In order to properly analysethe operation of a two-level multichannel cyclone,a studyon how air flow moves inside the cyclone is necessary. The two-level multichannel cyclone is designed to separate solid particles from the air stream andhas been built in the Environmental Protection Laboratory at Vilnius Gediminas Technical University. Researches on findinghow theair flow distributes withintwo levels and channels of the six-channel cyclone were made. Air velocity was measured using multimeter Testo–400 and dynamic Pito tube. Air velocity measurements in ducts before and after thedevice were done using an anemometer. The results showed that the air volume at both cyclone levels wereequal, and air velocity inthe channels that werethe same at both levels was also distributed equally. The highest air speed was measured at the end of the last IV channel and reached 13 m/s. Minimum air velocity can be observed when the rings are arranged in such way that 75% of the air flow returns to the previous channel, and the maximum speed is when the previous channel returns 25% of the air flow.

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