Experimental study on aerodynamic coefficients of yawed cylinders. (April 2015)

• Record Type: Journal Article
• Authors: Hoang, Manh Cuong; Laneville, André; Légeron, Frédéric
• Is Part Of: Journal of fluids and structures. Volume 54(2015:Apr.)
• Page Start: 597
• Page End: 611
• Publication Date: 2015-04
• Subjects: Aerodynamic coefficients -- Yawed cylinders -- Independence Principle; Fluid-structure interaction -- Periodicals; Fluid mechanics -- Periodicals; Structural dynamics -- Periodicals; Structural analysis (Engineering) -- Periodicals; 620.106
• DOI: 10.1016/j.jfluidstructs.2015.01.002
• Languages: English
• ISSNs: 0889-9746

Abstract

Abstract: This paper presents wind tunnel tests on a stationary cylinder inclined with the flow. The cylinder was positioned at different sets of yaw and vertical angles. The flow regime of the tests remained in the subcritical state. Two load cells were designed and installed to measure the aerodynamic forces, with enough sensitivity to measure vortex shedding frequencies. In this paper, the three aerodynamic force coefficients are normalized using the free stream velocity instead of its normal component. The results show that the drag coefficient and the resultant of the lift and side forces coefficients can be described by an empirical function of the incidence angle. The lift and side force coefficients remain however functions of both the horizontal yaw and vertical angles and cannot be expressed as functions of the incidence angle only. The Independence Principle was observed to become inaccurate for yaw angles larger than 40°. However, the measured Strouhal numbers indicate that the vortex shedding frequencies of a yawed cylinder can be predicted using the Independence Principle.