The Effect of Contact Resistance on the Initiation of Thermal Explosion by Imbedded Wires.
Abstract
The contact resistance between the hot wire and the exothermic material is incorporated in the thermal ignition model. A new solution to the interface temperature was developed and used in the explosion criterion to predict more accurately the explosion delay time. The new solution is derived for variable current heating as well as for constant current heating. Use of the solution is illustrated and compared with other solutions of the problem of D.C. heating a wire in perfect contact with exothermic material. It was found that for values of H (the outer conductivity of the surface of the wire) between infinity and 0.1, the change in the explosion delay is minimal. By decreasing H further, the explosion delay time increases considerably. Use of the solution for variable current heating is also illustrated in another example. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1982
- Accession Number
- ADA120609
Entities
People
- M. S. Mahmoud