Effective Distance for Vortex Generators in High Subsonic Flows

Vortex generators (VGs) are a passive method by which to alleviate boundary layer separation (BLS). The device-induced streamwise vortices propagate downstream. There is then lift-off from the surface and vortex decays. effectiveness of VGs depends on their geometrical configuration, spacing, flow characteristics. In high-speed regime, must be properly positioned upstream BLS region. Measurements using discrete pressure taps pressure-sensitive paint (PSP) show that there an increase in downstream favorable gradient. effective distance for flat plate presence three VG configurations determined, as height device (conventional micro VGs).