Abstract
The new invention is a nozzle with a pressurized annular slit and a conical cylinder, typically attached to the entrance of a pipe. Pressurized air is forced through the sides of the device into the buffer area and then through the angled annular slit into the pipe. Due to the Coanda effect of annular jet's attaching to the nozzle walls, the flow down stream develops a spiral structure flow. In general, it is felt that this new spiral-flow nozzle has considerable potential for producing more stable and efficient industrial flows. The evolution from discovery to invention through spiral flow researches have been discussed; patent application, research originality guaranteed by patents and liaison for collaboration with company.
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