Preliminary study on the aerodynamics of parafoils
This project presents a basic wind tunnel investigation on aerodynamics of ram-air parafoils. Previous studies are summarized through detailed literature reviews, and key parameters for a generic parafoil such as airfoil shape, inlet opening cut, arc-anhedral angle, chord and aspect ratio, and cells...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
2016
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| Online Access: | http://hdl.handle.net/10356/66309 |
| _version_ | 1811689708631097344 |
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| author | Song, Yifan |
| author2 | Asst prof. New Tze How, Daniel |
| author_facet | Asst prof. New Tze How, Daniel Song, Yifan |
| author_sort | Song, Yifan |
| collection | NTU |
| description | This project presents a basic wind tunnel investigation on aerodynamics of ram-air parafoils. Previous studies are summarized through detailed literature reviews, and key parameters for a generic parafoil such as airfoil shape, inlet opening cut, arc-anhedral angle, chord and aspect ratio, and cells are identified. A model support mechanism coupled with a 6-component load cell balance system is designed and validated. The aerodynamic characteristics of five ram-air parafoil models at airspeed of 20 m/s, 30 m/s and 40 m/s are obtained by conducting low speed wind tunnel tests in Temasek Lab, NUS. Some necessary flow visualization studies are also performed. Results of the investigations show the inlet opening cut has fewer effects on aerodynamic coefficients. The arc-anhedral wing is able to reduce flow separation from center to wing tip along the span. The troughs on canopy caused by inflation can also weaken the flow separation. With a flap deflection of 12 degrees, an efficiency of about 122% in lift generation and an increase of about 0.61 in coefficient of Uft are found. |
| first_indexed | 2024-10-01T05:52:24Z |
| format | Thesis |
| id | ntu-10356/66309 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:52:24Z |
| publishDate | 2016 |
| record_format | dspace |
| spelling | ntu-10356/663092023-03-11T17:13:51Z Preliminary study on the aerodynamics of parafoils Song, Yifan Asst prof. New Tze How, Daniel School of Mechanical and Aerospace Engineering DRNTU::Engineering::Aeronautical engineering This project presents a basic wind tunnel investigation on aerodynamics of ram-air parafoils. Previous studies are summarized through detailed literature reviews, and key parameters for a generic parafoil such as airfoil shape, inlet opening cut, arc-anhedral angle, chord and aspect ratio, and cells are identified. A model support mechanism coupled with a 6-component load cell balance system is designed and validated. The aerodynamic characteristics of five ram-air parafoil models at airspeed of 20 m/s, 30 m/s and 40 m/s are obtained by conducting low speed wind tunnel tests in Temasek Lab, NUS. Some necessary flow visualization studies are also performed. Results of the investigations show the inlet opening cut has fewer effects on aerodynamic coefficients. The arc-anhedral wing is able to reduce flow separation from center to wing tip along the span. The troughs on canopy caused by inflation can also weaken the flow separation. With a flap deflection of 12 degrees, an efficiency of about 122% in lift generation and an increase of about 0.61 in coefficient of Uft are found. Master of Science (Aerospace Engineering) 2016-03-23T06:53:35Z 2016-03-23T06:53:35Z 2016 Thesis http://hdl.handle.net/10356/66309 en 90 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Aeronautical engineering Song, Yifan Preliminary study on the aerodynamics of parafoils |
| title | Preliminary study on the aerodynamics of parafoils |
| title_full | Preliminary study on the aerodynamics of parafoils |
| title_fullStr | Preliminary study on the aerodynamics of parafoils |
| title_full_unstemmed | Preliminary study on the aerodynamics of parafoils |
| title_short | Preliminary study on the aerodynamics of parafoils |
| title_sort | preliminary study on the aerodynamics of parafoils |
| topic | DRNTU::Engineering::Aeronautical engineering |
| url | http://hdl.handle.net/10356/66309 |
| work_keys_str_mv | AT songyifan preliminarystudyontheaerodynamicsofparafoils |