Abstract

This paper considers optimum designing of rotating blades of axial fans, which satisfy strength conditions at a tip speed of more than 140 m/s. Due to the high rotation velocities, cast blades lack the required strength; therefore, it is necessary to develop a lightweight design which allows increasing fan rotor speed. Mathematical methods for searching optimum design parameters by optimality criteria are used in this paper. The design obtained in this case will be closest to the optimum design, providing the given design parameters with the selected criterion. The optimum design was searched using the ANSYS software package based on topological optimization. Based on the solution of the optimization problem, the optimum mass distribution of airfoil blade of mine axial fan impeller is obtained. The optimum shape of impeller blade of the axial fan allows increasing the rotor speed and fan capacity by 1,8 times.

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