Chaltsev M. Development of estimated aerodynamic theory and design of pneumatic conveying systems .

The estimated aerodynamic theory of pneumatic conveying systems is developed and the adjusted methods of engineering calculations are created providing robust analysis and selection of optimal operation modes, reduction of energy expenditure on bulk cargo piping. Being the base of improved methods of estimated aerodynamic of air tube con-veyer the continuity equation, energy balance equation for aerodisperse flows of air-solid particles as well as the equation of hydraulic resistance are worked out. The method, algorithm and software of hydraulic calculation of pneumatic con-veying pipelines are also worked out. The design procedure of pressure loss at aerodisperse flow turn is worked out considering the connection between flow properties and bend parameters. New models of PCS feeder that is small-sized chamber feeders are designed and passed the industrial testing at thermal plants and enterprises of industrial engineering. The dissertation results provided a real annual economic effect on one small-sized chamber feeder of 400 000 UAH. The expected annual economic effect on 10 small-sized chamber feeders makes 4 million UAH. Keywords: pneumatic conveying, bulk material, conveying line, blow tank, pressure loss, critical velocity, calculation methods.