Transport Properties and Thermodynamic Processes for Liquid Fuels and Gas Mixtures of N2, O2, H2 and H2O.

摘要

This report deals with problems of transport properties in gas dynamic flows at high pressures and densities and, in particular, with transport properties of Hydrogen, Nitrogen, Water and Oxygen. The behavior of these substances at high pressures and/or low temperatures is quite different from perfect gas behavior. Especially near its critical points or lines of phase changes, thermodynamic properties, equations of state and transport properties as well exhibit proper characters while the specified conditions are taking place. An overview of models in use to predict the transport properties for the species given above in various phase states is carried out and different theoretical approaches are investigated. A generalization of the models requires the knowledge of all these properties in the widest possible range of temperatures and pressures. Therefore, the inclusion of limiting states data (dilute gas, saturation and melting regime) into a multi-property analysis is essential, especially while extending these correlations beyond the range of experimental data. A novel method for the prediction of viscosity and thermal conductivity on the basis of an unique equation for gas and liquid is presented which bases on the model of effective kinetic diameter of hard spheres. Furthermore, the kinetic effects on the droplet surface under high ambient temperature are considered. Temperature and concentration jumps were used to describe non-equilibrium boundary conditions on an evaporating liquid oxygen (LOX) droplet. The influence of calculation errors on the values of these jumps is evaluated.