A Data Reduction Program for Hotshot Tunnels Based on the Fay-Riddell Heat-Transfer Rate Using Nitrogen at Stagnation Temperatures From 1500 to 5000 K

Abstract

A method is set forth for the computation of test-section, aftershock, and stagnation conditions in hotshot tunnels of Arnold Engineering Development Center, using nitrogen at stagnation temperatures from 1500 to 5000 o K. The basic input data are the stagnation pressure in the res2rvoir, the pitot pressure be~ind a normal shock, and the heat-tran.-3fer rate at the stagnation point. The value of the overall enthalpy is adjusted by numerical iteration until the measured and computed heat-transfer rates are numerically equal within a prescribed tolerance. PUBLICATION REVIEW This report has been reviewed and publication is approved.

Combined Effects of Viscous Interaction and Ideal Source Flow on Pressure and Heat-Transfer Distributions Over Hemisphere Cylinders at Mach 18

“…These data and the measured reservoir pressure were used to calculate the remaining flow conditions as described in Ref. 12. A discussion of the method of calculating reservoir conditions is given in Ref.…”