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潮湿的空气连同大雾、下雨天气以及冬天结冰都会引起风力机性能降低。为了研究高湿度对风力机性能的影响,首先利用数据分析了湿空气的密度和黏性属性,评估对发电量的影响。其次,采用数值模拟的方法研究了水蒸气凝结和水汽分压力对翼型和叶片的气动性能影响。研究发现:高湿度空气下,湿气流动及翼型表面水膜的形成对翼型气动性能影响很小,可以忽略不计,然而水汽凝结对叶片结冰及污染有间接效应;空气中有大量液滴的雾天或雨天,阻力增大导致叶片气动性能退化。高温高湿度天气时,密度变化对年发电量的计算不能忽略,叶片结冰和污染物黏结的情况也是需要进一步的研究内容。
Moist air together with fog, rainy weather and icing in winter can cause wind turbine performance to deteriorate. In order to study the effect of high humidity on wind turbine performance, the density and viscous properties of wet air were first analyzed using data to evaluate the impact on power generation. Secondly, the influence of water vapor condensation and water vapor pressure on aerodynamic performance of airfoil and blade was studied by numerical simulation. The results show that the moisture flow and the formation of water film on the airfoil surface have little effect on the aerodynamic performance of the airfoil in high humidity, but the condensation of water vapor has an indirect effect on the icing and pollution of the airfoil. There is a large amount of liquid in the air Drop fogging or rainy days, the resistance increases lead to blade aerodynamic degradation. When the temperature is high and the humidity is high, the calculation of annual power generation by density change can not be neglected. The situation of leaf icing and pollutant bonding needs further research.