高雷诺数实验室湍流环境下液滴的惯性聚簇效应

Water droplets are introduced via four spray nozzles, with the resulting size distribution being quite broad ( ¯ d = 22 μm, ¾d = 13 μm). Downstream, a Phase Doppler Interferometer (PDI) (15) simultaneously measures the diameter (di), downstream speed (vi), and arrival time (ti) of any droplets that traverse its view volume (which has a linear dimension of roughly 150 μm). The PDI system was built and calibrated by Artium Technologies, Inc. and is designed for in situ measurement, such that the instrument does not disturb the flow through the measurement volume when aligned parallel to the mean flow.