Accession Number:

AD0745440

Title:

Aerotherm Graphite Surface Kinetics Computer Program. Volume 1. Program Description and Sample Problems

Descriptive Note:

User's manual

Corporate Author:

ACUREX CORP/AEROTHERM MOUNTAIN VIEW CA

Personal Author(s):

Report Date:

1972-01-01

Pagination or Media Count:

137.0

Abstract:

A Fortran 4 computer code is described which computes thermochemical ablation rates of pyrolytic graphite surfaces, as a function of surface temperature and pressure, assuming all heterogeneous reactions at the surface are kinetically controlled. The calculation of the chemical state at the surface utilizes a film coefficient model which accounts for the unequal diffusion of species. All homogeneous reactions between gas-phase species adjacent to the surface are assumed to be in equilibrium. The specific surface reactions which are taken to be kinetically controlled include the reactions of condensed-phase carbon with water vapor, carbon dioxide, and hydrogen. Several options are available for computation of the boundary-layer edge state required in the diffusion model, including isentropic expansion or compression and normal or oblique shock wave calculation procedures.

Descriptors:

• *ABLATION
• *NOZZLE GAS FLOW
• *PYROLYTIC GRAPHITE
• *REACTION KINETICS
• *ROCKET NOZZLES
• CHEMICAL ELEMENTS
• CHEMICAL REACTIONS
• COMPUTER PROGRAMS
• EROSIVE BURNING
• NUMERICAL ANALYSIS
• SHOCK WAVES
• THERMOCHEMISTRY
• THERMODYNAMICS
• TRANSPORT PROPERTIES

Subject Categories:

• Ceramics, Refractories and Glass
• Computer Programming and Software
• Rocket Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE