典型山地地形风力机气动性能评估及布局探索

AERODYNAMIC PERFORMANCE EVALUATION AND LAYOUT EXPLORATION OF WIND TURBINE IN TYPICAL MOUNTAINOUS TERRAIN

通过数值模拟,对某典型山地地形风切变进行探讨,从风廓线、湍流强度、偏航和地形堵塞4个角度分析ERS-100型风力机在该典型山地地形的性能。结果表明:湍流强度是影响气动性能的重要原因,其中湍流强度增大是导致背风坡性能损失较大(接近50%)的主要因素;只有在靠近山顶处风廓线才接近理想均匀来流,性能损失较小,山脚处性能损失接近30%;安装偏航角较小,对性能影响较小;地形堵塞仅对迎风坡产生影响。

The wind shear in a typical mountainous terrain was explored by numerical simulation. ERS-100 wind turbine was chosen to analyze the performance in the typical mountainous terrain from four respects of wind profile, turbulence intensity, yaw and terrain blockage. The results show that the turbulence intensity is the important factor affecting the aerodynamic performance, the increase of turbulence intensity will lead to the large performance loss of nearly 50% at leeward slope ; only the wind profile near the top of the mountain is close to the ideal uniform flow and loss is lower, but the performance loss is nearly 30% at the foot of hill; the installation yaw angle is small, which has a minor effect on performance ; terrain blockage only impacts on windward slope.