Assessment of the use of electric power plants on the propeller-driven aircraft noise
Tóm tắt
The article considers the scheme of performing computational studies in the design of propeller-driven aircraft, taking into account the required acoustic characteristics. Within the framework of this work, the analysis of the influence of the use of electric power plant on the light propeller-driven aircraft noise is carried out on the basis of available publications and author’s research. Two light propeller-driven aircraft Extra 330 and Magnus Fusion 212 were considered, for which flight acoustic tests were performed with a standard piston power plant and an electric one to determine the effect of the use of electric motors on the light propeller-driven aircraft noise community noise levels. Thus, when using hybrid and electric power plant, there will be a significant transformation of the sound field of light propeller-driven aircraft noise and unmanned aerial vehicle. It is worth expecting the dominance of propeller noise (for take-off power condition of the power plant) with a significant influence of installation effects and airframe noise. When flying an aircraft at relatively low altitudes with low speeds, the effect of using electric and hybrid power plant may be insignificant. At the same time, when flying at altitudes from 100 m, one should expect a decrease in the degree of audibility of unmanned aerial vehicle with electric power plants compared to piston ones, due to the significant attenuation of high-frequency noise of electric engines with increasing distance to the aircraft.
Tài liệu tham khảo
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