Fundamental Performances of a Multi-fan Type Active Controlled Wind Tunnel with an Embedded System and a Wind Turbine

Abstract

The paper describes a new active controlled multi-fan wind tunnel with cost reduction to generate natural turbulence wind. We plan to use it for measuring wind turbine performance in laboratory. The wind tunnel is consisted of 100 driving fans that is controlled by an original ICT embedded system. The fluctuating velocity wind is successfully generated with mean velocity 7m/s, turbulent intensity 2% and turbulent integral scale 5, 10, 20m, which is based on Karman’s power spectrum density function. In particular, the wind is well satisfy the Kolmogorov’s -5/3 multiplication rule of inertial subrange with frequency 0.01~2.0Hz. Furthermore, performance of a wind turbine in steady and natural winds is shown as example of usage of the wind tunnel.