Computations of the Shock Waves at Hypersonic Velocities Taken into Account the Chemical Reactions that Appear in the Air at High Temperatures.

Autor: NICULESCU, Mihai Leonida, COJOCARU, Marius Gabriel, PRICOP, Mihai Victor, PEPELEA, Dumitru
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Zdroj: INCAS Bulletin; 2015, Vol. 7 Issue 3, p129-133, 5p
Abstrakt: The temperature in the nose region of a hypersonic vehicle can be extremely high, for example, reaching approximately 11 000 K at a Mach number of 36 (Apollo reentry). The bow shock wave is normal, or nearly normal, in the nose region of a blunt body, and the gas temperature behind this shock wave can be enormous at hypersonic speeds. In this case, the assumption of a calorically perfect nonreacting gas with the ratio of specific heats β of 1.4 gives an unrealistically high value of temperature. Therefore, the proper inclusion of chemically reacting effects is vital to the calculation of an accurate normal shock wave temperature. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index