Abstract
Spray mixing of multiple sprays is commonly encountered in industrial applications. In the mixed droplet field, it is of interest while still challenging to quantify the mixing ratios of sprays. This work investigates the measurements of volume mixing ratios of droplet mixtures of two and three sprays with global rainbow refractometry. An algorithm is proposed to simultaneously inverse the size distributions of the sprays and then their volume ratios. The algorithm is validated by simulations, and results show that the volume mixing ratios in mixtures of both two and three sprays can be determined with an accuracy within 5% in the interrogated region from 20% to 70%. The mixing ratios of mixtures of two sprays (water and 30% ethanol, water and ethanol) and three sprays (water, 30% ethanol and ethanol) are also experimentally determined. This technique proposes and demonstrates an effective approach to diagnosing mixtures of multiple sprays.
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