VORTEX STRUCTURE ANALYSIS METHOD AND ANALYZER

摘要

PROBLEM TO BE SOLVED: To suppress the fragmentation of a vortex central axis when a pressure cross section minimum gyration method is used.;SOLUTION: A vortex structure analysis method comprises: a first step for executing a pressure cross section minimum gyration method and thereby determining a vortex center point c' in plurality; a second step for determining a vortex axis e₃' extending from each of the plurality of vortex center points c'; and a third step for joining at least some of the plurality of vortex center points c' together and thereby identifying a vortex center axis S formed by linking the vortex center points c' together. In the third step, when, for each of the plurality of vortex center points c', the direction in which a vortex axis e₃' extends from one vortex center point c₀' is oriented is assumed as a positive direction, and the direction that is reverse thereto is assumed as a negative direction, a search is made of a vortex center points c' whose distance to the one vortex center point c₀' is shortest and the searched point is made a candidate for the joining.;SELECTED DRAWING: Figure 6;COPYRIGHT: (C)2019,JPO&INPIT