Modification of the User Friendly Thermodynamic Code to Include the Effects of Minor Species
Abstract
Three year ago, a user friendly thermodynamic code was developed at Picatinny Arsenal for the personal computer. This code enabled the engineer to calculate the flame temperature of a new propellant formulation on a personal computer thus eliminating the need for access to a mainframe computer. The new code uses the highly accurate equation of state for propellant gases developed by Powell, Wilmot, Haar and Klein and does not rely on the two term virial expansion employed in BLAKE and the ICT codes. This equation of state was developed to accurately calculate the pressure of mixtures of water, carbon monoxide, carbon dioxide, hydrogen, and nitrogen but was not designed to take into account the contributions of minor species. As a result, the effects of all minor species were described in a very approximate way. This defect in the code has now been removed. For many minor species which are predicted to occur in a propellant gas after combustion the equation of state parameters are not known. Both BLAKE and the ICT codes assign generic parameters to all of these minor species. Second and third viral coefficients are then calculated and used in their virial expansion.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1991
- Accession Number
- ADA233929
Entities
People
- T. Valdimiroff
Organizations
- United States Army Armament Research, Development and Engineering Center