Abstract
In the pneumatic transportation, the authors propose that the effective and stable feeding of the particles can be attained by inserting the injection pipe at the center of the suction nozzle. In this paper, we examined the effect of extension length on the nozzle performance. As a result, it was found that the nozzle performance can be raised by extending the injection pipe. The various flow patterns particles obtained by different extension length were clarified by the flow visualization near the suction nozzle.
