Abstract
AbstractThe development and formation of the leading-edge vortices due to the change in the angle of attack, α, and yaw angle, θ, for a unique cross-flow plane at a dimensionless distance of x/C=0.8 from the apex of the stationary delta wing with a sweep angle of Λ=40° were observed using stereoscopic particle-image velocimetry (stereo-PIV). In addition, the experiments were conducted on three different cross-flow planes such as x/C=0.6, 0.8, and 1 using dye visualization to reveal the development of leading-edge vortices over the delta wing. The angle of attack was varied within the range of 7≤α≤17° and the yaw angle was varied within the range of 0≤θ≤8°. The vortical flow structure and loadings toward the wing surface due to the fluctuations and unsteadiness in the flow structure near the delta wing are investigated using time-averaged parameters such as streamlines, contours of vorticity distributions, Reynolds stress correlations, distributions of turbulent kinetic energy, vertical velocity, and RMS o...
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