Transactions of Nanjing University of Aeronautics & Astronautics
Special Issue for Wind Turbine
Wake Numerical Simulation of Wind Field Based on Two New Modified Wind Engineering Models
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Abstract:
In combination with the assumption of Park Model that the wake region is in linear expansion and that the cross-wind is in multinomial and Gaussian distribution in wake region, this paper respectively developed the Park-Polynomial Model and the Park-Gaussian Model, to conduct wake flow field numerical simulation study for a single wind turbine. By comparison with the measured data of wind farm and the wind tunnel test, it shows that the prediction precision of wake field has been improved obviously under the modified initial wake radius; both of the newly modified two models could well simulate the wind velocity in wake region, for which not only the accuracy is approximately consistent with the test result, but also the cross-wind distribution conforms to the real flow field. At the same time, the two models have inherited many advantages of engineering models, such as simple form, easy-to-code, and computational efficiency; However, The Park - Gaussian Model is the best in overall performance among them.
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