Hybrid closed bomb-strand burner for very high pressure burning rate measurements
A hybrid closed bomb-strand burner is described that is suitable for burning rate measurements at pressures in excess of 1 GPa (150,000 PSI). The device is a cylindrical pressure vessel having an internal volume of about 50 cc and a means of extracting up to fifteen electrical or fiber optic signals. The sample is a right circular cylinder 6.35mm in diameter and 10 cm long with an epoxy coating on the outside surface as an inhibitor. The sample fits in a fixture which prevents its motion during the burn and provides mounting points for the diagnostics that detect the arrival of the burning surface. A variety of break wires and ionization probes to trigger the timing electronics have been used. At the burning rates of present interest (less than 1 m/s), the pressure was measured using an external load cell. An experiment consists of a pre-pressurizing the vessel with argon, igniting the sample at one end, and measuring the pressure and the time of arrival at each probe. The average burning rate between wire locations n-1 and n, over the pressure range (P/sub n-1/,P/sub n/), is r/sub n-1,n/ = (x/sub n/-x/sub n-1/)/(t/sub n/-t/sub n-1/), giving a large portion of the burning rate-pressure curve in a single experiment.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6728760
- Report Number(s):
- UCRL-94769; CONF-8610210-1; ON: DE87001357
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
BURNERS
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
CONTAINERS
DATA ACQUISITION SYSTEMS
DESIGN
ELECTRICAL EQUIPMENT
EQUIPMENT
EXPLOSIVES
KINETICS
MEASURING METHODS
PRESSURE VESSELS
PROPELLANTS
REACTION KINETICS
SWITCHES
VERY HIGH PRESSURE