Accession Number:

ADA128566

Title:

Preliminary Investigation of Aluminum Combustion in Air and Steam.

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1983-03-01

Pagination or Media Count:

124.0

Abstract:

The goal of the experiment is to understand the role of metal-steam combustion in the explosion of underwater shaped charges. An apparatus was constructed to investigate combustion of aluminum in steam. For background information, aluminum wires 1 mm diameter, 50 mm length were ignited in air by high current 480 amperes. Tests in air and steam were photographed using 35 mm color slides and 16 mm movies 4300 framessec. Two types of diffusion flames associated with the complete wire were observed, one type of diffusion flame has diffuse pale blue radiation centered on the wire, and another type of flame had intense yellow radiation above the wire. Also, radiation from the wires was measured using Photomultiplier Tubes. Ejected aluminum particles exhibit different combustion properties depending on the environment, air of steam. Particles in air attain velocities of 7 to 11 meterssecond and exhibit erractic trajectories before burn out. Particles in steam move at slower speed 2 to 4 msec the particles burn out and re-ignite. Author

Subject Categories:

  • Metallurgy and Metallography
  • Ammunition and Explosives
  • Underwater Ordnance
  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE