A minimum-domain impulse theory for unsteady aerodynamic force with discrete wake. Issue 5 (September 2017)

• Record Type: Journal Article
• Authors: Kang, Linlin; Liu, Luoqin; Su, Weidong; Wu, Jiezhi
• Is Part Of: Theoretical & applied mechanics letters. Volume 7:Issue 5(2017)
• Page Start: 306
• Page End: 310
• Publication Date: 2017-09
• Subjects: Minimum-domain -- Impulse theory -- Discrete wake -- Lamb vector; Mechanics, Applied -- Periodicals; Mechanics, Analytic -- Periodicals; Mechanics, Analytic; Mechanics, Applied; Periodicals; 620.1
• DOI: 10.1016/j.taml.2017.11.003
• Languages: English
• ISSNs: 2095-0349

Abstract

Abstract: We extend the impulse theory for unsteady aerodynamics, from its classic global form to finite-domain formulation, then to a minimum-domain version for discrete wake. Each extension has been confirmed numerically. The minimum-domain theory indicates that the numerical finding of Li and Lu (2012) is of general significance: The entire force is completely determined by only the time rate of impulse of those vortical structures still connecting to the body, along with the Lamb-vector integral thereof that captures the contribution of all the rest disconnected vortical structures.