The Applicability of Two-Equation Turbulence Models in Wind Velocity Prediction

Abstract:

Wind power prediction plays a pivotal role in reducing the wind power’s negative impact on grid and improving the market competiveness of wind energy. The prediction of wind speed is the key procedure of short-term wind power prediction. In this paper, a wind speed predicting approach based on CFD model was employed, and in order to improve the accuracy of the predicted wind speed, the two turbulence models of standard κ-ε model and RNG κ-ε model, which were applied in the computation of flow field, were studied and compared. The result shows that it has high accuracy on simulating the flow field and predicting wind speed by both the standard κ-ε model and RNG κ-ε model, and the precision is a little bit better when RNG κ-ε model is adopted. On the other hand, the convergence is better when standard κ-ε model is adopted.

• Periodical: Applied Mechanics and Materials (Volumes 291-294)
• Pages: 518-521
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.291-294.518
• Online since: February 2013
• Authors: Li Li, Hang Meng, Yi Mei Wang
• Keywords: Turbulence Model, Wind Power Prediction, Wind Speed Prediction

References

[1] .

[1] X. Y. Yang, Y. Xiao and S. Y. Chen, Wind Speed and Generated Power Forecasting in Wind Farm, Proceedings of CSEE, Vol. 25, No. 11, pp.1-5, 2005 (in Chinese).

[2] G. Yiannis, G. Dimitis and P. Vaggelis, Coupling of a Mesoscale Atmospheric Prediction System with a CFD Microclimatic Model for Production Forecasting of Wind Farms in Complex Terrain: Test Case in the Island of Evia, European Wind Energy Conference & Exhibition, (2006).

[3] P. R. Spalart, Strategies for Turbulence Modeling and Simulations, International Journal of Heat and Fluid Flow, Vol. 21 No. 2000, pp.251-263, (2000).

DOI: 10.1016/s0142-727x(00)00007-2

[4] Z. S. Zhang, G. X. Cui and C. X. Xu, Theory and Modeling of Turbulence, Tsinghua University Press, 2005. (in Chinese).

[5] F. J. Wang, Analysis of Computational Fluid Dynamics, Tsinghua University Press, 2005. (in Chinese).

[6] M. Res, Improved Turbulence Model for Computational Wind Engineering, Doctoral Thesis, University of Norttingham, (2000).

[7] L. Li, Y. M. Wang and Y. Q. Liu, Wind Velocity Predicition at Wind Turbine Hub Height Based on CFD Model, Proceedings of International Conference on Materials for Renewable Energy and Environment, (2012).

DOI: 10.1109/icmree.2013.6893695