نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکتری،دانشگاه جامع امام حسین (ع)،تهران، ایران
2 استادیار، دانشگاه جامع امام حسین (ع)،تهران، ایران
3 دانشیار، دانشگاه جامع امام حسین (ع)،تهران، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
This research focuses on enhancing propeller performance, a crucial aspect of avian propulsion systems. The goal is to find a solution that can be applied to various propeller types without altering their original design. The study explores a method to increase the efficiency of wavy edges, inspired by nature. This involves creating an inherent pitch change along a 45.7 cm diameter wooden blade. The investigation uses both numerical and experimental methods. The numerical approach involves simulating a rotating reference frame and solving the Navier-Stokes equations. The stress expressions in the momentum equation are calculated using K-ω-SST method. The analysis has shown good accuracy in estimating performance coefficients compared to the experimental test. The experimental test was conducted in a subsonic wind tunnel. The ratio of the propeller surface to the test section was 0.2, covering a range of the propeller’s functional advance ratio. Data acquisition of torque and thrust coefficient was done using a balance connected to a brushless motor. The results showed an increase in propeller efficiency with certain wavelength values and amplitude, compared to the original propeller. This equates to a 5.5% increase in the advance ratio according to the flight range.
کلیدواژهها [English]
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