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- Type of Document: M.Sc. Thesis
- Language: English
- Document No: 46916 (58)
- University: Sharif University of Technology, International Campus, Kish Island
- Department: Science and Engineering
- Advisor(s): Moosavi, Ali
- Abstract:
- This project studies the effects of different blade and different velocity fields on reducing drag coefficient. A numerical simulation was set up for a circular cylinder to represent the effects of blade on reducing drag. In this study, velocity, density and the cylinder diameter were constant and different viscosities were selected for different regime flows. The computational fluid dynamic programmer FLUENT was used to simulate results for this project. Arrays of cylinders were set up to see the changes in velocity profiles and drag coefficients for a range of Re. In this study, I studied three cases of setting up blade and concentrated on friction drag coefficient and pressure drag coefficient in various Reynolds numbers (40, 100, 500, 4000 and 8000). In the first case, the length of blade and degree of locating are constant and number of blades is different. In the second case, the number of blade (4 blades) and density of blade are constant and length of blades is different. In the third case, the number of blades (2 blades) and density of blades are constant and length of blades is different. At the end, I found that the highest decreasing in the drag coefficient is achieved at 2blade 2D equal to 57%. As the outcome of this project, it is recommended that further research should be carried out on effects of blade size and density of blades on flow patterns to achieve the maximizing decreasing in drag coefficient
- Keywords:
- Drag Coefficient ; Simulation ; Drag Reduction ; Blade ; Pressure Drag ; Viscous Drag
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