This paper studies the steady Coanda effect for reducing aerodynamic drag of Chalmers ship model (CSM) using Large Eddy Simulation (LES) with Wall-Adapting Local-Eddy Viscosity (WALE) model. The flow control mechanism is explored, and analysis energy efficiency conducted to evaluate net benefit control. Validating numerical methods, predicted pressure coefficients distribution on baseline CSM a...

In the present study, flow fields generated by a synthetic jet (SJ) were investigated with particle image velocimetry (PIV). The SJ time-averaged parameters, such as velocity, turbulent kinetic energy (TKE), and vorticity, compared using Reynolds number (Re=5000) dimensionless stroke length (L0=2;10). Three different orifice shapes same equivalent diameter used: circle, square, slot. of paramet...

The deep-sea mining vehicle is the main component of undersea exploitation system, which gathers polymetallic nodules with its professionally designed seabed collector. Coandă effect-based collecting method an improved hydraulic that forms adverse pressure gradient over by performing wall jet flow a rounded convex surface. In comparison to circular cylinder surface, effect logarithmic spiral su...

As vane inlet temperatures and turbine loadings are increasing, the aerodynamic thermal management for endwalls of gas turbines have received increased attention. Non-axisymmetric becoming popular due to their proficient capabilities modify secondary flow fields change film cooling performance on endwalls. In this study, by considering interaction between mainstream purge based non-axisymmetric...

We address a challenge of active flow control: the optimization many actuation parameters guaranteeing fast convergence and avoiding suboptimal local minima. This is addressed by new optimizer, called explorative gradient method (EGM). EGM alternatively performs one exploitive downhill simplex step an Latin hypercube sampling iteration. Thus, rate based guaranteed while, at same time, better mi...