Freely expanding detonation products: Scaling of rate processes

Conference · Fri Jan 01 00:00:00 EST 1988

OSTI ID:5004381

Greiner, N R

Using the Los Alamos reactive hydrodynamics code KIVA, calculations have been made to simulate the free expansion of cylinders of detonation products into a high vacuum. The emphasis of this paper is on the scaling of rate processes with cylinder size and initial conditions as a function of position in the expanding mass. The processes considered include diffusion, unimolecular decomposition, biomolecular radical reactions, and vibrational relaxation. The calculations also give time-dependent velocity fields; schlieren images; and profiles of density, pressure, and temperature. Many features of the calculations can be compared with experimental observations, including time-delayed schlieren and shadowgraph snapshots, time-dependent absorption spectra, and time-of-arrival profiles of molecular species. Some unexpected insights, such as the effect of the equation of state on the shape of the expanding plume and the effect of position on the rate of quenching, are discussed. These calculations are being used to interpret the available experimental data and to design future experiments. 6 refs., 13 figs.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5004381
• Report Number(s): LA-UR-88-963; CONF-880693-1; ON: DE88007827
• Resource Relation: Conference: 19. international ICT conference on combustion and detonation, Karlsruhe, F.R. Germany, 29 Jun 1988
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
COMBUSTION PRODUCTS
EXPANSION
DETONATIONS
HYDRODYNAMICS
PETN
CHEMICAL REACTIONS
COMPUTERIZED SIMULATION
CYLINDERS
DENSITY
DIFFUSION
EQUATIONS OF STATE
FLUIDS
K CODES
PLUMES
PRESSURE EFFECTS
RADICALS
SCALING LAWS
TEMPERATURE EFFECTS
TIME DEPENDENCE
VELOCITY
CHEMICAL EXPLOSIVES
COMPUTER CODES
EQUATIONS
ESTERS
EXPLOSIVES
FLUID MECHANICS
MECHANICS
NITRATES
NITRIC ACID ESTERS
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SIMULATION
450100* - Military Technology
Weaponry
& National Defense- Chemical Explosions & Explosives