Blade-Tip Vortex Noise Mitigation Traded-Off against Aerodynamic Design for Propellers of Future Electric Aircraft
نویسندگان
چکیده
We study noise generation at the blade tips of propellers designed for future electric aircraft propulsion and, furthermore, analyze interrelationship between mitigation and aerodynamics improvement in terms propeller geometric designs. Classical with three or six blades a conceptual joined dual-blades are compared to understand effects tip vortices on aerodynamics. The dual is constructed by joining two sub-blades. These operate under same freestream flow conditions similar power consumption. Improved Delayed Detached Eddy Simulation (IDDES) adopted simulation identify high-resolution time-dependent sources around tips. acoustic computations use time-domain method based convective Ffowcs Williams–Hawkings (FW-H) equation. thrust 3-blade 4% larger than classical 8% more 6-blade one, given that they have efficiencies. Blade found emitting broadband noise. Since different geometries, especially tips, introduce deviations vortex development. However, differences small regarding generation. As propeller, both produce much reason increased number leads reduced strength vortices. findings indicate through modification design can be traded-off changed aerodynamic performance.
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ژورنال
عنوان ژورنال: Aerospace
سال: 2022
ISSN: ['2226-4310']
DOI: https://doi.org/10.3390/aerospace9120825