Critical Injection Velocities for Ignition.
Abstract
Forcible injection of combustible material into a closed volume of air can increase its temperature substantially either by molecular impaction on a blunt face of an object or by its kinetic energy loss on sudden deceleration. Injection velocities required to produce ignition temperatures by each mechanism have been computed for a variety of combustible and explosive materials. The two diverse methods of computation are in rough agreement, with representative velocities for ignition being perhaps 1,000 m/s or somewhat less, corresponding to Mach numbers of about 2 1/2. Injection velocities required for the prompt initiation of the explosion of an explosive fuel are rather comparable, and delayed initiation can occur with somewhat lesser velocities. Calculations are all speculative in nature, but they provide a solid basis for comparison of fuels and for subsequent refinement by data from experimental results. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1978
- Accession Number
- ADA057748
Entities
People
- G. F. Kinney
- R. G. S. Sewell
Organizations
- Naval Air Weapons Station China Lake