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Electric Lift Augmentation of Scient...

Kenny, Nicholas I.

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Electric Lift Augmentation of Scientific Balloons Using Gossamer Blades.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Electric Lift Augmentation of Scientific Balloons Using Gossamer Blades./
作者:	Kenny, Nicholas I.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
面頁冊數:	157 p.
附註:	Source: Dissertations Abstracts International, Volume: 85-06, Section: B.
Contained By:	Dissertations Abstracts International85-06B.
標題:	Aerospace engineering. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30812537
ISBN:	9798381162820

Electric Lift Augmentation of Scientific Balloons Using Gossamer Blades.
Kenny, Nicholas I.

Electric Lift Augmentation of Scientific Balloons Using Gossamer Blades. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 157 p.

Source: Dissertations Abstracts International, Volume: 85-06, Section: B.

Thesis (Ph.D.)--University of Colorado at Boulder, 2023.

This item must not be sold to any third party vendors.

Balloons have been used for studying the atmosphere for centuries, offering the unique benefit of enabling low cost observations in regions of the atmosphere that are otherwise difficult to access. Nonetheless, long-duration ballooning can still be prohibitively expensive, particularly for campaigns aiming to conduct routine flights across the globe. The application of gossamer propeller blades, made of string and fabric-like material and tensioned through centripetal forces, opens the door for inexpensive, long duration, targeted observations with hand-launched weather balloons, but also remains scalable to balloons of other sizes.After achieving static stability of a gossamer blade in atmospheric conditions through a unique rigging method called the 4-bar link, manipulation of the blade geometry via string length adjustments can induce billow in the blades, producing lift by increasing their angle of attack and camber. This augments the lift of the balloon system aerodynamically rather than via changes in buoyancy. Scaled testing has been conducted verifying the stability of the 4-bar link and collecting preliminary lift and drag data from the gossamer blade using optical methods without direct force measurement.Results from the scaled experiments have been applied to models exploring the design of a full scale lift augmentation system and the impacts such a system could have on various types of balloon missions. The 4-bar link enables stability in a gossamer structure without any traditional stiffening methods and establishes a baseline for future work on gossamer propellers and flexible wing structures.

ISBN: 9798381162820Subjects--Topical Terms:

1002622
Aerospace engineering.
Subjects--Index Terms:

Balloon control

Electric Lift Augmentation of Scientific Balloons Using Gossamer Blades.
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245 1 0 $a Electric Lift Augmentation of Scientific Balloons Using Gossamer Blades.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2023
300 $a 157 p.
500 $a Source: Dissertations Abstracts International, Volume: 85-06, Section: B.
500 $a Advisor: Lawrence, Dale.
502 $a Thesis (Ph.D.)--University of Colorado at Boulder, 2023.
506 $a This item must not be sold to any third party vendors.
520 $a Balloons have been used for studying the atmosphere for centuries, offering the unique benefit of enabling low cost observations in regions of the atmosphere that are otherwise difficult to access. Nonetheless, long-duration ballooning can still be prohibitively expensive, particularly for campaigns aiming to conduct routine flights across the globe. The application of gossamer propeller blades, made of string and fabric-like material and tensioned through centripetal forces, opens the door for inexpensive, long duration, targeted observations with hand-launched weather balloons, but also remains scalable to balloons of other sizes.After achieving static stability of a gossamer blade in atmospheric conditions through a unique rigging method called the 4-bar link, manipulation of the blade geometry via string length adjustments can induce billow in the blades, producing lift by increasing their angle of attack and camber. This augments the lift of the balloon system aerodynamically rather than via changes in buoyancy. Scaled testing has been conducted verifying the stability of the 4-bar link and collecting preliminary lift and drag data from the gossamer blade using optical methods without direct force measurement.Results from the scaled experiments have been applied to models exploring the design of a full scale lift augmentation system and the impacts such a system could have on various types of balloon missions. The 4-bar link enables stability in a gossamer structure without any traditional stiffening methods and establishes a baseline for future work on gossamer propellers and flexible wing structures.
590 $a School code: 0051.
650 4 $a Aerospace engineering. $3 1002622
650 4 $a Atmospheric sciences. $3 3168354
650 4 $a Engineering. $3 586835
653 $a Balloon control
653 $a Gossamer blade
653 $a Propellers
653 $a Static stability
653 $a Atmospheric conditions
690 $a 0538
690 $a 0725
690 $a 0537
710 2 $a University of Colorado at Boulder. $b Aerospace Engineering. $3 1030473
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792 $a 2023
793 $a English
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