부산대학교 도서관

In industrial applications, the Big Blaster type air-cannon systems are used for clearing/cleaning bunkers/hoppers and silos of bulk/powder material in cement mills and building material factories, coal thermal power stations, mining industry and ferrous metallurgy, etc. The paper presents some of the research conducted in the field of aerodynamics and the results obtained for these types of mechanical-pneumatic equipment. In terms of the theoretical research, with reference to the law of conservation and transformation of energy of compressible fluids under non-permanent flow state, an analysis was carried out for the gas dynamics phenomenon of blast air stored in a container flowing through an opening, i.e. for the sonic flow rates and time duration of the phenomenon. Also in relation to the theoretical level, the phenomenon is customized for the actual parameters of an air cannon type TP150, featuring a tank capacity of 150 liters, a round discharge opening with DN100 mm and maximum operating pressure of 10 bar. The developed measuring system is based on the data acquisition board which allowed the recording of the dynamic phenomenon of critical discharge and by default the actual pneumatic pulse duration, and the software application for the analysis of the actual pneumatic pulse duration is created in LabVIEW programming environment. [ABSTRACT FROM AUTHOR]