| Author: | Zhang, Hao |
| Title: | Optimization of aerodynamic performance for a hovering model flapping wing using CFD |
| Degree: | M.Sc. |
| Year: | 2014 |
| Subject: | Micro air vehicles -- Mathematical models. Aerodynamics. Airplanes -- Wings. Hong Kong Polytechnic University -- Dissertations |
| Department: | Faculty of Engineering |
| Pages: | xi, 82 leaves : ill. (some col.) ; 30 cm. |
| Language: | English |
| Abstract: | To investigate appropriate optimization approach for the design of Micro Air Vehicles (MAVs), numerical methods is utilized as an optimization tool by means of three-dimensional time-dependent Navier-Stokes simulation. The commercial CFD code ANSYS/FLUENT is used to simulated the robotic fly wing model in hovering flight at Re=126. The result is compared with the relevant experimental data. In addition, the numerical method is combined with the Taguchi nonlinear optimization method for the purpose to explore an optimization method for the MAVs design. The mean lift is the optimization objectives while the mean drag is treated as optimization constrain. Wing trajectories are chosen as the optimization targets, which are easily operated and processed in the MAVs design. Five typical parameters (flapping frequency, AoA at the midstroke of both upstroke and downstroke, stroke amplitude and rotation types) of trajectories are selected as optimization input factors with four levels of each. Utilizing the orthogonal array, specific CFD cases are arranged and performed. Refer to analysis of range and ANOVA, the most significant influenced parameters, the relative optimal combination and the effect variation trends for each parameters are defined. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b27474987.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 5.71 MB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/7443