Theoretical Work about Transonic Flow at the Aeronautical Institute of the Royal Technical University, Stockholm

Summary

This paper covers essentially four areas: airfoil flow and flow past bodies with small aspect ratio, both with and without incidence. It is based on the author’s Integral Equation Method, which was generalized by T. Gullstrand, who has completed work about airfoil flow with and without incidence and has reported about these cases. The author works on flows past bodies with small aspect ratio at zero incidence, where he formulated on equivalence rule that reduces the problem to an axisymmetric one. Recently, first results have been achieved. Small aspect ratio bodies with incidence already were treated by R. T. Jones, but the Institute has certain refinements to this case on its program of activities. There is a well-founded prospect to use the two extreme cases of large (infinite) and small aspect ratio to obtain results for the case of medium aspect ratio by interpolation.

Translated by H. Sobieczky from K. Oswatitsch, „Die theoretischen Arbeiten über schallnahe Strömung am Flugtechnischen Institut der Königlich Technischen Hochschule; Stockholm.“8th Congr. Theor. and Appl. Mech., Istanbul, 1952; also DVL-Ber. Nr. 66 (1958), pp. 15-23.