Research on the Low-speed Similarity Principles for Compressor Stator Airfoils

Some design principles in low-speed simulation had been introduced. It was analyzed that there was a linear relationship between blade throat width, maximum thickness-chord ratio and the position of maximum thickness. A maximum thickness model was established to estimate the maximum thickness. In order to verify the applicability of the maximum thickness model, a low-speed airfoil had been performed. The numerical results show that the characteristics of the low-speed airfoil and the non-dimensional velocity distribution are consistent, and the relative error of the peak velocity of the suction surface for judging the applicability of maximum thickness model is only 0.75%, which indicates the accuracy of the model. Using this model to predict the maximum thickness can decrease the number of iterations in low-speed simulation.