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Design and Development of a Propeller Blades in order to Produce Lift and Thrust Simultaneously Inspired by the Maple Seed Aerodynamics

Choobtashani, Farid | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57373 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Javadi, Khodayar
  7. Abstract:
  8. Drawing inspiration from natural phenomena can provide simple solutions for creating new inventions. The graceful spinning and aerodynamic properties of maple leaves motivated a study on their rotation mechanics and physics, ultimately leading to the design of a propeller blade inspired by their shape and properties. Given that each maple tree produces thousands of leaves varying in dimensions, an average shape was calculated using digitizer software and Excel. Due to the small size of the leaves, one leaf was selected for 3D scanning. From various sections of the scanned leaf, airfoils were extracted and propellers were designed using SolidWorks software. Observing that these leaves exhibited rotational properties in two-blade and three-blade configurations, we extended the single-blade propeller design to two-blade and three-blade configurations. Additionally, the idea of creating larger-scale versions of these blades emerged and was subsequently designed and constructed. Since these leaves adopt an angle of about 5 to 20 degrees between the rotation plane and the horizontal plane during descent, Inspired by these different angles, two-bladed propellers were designed and manufactured in armed and armless mode. Finally, the production thrust of each propeller was checked in different rounds. A wooden stand and scale were used to measure the thrust. The results showed that with the increase in the number of blades, the amount of thrust always increases, among the angled two-bladed propellers, the most thrust force was produced by the two-bladed propeller with an angle of ten degrees. Also, among the propellers that were a combination of angled arms, the most thrust force was produced by the propeller with an angle of fifteen degrees. In addition, the effect of scaling on thrust showed that the scale of this propeller up to scale 2 was favorable for producing thrust force, and scale 3 produced less thrust than scale 2, due to its large size and dimensions
  9. Keywords:
  10. Maple Leaf ; Leading Edge Vortex ; Lift Force ; Thrust ; Autorotation ; Conical Flow ; Scaling ; Propeller Blades

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