在“钻石背”形翼几何外形及设计参数的基础上,选用NACA6411翼型,建立二维计算模型进行数值模拟,研究前后翼垂直高度差∆H对低雷诺数下“钻石背”形翼气动特性的影响。结果表明,采用TransitionSST湍流模型所得结果具有高的准确性和可信性;△H对气动特性的影响,在前后翼前缘间距约为前翼弦长的1.5倍附近,出现变化趋势反转的现象;优化气动布局的有效方法之一是合理选取△H和前后翼梢弦前缘间距d的设计值,在计算范围内,取∆H=22mm和d=100mm,既能达到优化效果,又便于工程实际应用。

Based on geometry and design parameters of "diamond back" wing, influence of vertical height difference of the anterior and posterior wing aerodynamic characteristics at low Reynolds number were simulated by two-dimensional computational model which use NACA6411 airfoil. The simulation results indicate that the Transition SST turbulence model high accuracy and creditability in solving flowing around an airfoil at low Reynolds number; Near the station of leading edge distance between the anterior and posterior wing is about 1.5 times that of chord length of anterior airfoil, the influence of vertical height difference aerodynamic characteristics appear the phenomenon that change trend reversal; One of effective optimization methods for “diamond back" aerodynamic configuration is designing the vertical height difference and the leading edge distance between the tip chord of the anterior and posterior wing rationally, if these values are 22 mm and 100 mm, it both can achieve optimization and is convenient for engineering application.