Accession Number:

AD0258553

Title:

SOME METHODS OF GENERATING CYLINDRICAL EXPLOSIONS

Descriptive Note:

Corporate Author:

TORONTO UNIV (ONTARIO) INST FOR AEROSPACE STUDIES

Personal Author(s):

• COLLINS,RICHARD

Report Date:

1960-11-01

Pagination or Media Count:

1.0

Abstract:

Methods were developed for generating cylindrical explosions by bursting pressurized glass cylinders. The cylindrical diaphragms 2 or 4 in. diam are initially pressurized with air or with a combustible gas mixture. The cylindrical blast is produced by breaking the diaphragm with a mechanical breaker or igniting the mixture with an exploding wire and letting the cylinder break due to overpressure. The records include schlieren wave-speed traces of the time-distance plane as well as multi-spark schlieren photographs of the physical plane which can be taken at the equivalent framing rate of up to 250,000 pictures per second. Measurements are made of the rate of decay of the cylindrical shock velocity with time. Comparison with an existing approximate theory by Chisnell J. Fluid Mech., 2286, 1957 shows good agreement except for shock speeds near the origin of the blast. Author

Descriptors:

• *EXPLOSIONS
• *SHOCK WAVES
• AIR
• BLAST
• CONFIGURATIONS
• CYLINDRICAL BODIES
• DIAPHRAGMS(MECHANICS)
• GLASS
• HYDROGEN
• OXYGEN
• PRODUCTION
• SCHLIEREN PHOTOGRAPHY
• SPHERES
• TEST EQUIPMENT

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE