Numerical study of flow control on an asymmetric beveled trailing edge

Abstract

Abstract The current research aims to numerically study the flow past a beveled trailing edge of the plate in the presence of a control rod. The test model used in the current study is a sharp-faced 2D flat plate of thickness, H and having an asymmetric 60° beveled trailing edge. A control rod of diameter, \(d=0.2 H\) inserted at two different locations (Location (1); \(x/H=\) 0.18, \(y/H=1.0\)) and (Location (2); \(x/H=\) 0.28, \(y/H=0.9\)) behind the trailing edge. A two-dimensional unsteady numerical simulation was conducted at Reynolds number, \({{Re}}_{H}=1.09\times 1{0}^{5}\) based on the plate thickness. The numerical results revealed the vortex formation and vortex shedding mechanism in the wake downstream of the trailing edge with and without control rod. A drag reduction of 4.6% and 5.9% was obtained for location (1) and (2) respectively. The oscillations lift coefficient amplitude decreased for both rod locations in comparison with that for without rod. the CL (rms) value was decreased in around 87% for location (1) and 39.4% for location (2). in compared to the case without control rod. The results showed also that for location (1) the lift force tends to be symmetry on the two sides of the plate. Strouhal number values for the two locations of control rod are less than that for trailing edge without control rod.