Infrared thermographic study of laser ignition

Conference · Mon Jul 21 04:00:00 EDT 1986

OSTI ID:5564283

Mohler, J H; Chow, C T.S.

Pyrotechnic ignition has been studied in the past by making a limited number of discrete temperature-time observations during ignition. Present-day infrared scanning techniques make it possible to record thermal profiles, during ignition, with high spacial and temporal resolution. Data thus obtained can be used with existing theory to characterize pyrotechnic materials and to develop more precise kinetic models of the ignition process. Ignition has been studied theoretically and experimentally using various thermal methods. It has been shown that the whole process can, ideally, be divided into two stages. In the first stage, the sample pellet behaves like an inert body heated by an external heat source. The second stage is governed by the chemical reaction in the heated volume produced during the first stage. High speed thermographic recording of the temperature distribution in the test sample during laser ignition makes it possible to calculate the heat content at any instant. Thus, one can actually observe laser heating and the onset of self-sustained combustion in the pellet.

• Research Organization: Monsanto Research Corp., Miamisburg, OH (USA). Mound; Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5564283
• Report Number(s): UCRL-94741; CONF-860739-14; ON: DE86013582
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450100 -- Military Technology
Weaponry
& National Defense-- Chemical Explosions & Explosives
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700208* -- Fusion Power Plant Technology-- Inertial Confinement Technology
CHEMICAL REACTIONS
COMBUSTION
ELECTROMAGNETIC RADIATION
FUEL PELLETS
HEATING
IGNITION
INFRARED RADIATION
LASER-RADIATION HEATING
MEASURING METHODS
OXIDATION
PELLETS
PLASMA HEATING
RADIATIONS
TEMPERATURE DISTRIBUTION
THERMOCHEMICAL PROCESSES
THERMOGRAPHY