液相格子乱流における反応性スカラー拡散の研究 : 第2報,連続競争反応の場合(流体工学,流体機械)

概要

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A diffusion field with a competitive-consecutive reaction (A+B→R, R+B→S) in a liquid grid-turbulence has been experimentally investigated. The instantaneous concentrations of two reactive species (R and S) and a nonreactive dye (C) are measured simultaneously by the light absorption spectrometric method. The concentration of species A and B are determined by the conservation law. The statistics of reactive scalar fields are compared with the nonreactive scalar ones. It is found that the mean concentrations of reactants A and B decrease while those of product R and S increase in the downstream direction by a chemical reaction. With regard to the scalar fluctuations, it is also observed that the r.m.s. values for species A become larger than those in the nonreactive case under the present experimental conditions, whereas the r.m.s. values for species B become smaller. Furthermore, the correlation coefficients between species A and B are negative and those between B and R are positive in the present measurement region. The present data give very important information for the modeling of the concentration correlation and chemical source term in a turbulent reactive flow.
社団法人日本機械学会の論文
2009-01-25