Simple Methods of Calculating Airfoil Section with Given Pressure Distribution

Abstract

Simple methods of calculating the form of airfoil section with a given pressure distribution have been developed. In the design of axial flow type pumps and blowers, suitable airfoil profiles which revealed good characteristics in the wind tunnel tests are applied, but it is desirable to modify the section form because interference effect due to cascade arrangement changes the characteristics. In such case the two methods explained in this paper are useful as the profile form can be calculated in a simple way taking the pressure distribution of a suitable airfoil section in a uniform flow. One method is that developed applying the thin airfoil theory of Glauert and the other that based on the theory of wing lattice developed by the present authors. These methods are explained in the following two paragraphs.