Determination of the drag coefficient of lattice structures under wind load using porous media approach

The power transmitters, guyed masts and other lattice structures are exposed to wind action. aerodynamic forces acting on tall tower constructions have crucial importance the stability of structure. structure drag coefficient determination is subject international standards ESDU 81027 81028 Eurocode 3 Part 3.1, but it can also be determined by numerical methods. For that purpose modelling using CFD proved both accurate reliable. In this study fluid-flow around segment a transmitter was simulated 3-D model, where geometry approximated with porous having appropriate factor porosity, in order simplify geometry. We used three representative models turbulence, standard k-? RNG Reynolds stress model. Drag values extracted from flow field compared for all studied cases available experimental results tunnel. Simulations were performed four velocities between 10 m/s 30 m/s. supplemented ones obtained artificial neural network. aim show how simple turbulence model coupled analysis