| Abstract: | An approximate method is given for calculating the pressure on the critical line of a cylindrical edge of an element projecting above the surface of a hypersonic object. Correlations of the pressure distribution in the interference regions are proposed on the basis of the calculations and analysis of the experimental data. Variational problems of finding the form of a leading edge having minimum drag are set up and solved on the basis of the pressure calculation model obtained. The solutions are sought with the use of Pontryagin's maximum principle. The effect on the minimum drag profile of Mach numbers and blunting of the body is analyzed. The advantage of the optimal form of the edge in comparison with a corresponding rectilinear edge is shown.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 3, pp. 3–9, May–June, 1976. |
