Apparatus and methods for evaluation of energetic materials

• US 8,161,799 B1
• Filed: 09/30/2008
• Issued: 04/24/2012
• Est. Priority Date: 09/30/2008
• Status: Expired due to Fees

• Current Assignee: United States Secretary of the Navy
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Kim, Steven S., Sandusky, Harold W., Gotzmer, Carl, Elliott, Kendall C.
• Primary Examiner(s): Kirkland, III, Freddie
• Application Number:
  US12/287,165
• Time in Patent Office: 1,302 Days
• Field of Search: 73/351.4, 73/351.7
• US Class Current: 73/35.14
• CPC Class Codes: G01N 33/227 Explosives, e.g. combustive properties thereof detecting explosives in air G01N33/0057

Abstract

The invention relates to an apparatus for evaluating energetic materials for ignitability, flamespread, pressure and thermal characteristics, energetic material interaction, and other properties. The invention is directed to an apparatus for analyzing the suitability of energetic materials for interactions with other energetic materials, explosive or non-explosive. The invention includes a vented combustion chamber, an ignition tube and a firing mechanism. The invention also includes methods for using the apparatus. For example, the apparatus of the invention may be used to analyze energetic materials for their use in destroying rubble which may contain explosive material.

Claims

1. An apparatus for evaluating energetic materials, comprising:

a combustion chamber comprising a counterbore and a plurality of instrument ports for attaching a plurality of instruments;

an ignition tube being inserted within the counterbore, the ignition tube comprises an ignition material, a first energetic material, and a burst disk; and

a firing mechanism being threaded into the counterbore,

wherein the combustion chamber is a vented combustion chamber, and

wherein the combustion chamber further comprises a cavity, which includes a second energetic material.

2. The apparatus of claim 1, wherein the plurality of instruments are at least two selected from the group consisting of detectors for temperature, pressure, and heat flux.

3. The apparatus of claim 1, wherein the combustion chamber further comprises a burst port, and wherein a burst seal is affixed to the burst port.

4. The apparatus of claim 1, wherein the second energetic material is explosive mine rubble.

5. The apparatus of claim 1, wherein the firing mechanism comprises a piston and a firing pin.

6. The apparatus of claim 1, further comprising an initiation structure.

7. The apparatus of claim 6, wherein the initiation structure is selected from the group consisting of electrical, pressure, and impact means.

8. The apparatus of claim 6, wherein the plurality of instruments generate data for collection subsequent to activation of the initiation structure.

9. The apparatus of claim 1, wherein the combustion chamber further comprises a translucent window for optical observation.

10. The apparatus of claim 9, wherein the translucent window is accessible for high speed video photography.

11. The apparatus of claim 1, wherein the burst disk is adapted to burst at a desired pressure.

12. The apparatus of claim 11, wherein the burst disk is a steel burst disk.

13. The apparatus of claim 1, further comprising a combustion containment basin.

14. A method of evaluating a first energetic material, comprising:

analyzing data being collected from a plurality of instruments being connected to an apparatus,

wherein the apparatus comprises a combustion chamber comprises a counterbore and a plurality of instrument ports for attachment of the plurality of instruments,

wherein the apparatus comprises an ignition tube inserted within the counterbore where the ignition tube comprises an ignition material, a first energetic material, and a burst disk,

wherein the apparatus comprises a firing mechanism, and an initiation structure, and

wherein the apparatus further comprises a cavity,

which contains a second energetic material.

15. The method of claim 14, wherein the second energetic material is explosive mine rubble.

16. The method of claim 14, wherein the apparatus further comprises a translucent window.

17. The method of claim 16, wherein the data collected comprises high speed video taken through the translucent window.

18. The method of claim 14, wherein upon activation of the initiation structure, a cascade of events occurs, the events include firing of the firing mechanism, ignition of the ignition material, ignition of the first energetic material, and injection of ignited reactants into an interior of the combustion chamber.