Abstract
Measurement of droplets size and temperature under different conditions by using rainbow technique
Highlights
Droplet evaporation plays a central role in many practical domains including engines, spray drying, inkjet printing, spray coating, agricultural irrigation, and so on [1]
The tracking and capturing of moving droplets remains challenging, the optical diagnostic provides a variety of possibilities to evaluate the droplet temperature and size, such as laser-induced fluorescence (LIF), Phase Doppler anemometry (PDA), morphologydependent resonances (MDRs), and rainbow refractometry [5]
The results demonstrated the accuracy of the rainbow technique in measuring the droplet size and refractive index
Summary
Droplet evaporation plays a central role in many practical domains including engines, spray drying, inkjet printing, spray coating, agricultural irrigation, and so on [1]. Obtain the size and refractive index information simultaneously and accurately It has been a promising optical method applied in droplet measurement. It mainly has three sections, i.e. droplet generation, high-temperature and pressure vessel, and the rainbow imaging system. One can obtain a well-controlled mono-disperse droplet stream with equal space and size by adjusting the frequency of generator and the injection pressure. In this experiment, the frequency and injection pressure is equal to 28.73 kHz and 1.2 bar, respectively for three pinhole size of 50, 75 and 100 μm. The measurement volume spans the vertical distance 35-42 mm away from the nozzle of droplet generator
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