Strain Rate Results of the TNO-PML Cook-Off Test with HTPB/AP and PPG/AP/AN Propellants
Abstract
After the first series of Cook-off experiments with strain gauges, the development of the TNO Prins Maurits Laboratory (TNO-PML) Cook-off test continues. A series of new Cook-off experiments has been carried out with newly developed propellants. The results of the temperature measurements are good and give a good idea of the radial temperature distribution inside the cylinder. The first pressure measurement during the Cook-off runaway did not give the result expected. Probably, a coupling device and the blocking of the propellant at its opening led to a signal more than 10 times lower than the burst pressure of the cylinder. An isolation of the caps or the use of porous materials could solve this problem. The strain measurements gave some new promising results. The reproducibility of the signal-form in the last two experiments was good. It can be stated that a higher value of the strain rate is measured if the response of a (Cook-off) reaction is more severe. Quantitative values cannot be given yet, but we hope to confirm and quantify the statement in future. Future experiments with improved pressure measurement coupled to the strain rate will produce a more quantitative value for the severity of an explosive reaction. Together with an attempt to measure the wall velocity of the wall, this will definitely contribute to the validation of Cook-off computer models and problem solving of the Cook-off phenomenon all over the world.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1997
- Accession Number
- ADA332548
Entities
People
- J. H. G. Scholtes
Organizations
- Prins Maurits Laboratorium TNO