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Title:
SMART VORTEX GENERATOR, AND AIRPLANE, SHIPS, AND ROTATING MACHINES COMPRISING THE SAME
Document Type and Number:
WIPO Patent Application WO/2007/077620
Kind Code:
A1
Abstract:
This invention provides a smart vortex generator (1) comprising a body (3), at least a part of which is formed of a shape memory alloy, disposed on the surface of an object such as a main wing in an airplane which, together with fluid flow, forms a boundary. In the body (3), upon exposure to a temperature rise or fall of a fluid, the shape memory alloy undergoes phase transformation to a higher-temperature side stable phase, which is stable on a higher temperature side, and a lower-temperature side stable phase, which is stable on a lower temperature side. By taking advantage of this phenomenon, the body (3) can change its own form to a first form, which can suppress the separation of flow by vortex generation, and a second form which can suppress turbulent flow. The smart vortex generator (1) can exhibit multidirectional properties depending upon a temperature change, can eliminate the need to externally supply energy, has a simple structure, is less likely to cause troubles, and can realize easy repair, maintenance, and mounting to existing wings.

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Inventors:
IKEDA TADASHIGE (JP)
Application Number:
PCT/JP2005/024290
Publication Date:
July 12, 2007
Filing Date:
December 28, 2005
Export Citation:
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Assignee:
UNIV NAGOYA NAT UNIV CORP (JP)
IKEDA TADASHIGE (JP)
International Classes:
B64C23/06; C22C19/03; F15D1/10
Foreign References:
US6427948B12002-08-06
JPH08309671A1996-11-26
JP2005336534A2005-12-08
JPH05215063A1993-08-24
JPH03285038A1991-12-16
JPS63106192U1988-07-08
JPS58158869U1983-10-22
US6105904A2000-08-22
US2764373A1956-09-25
US2740596A1956-04-03
US5058837A1991-10-22
Attorney, Agent or Firm:
OHKAWA, Hiroshi (Nakamura-ku Nagoya-shi, Aichi 02, JP)
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