Berechnung der reibungslosen Strömung für ein vorgegebenes ebenes Schaufelgitter bei hohen Unterschallgeschwindigkeiten

Summary

A simple approximation method based onPrandtl-Glauert's rule is given for the calculation of inviscous compressible flow through a two-dimensional cascade. It is applicable to cascades of any solidity and stagger angle with blade sections of small thickness and camber. The calculation of compressible flow for a predetermined cascade at a given Mach number is reduced to the calculation of an ‘associated incompressible flow’ through a cascade having blades of the same blade section, a higher solidity and larger angle of stagger. This associated incompressible cascade flow can be conveniently calculated on the basis of a method disclosed byH. Schlichting [2].

Comparison of some computed pressure distributions along the blade contour reveals satisfactory agreement with measurements in the high-speed cascade wind tunnel of the Deutsche Forschungsanstalt für Luftfahrt (DFL; German Research Centre for Aviation), Brunswick.