| Author: | Kwan, Kam-tim Timmy |
| Title: | Computer aided aerofoil bladed propeller and tubeaxial fan design |
| Degree: | M.Sc. |
| Year: | 1999 |
| Subject: | Fans (Machinery) -- Design Hong Kong Polytechnic University -- Dissertations |
| Department: | Multi-disciplinary Studies Department of Mechanical Engineering |
| Pages: | xvii, 117, [58] leaves : ill. (some col.) ; 30 cm |
| Language: | English |
| Abstract: | This dissertation reports on study of the design approach with computer aided for aerofoil bladed propeller and tubeaxial fan with low pressure rise duty. The use of computer techniques for the fan rotor blade design has been discussed and achieved by using Microsoft Visual Basic Programming with appropriate design theories and approaches, i.e. free vortex law, aerofoil blade element theory, Euler equation and carpet plot, etc.. The application of those theories and approaches have been reviewed and illustrated in this dissertation. Three major types of fan blade profile, i.e. Gottingen Profile, C4 Profile, and Circular- Arc Cambered Plate Profile have been adopted in the design program and the performance of these three type of blade profiles have also been discussed in term of blading efficiency and noise criteria in this dissertation. The prediction of the noise level generated from fan rotor and fan overall efficiency can be calculated by the fan design program. The results of noise and blading performance of the fan rotor are represented in graphical form. The detailed design of the geometry for the rotor blade profiles can be given from the results of the design program. The influences of the choice of aerofoil blade profiles on the noise effect and blading efficiency have been discussed in details. The results of the performances have also been predicted here and compared with the investigation from other investigator. The design examples are available in this dissertation for the illustration of the fan design program. It is also compared with the design from other designer to verify the design from the program. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b14792035.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 7.27 MB | Adobe PDF | View/Open |
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