The turbulent boundary layer thickness to pipe radius ratio is delta/R = 0. The vortex generators are mounted either in isolation or in a symmetric counter-rotating array configuration on the inside surface of a straight pipe. The geometry and flow parameters varied include angle-of-attack alfa, chordlength c, span h, and Mach number M. The vortex generator is a symmetric airfoil having a NACA 0012 cross-sectional profile. The modelling of symmetric airfoil vortex generators An experimental study is conducted to determine the dependence of vortex generator geometry and impinging flow conditions on shed vortex circulation and crossplane peak vorticity for one type of vortex generator.
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