Books by "Mitchel H. Bertram"
2 books found
Results are presented for a study of the pressure and heat-transfer distributions and force characteristics of slab delta wings of 70° sweep at Mach numbers of 6.8 and 9.6 in air and 18 in helium. The wings had cylindrical leading edges and were tested with two different noses. One was sharp in plan view and the other was a tangent sphere with the same diameter as the cylindrical leading edge. Simple approaches to predicting the heat transfer are shown to be successful if the flow pattern peculiar to the angle-of-attack range under consideration is taken into account.
The Correlation of Oblique Shock Parameters for Ratios of Specific Heats from 1 to 5/3 with Application to Real Gas Flows
by Mitchel H. Bertram, Barbara S. Cook
1963
An analytic investigation was made to show the extent of correlation of the exact oblique shock parameters that may be accomplished by means of similarity parameters suggested by approximate theory. The exact theory for the inviscid flow of a perfect gas was calculated for Mach numbers of 1.1 to 40, ratios of specific heats from 1 to 5/3, and angles of attack from 0° to shock detachment. From consideration of the approximate theory and the concept of effective ratio of specific heats, the oblique shock correlations were found to be useful for the rapid calculation of many flow parameters for an equilibrium real gas. Some useful correlations are also given for the case of isentropic expansion around a sharp corner.