Detonation-Flame Arrester Devices for Gasoline Cargo Vapor Recovery Systems.
Abstract
An experimental program was carried out to (1) develop empirical data on the deflagration-to-detonation run-up distance for flowing mixtures of gasoline and air in 15.2-centimeters- (6.0-inches-) diameter piping simulating a vapor recovery system, and (2) evaluate the quenching capability of eight selected flame control devices subjected to repeated stable detonations. The deflagration-to-detonation run-up distance was found to be 11.2 m (36.7 ft), or a length-to-diameter ratio of 74. The relative roughness of the run-up length of piping was 0,010 to 0.015. The stable detonation downstream of the transition point has a velocity of 1800 m/s (5906 ft/s) with a stable peak pressure of 1900 kn/m2 to the 2nd power (275 psia). There appeared to be no discernable correlation between the initial flow velocity used in testing and the resulting run-up distance. Detonations were obtained only at equivalence ratios greater than 0.8; however, there was no correlation between equivalence ratio and run-up distance for equivalence ratios ranging from 0.9 to 1.4. The successful detonation-flame arresters were: (1) sprial-wound, crimped aluminum ribbon, (2) foamed nickel-chrome metal, (3) vertically packed bed of aluminum Ballast rings, and (4) water-trap or hydraulic back-pressure valve.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1980
- Accession Number
- ADA086061
Entities
People
- P. R. Ryason
- R. A. Bjorklund
Organizations
- Jet Propulsion Laboratory