论文信息 - Testing basic performance of a very small wind turbine designed for multi-purposes

Testing basic performance of a very small wind turbine designed for multi-purposes

A very small wind turbine system for multi-purposes was developed and its performance was reported in this paper. The rotor diameter of the turbine is 500mm. The tests of the energy output, turbine speed, power coefficient, and torque of turbine were carried out for a wide rage of free stream velocity. The flow around the wind turbine and the influence of the turbulence were investigated with a particle image velocimetry. Experimentally obtained power coefficient was 0.4 in maximum and 0.36 in the rated running condition, respectively. The tip speed ratio corresponding to the optimum driving condition was 2.7. Comparing with the other commercial turbines, the performance was excellent at a slow turbine speed. By the flow visualization and PIV measurement around the wind turbine, the approaching flow velocity and the accelerated flow field passing the blade tip was obtained. It was confirmed that the actual flow passed through the blades was about 20% slower than the ideal flow. Tip vortex shed from the blade tip was also visualized clearly.

[1] J. J. D. van Dam,et al. Strategies for Refining IEC 61400-2: Wind Turbine Generator Systems - Part 2: Safety of Small Wind Turbines: Preprint , 2001 .

[2] I. H. Abbott,et al. Theory of Wing Sections , 1959 .

[3] Jeppe Johansen,et al. Numerical Investigation of Three Wind Turbine Blade Tips , 2002 .

[4] C. P. Butterfield,et al. Current developments in small wind energy conversion systems , 1980 .

[5] Ali Naci Celik,et al. Energy output estimation for small-scale wind power generators using Weibull-representative wind data , 2003 .

[6] P. R Ebert,et al. The near wake of a model horizontal-axis wind turbine , 2001 .

[7] M. Magnusson,et al. Near-wake behaviour of wind turbines , 1999 .

[8] William Hopkins. Small to medium size wind turbines : Local use of a local resource , 1999 .

[9] Theo G. Keith,et al. A simple computational method for performance prediction of tip-controlled horizontal axis wind turbines , 1989 .

[10] David Wood,et al. The near wake of a model horizontal-axis wind turbine—I. Experimental arrangements and initial results , 1997 .

[11] I. Grant,et al. An experimental and numerical study of the vortex filaments in the wake of an operational, horizontal-axis, wind turbine , 2000 .