葡萄园水平轴防霜风扇应用研究

Application of Horizontal Axis Anti-frost Fans in Vineyards

为有效防除葡萄园霜冻害,需得到防霜风扇合理的架设方案.基于CFD数值模拟方法,模拟气象逆温,对水平轴防霜风扇不同的架设高度及俯角时葡萄园流场的气流组织进行三维数值模拟计算.结果表明,架设俯角取45°～55°为宜,并根据逆温现象的强弱调节架设高度及俯角,可有效增加防霜风扇的作用效果及作用面积.

An optimum scheme for the erection of an anti-frost fan should be introduced to effectively control and prevent frost in the vineyard. Based on the CFD method,meteorological inversion was simulated to calculate the three-dimensional numerical value of the airflow field of the vineyard when the horizontal axis anti-frost fan had different erecting height and depressions. The results show that the angles of from 45° to 55° are appropriate and the height and angle have to be adjusted to levels of temperature inversion, which maximizes the effectiveness of the anti-frost fan.