超音波による乱流混合反応促進(流体工学,流体機械)

概要

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The effects of ultrasound on turbulent mixing and chemical reaction were experimentally investigated in reacting and non-reacting liquid mixing-layer flows downstream of a turbulence-generating grid. The experiments were carried out under the condition that the ultrasound hardly causes acoustic cavitation. Instantaneous velocity and concentration were simultaneously measured using a combination of a laser-Doppler velocimeter and a laser-induced fluorescence method. The results show that both turbulent mixing and chemical reaction are promoted by high-frequency ultrasound. The ultrasound can be regarded as a better tool for promoting turbulent mixing and chemical reaction than mean shear, because turbulent mass transfer at smaller scales is more enhanced by ultrasound compared to the sheared case.
一般社団法人日本機械学会の論文
2002-01-25