ISSN Online: 2377-424X
ISBN Print: 978-1-56700-474-8
ISBN Online: 978-1-56700-473-1
International Heat Transfer Conference 16
HIGH-TEMPERATURE NONEQUILIBRIUM THERMODYNAMIC PROPERTIES OF N2 WITH AN IMPROVED CALCULATION OF ENERGY LEVELS
要約
The level energy is vital to the accurate determination of the partition functions which are required to calculate the thermodynamic properties of N2. However, the level energies calculated by the frequently used Dunham expansion will become inaccurate for high-lying vibrational and rotational levels. In this paper, the potential curves are reconstructed using the Rydberg-Klein-Rees (RKR)
method, which are extrapolated to the dissociation limits by fitting of the theoretical potentials. Solving the rotational dependence of the radial Schrödinger equation over the obtained potential curves, we determine the rovibrational level energies, which are then used to calculate the high-temperature equilibrium and nonequilibrium thermodynamic properties of N2. The internal specific heats in thermodynamic equilibrium are given and compared with the available data in the
literature. In addition, the non-equilibrium internal partition function and thermodynamic properties are also given and discussed based on the two-temperature model. Particularly, the effect of the rovibrational interaction energy on the specific heats is investigated.