The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 27, 2010
Filed:
Apr. 25, 2005
Katsuyuki Nakayama, Hyogo, JP;
Kenji Umeda, Tokyo, JP;
Katsuyuki Nakayama, Hyogo, JP;
Kenji Umeda, Tokyo, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A swirling flow identification apparatus includes an eigenequation calculation sectionand a swirl axis calculation section. The eigenequation calculation section, based on velocity data of a fluid at a coordinate point, calculates an eigenvalue through an eigenequation concerning the coordinate point and the velocity data. The swirl axis calculation section, if the eigenvalue is a complex number, defines an imaginary part of the complex number as a swirl function, calculates a coordinate point providing a local maximum value in the swirl function and defines the coordinate point providing the local maximum value as the position of a swirling axis of a swirling flow in the fluid. With this, even under the presence of another flow or a plurality of swirling flow, the swirling flow can be adequately identified by using the velocity vector at each of node points (coordinate points).