixing model in the PDF (Probability Density Function) method are provided. Further the interface between the turbulent and non-turbulent region is detected and the various conditional statistics in the turbulent region are measured. From these results, the mechanism of mixing of chemical species near the turbulent/non-turbulent interface is clarified.