Abstract
Radial-axial (centripetal) turbines are widely used in various fields of industry, energy and transport, but their characteristics require improvement, above all increasing the efficiency factor. A differential iterative calculation method is used to calculate the gas dynamic parameters and characteristics of centripetal turbines. The joint operation of a pulsed centripetal turbine and a four-stroke piston engine is examined. The efficiency of the centripetal turbine is strongly dependent on the combination of the turbine’s and piston engine’s geometric features. The study examines the influence of the rotor blades curvature, the ratio of the height of the impeller blades at the outlet to the height of the blades at the entrance, and the number of blades of the impeller and the nozzle device on the turbine efficiency. An approach to the selection of the optimal geometric parameters that provide the highest efficiency of the designed centripetal turbine when it is used jointly with a four-stroke piston engine is proposed.
Published Version
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