Periodic Behavior of Longitudinal Vortices Downstream of an Active Vortex Generators Pair (Characteristics of Conditional Averaged Reynolds Shear Stress by a Rotating X-array Hot-wire anemometer)

Abstract

This paper is focused on the time depended characteristics of Reynolds shear stresses-u'v' and -v'w' of longitudinal vortices downstream of a pair of active vortex generators (AVG) with common flow up configuration. The measurements of Reynolds stresses within the longitudinal vortices are conducted by using a newly developed rotating X-array hot-wire anemometer which can measure full components of turbulent properties. Time depended characteristics of Reynolds stresses are discussed. Also, the production mechanism in the Reynolds shear stress -u'v'and -v'w'transport equation at the final-stage of up-phase is presented.