File:Viability of Cross-Flow Fan with Helical Blades for Vertical Take-off and Landing Aircraft (IA viabilityofcross1094517391).pdf
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Summary[edit]
Viability of Cross-Flow Fan with Helical Blades for Vertical Take-off and Landing Aircraft
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| Author |
Kwek, Howe Leng |
| Title |
Viability of Cross-Flow Fan with Helical Blades for Vertical Take-off and Landing Aircraft |
| Publisher |
Monterey, California. Naval Postgraduate School |
| Description |
The cross-flow fan (CFF) is a lifting and propulsion device that retains the advantages of a fixed-wing aircraft by using a ducted lift fan. There is no upper limit to the rotor length-to-diameter ratio of a CFF, allowing the device to be installed along the length of the wing or lifting device. The CFF discharged vector can be easily rotated about the fan axis since the fan has no angular requirements, further allowing the capability of vertical take-off and landing (VTOL) by thrust vectoring. CFF possess the potential to propel an airframe to flight; however adequate thrust must be produced by the CFF in order for it to realize VTOL. Conventional CFFs designs with straight blades produce unacceptable noise levels for personal air vehicle operation. It is believed that helical blades could solve the sound pressure level problem and produce more thrust to aid VTOL. Using computational fluid dynamics (CFD) software, ANSYS-CFX, a three-dimensional (3-D) straight-bladed model was validated against previous studys experimental results. A 3-D model with helical blades was constructed to investigate the performance. The analytical results have shown that helical blades could increase the thrust performance of a CFF, and could possibly realize VTOL. Subjects: cross-flow fan (CFF); vertical take-off and landing (VTOL); straight blades; computational fluid dynamics (CFD); ANYSY-CFX; helical blades |
| Language | English |
| Publication date | September 2012 |
| Current location |
IA Collections: navalpostgraduateschoollibrary; fedlink |
| Accession number |
viabilityofcross1094517391 |
| Source | |
| Permission (Reusing this file) |
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, is not copyrighted in the U.S. |
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 22:14, 25 July 2020 |  | 1,275 × 1,650, 71 pages (1.42 MB) | Fæ (talk | contribs) | FEDLINK - United States Federal Collection viabilityofcross1094517391 (User talk:Fæ/IA books#Fork8) (batch 1993-2020 #31997) |
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