Propeller with High Efficiency and Reduced Noise Emission

Abstract

In modern electronic vertical take-off and landing (eVTOL) multi-rotor aircraft, the air propeller is the main unit required for flight, and therefore the main part of the electricity available on board the machine is used for their operation. One of the main problems with such machines is the short duration of the flight, which is about 20-30 minutes, and the high noise generated by them. These two important problems of these machines, short flight duration, and environmental noise pollution, are directly related
to the efficient operation of propellers.

The article presents the positive effects achieved by geometrical changes in the design of modern propellers and their impact on the technical characteristics of aircraft. Based on the widely used propeller design in practice, we have developed 5 different conceptual propeller designs and both simulation and experimental studies were carried out on them. Research shows that a promising propeller design can achieve up to 15% improved energy efficiency and 5-7 dB reduced noise.