NUMERICAL AERODYNAMIC AND AEROACOUSTIC ANALYSIS OF TOROIDAL PROPELLER DESIGNS

Yıl 2024, Cilt: 05 Sayı: 01, 20 - 33, 21.06.2024

Xuan-duc Vu , Anh-tuan Nguyen , Tuong-linh Nha , Quan Chu , Cong-truong Dınh

Öz

Drones have a major drawback which prevents them from being used extensively - the excessive noise they produce. This article presents an optimization process of aerodynamic noise reduction for a novel design called the Toroidal Propeller, which consists of two blades looping together so that the tip of one blade curves back into the other, has been designed by the Aerospace Propulsion Systems (APSs) research team at School of Mechanical Engineering, Hanoi University of Science and Technology. In addition, four toroidal propellers with different curved shapes (pitch) and Number of Blades (NOB) are considered. The objective of this research is to investigate the effects of modifying the geometry design of the Toroidal Propeller on the intensity of blade tip vortex and aerodynamic flow characteristics passing through the blade. The ultimate goal is to decrease blade tip vortex and turbulence produced by the blade, which can help estimate the sound pressure level and minimize it without causing significant performance losses. Based on the outcome results, the models of the four geometry studies are compared in terms of Acoustic Power Level (APL), Surface Acoustic Power Level (SAPL), Thrust, Torque, and Power. In general, the propeller model with NOB of 3 provides the most optimal efficiency in terms of both Thrust and APL. At the output cross-section, the APL dropped from nearly 139 dB to 121 dB, while the Thrust increased from almost 6.2N to 8.7N compared to the first version of the Toroidal Propeller model.

Anahtar Kelimeler

Toroidal propeller, blade number, thrust, acoustic power level

Etik Beyan

This research is funded by the Ministry of Education and Training (MoET) under Project No. B2023-BKA-11

Destekleyen Kurum

Ministry of Education and Training (MoET)

Proje Numarası

B2023-BKA-11

Teşekkür

Ministry of Education and Training (MoET)

Kaynakça

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