Effects of cross-sectional aspect ratio of flat plate on flow characteristics

Abstract eng:
This study conducts two-dimensional unsteady laminar simulation and investigates effects of flat plates aspect ratio on the flow field characteristics under the constant Reynolds number based on the plate thickness. The flat plate aspect ratios (t/c, t: plate thickness, c: plate chord length) are set to be 0.01, 0.025, 0.05, and 0.1. The Reynolds numbers based on the plate thickness (Ret ) are set to be 250 (laminar reattachment), and 1, 000 (turbulent reattachment). The results suggest that the effects of t/c can relatively be negligible at Ret = 250. After formation of three-dimensional turbulent structures at Ret = 1, 000, however, the reattachment points move to downstream as t/c decreases. In this Ret , the flow fields characteristics such as instantaneous flow, turbulent kinetic energy, and boundary layer near the leading edge are different depending on t/c.

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