太阳能微型无人机气动效率计算方法

Aerodynamic efficiency calculation method of solar powered micro-UAV

针对太阳能-锂电池混合动力微型无人机低雷诺数、巡航速度范围大的问题,对可能使用的翼型进行数据拟合,统计并建立雷诺数与翼型阻力关系函数,得出低雷诺数对气动力影响的计算方法,同时进行尾翼配平阻力计算,修正巡航速度变化对气动力的影响。通过FLUENT仿真及实际飞行测试,验证了该计算方法的可行性。

Aiming at the low Reynolds number and large cruising speed range of solar energy-lithium hybrid battery micro-UAV,data fitting for possible airfoil is conducted;Relation function between Reynolds number and airfoil resistance is built through statistical analysis. Calculating method of the low Reynolds number’s influence on aerodynamic force is obtained. Meanwhile,the influence of corrected cruising speed change on aerodynamic force is calculated through empennage trim resistance calculation. FLUENT simulation and actual flight test prove the feasibility of the proposed method.