后掠机翼横流驻波及其谐波研究

使用Mack方法求解三维不可压Orr-Sommerfeld方程（忽略曲率影响）,得到模型在风洞最佳实验条件下空间最大放大率展向波长为4mm。以此为基础,选择大于此波长的具有代表性的展向扰动波长6mm与7mm,计算了这两个驻波及其谐波空间的放大率。研究在整个层流区主导流动的扰动波长及其发展趋势。使用丝网印刷的方式,在后掠机翼前缘添加粗糙带,人工引入6mm与7mm驻波,通过升华法验证了计算与理论分析。

Study on the swept wing crossflow stationary wave and its harmonics

Three-dimensional incompressible Orr-Sommerfeld equation（without curvature effects）was solved using Mack method.The most spatial amplified wavelength of this model is 4mm under the optimal experiment condition.On this basis,the wavelengths of 6mm and 7mm greater than 4mm were selected which are representative,and their stationary waves and harmonics＇ spatial amplification were calculated.The dominating wavelength and its development trend in the entire laminar flow area were investigated.The silk-screen method was used to add artificial roughness on the leading edge to introduce 6mm and 7mm stationary wavelength.Through sublimation method the computation and theory analysis were verified.