CHARTS FOR EQUILIBRIUM ISENTROP EXPANSION OF AIR BEHIND SHOCKS UP TO 50 000 FEET PER SECOND (15.24 KILOMETERS PER SECOND)

摘要

Isentropic state properties - enthalpy, temperature, and density - have been computed for equilibrium air as a function of pressure relative to the respective stagnation-point conditions behind normal shocks for a wide range of velocities and altitudes. The free-stream velocities ranged from 10 000 to 50 000 ft/sec (3.048 to 15.24 km/sec) and the altitudes ranged from 50 000 to 300 000 feet (15.24 to 91.44 kilometers). These isentropic properties with the associated normal shock properties of pressure, temperature, and density were correlated with nonreacting perfect-gas isentropic and normal shock expressions. Charts of the correlation parameters are presented as well as a simple procedure for computing the properties.