THERMODYNAMICS OF SHOCK COMPRESSED LIQUIDS

摘要

A new computing method for evaluation of thermodynamic parameters of a shock compressed organic material is developed. The method is centered around determination of the whole set of the functions of state for dynamically compressed substance on the base of the experimentally determined initial parameters and generalized equation of the shock adiabat. The computing procedure consists of integration of a system of differential equations in partial derivatives for temperature, specific heat and entropy along a pair of closely spaced Hugoniots in u-T coordinates assuming partial velocity, u, the independent quasi-thermodynamic variable. This assumption drastically simplifies the integrating procedure in comparison with the method by P. Lysne and D. Hardesty developed in the beginning of 70-s. Specially studied are the initial relations dU/du and dT/dp on the Hugoniot. The method is verified by computing thermodynamic parameters of the shock compressed nitromethane.