ALE3D Simulation and Measurement of Violence in a Fast Cookoff Experiment with LX-10

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We performed a computational and experimental analysis of fast cookoff of LX-10 (94.7% HMX, 5.3% Viton A) confined in a 2 kbar steel tube with reinforced end caps. A Scaled-Thermal-Explosion-eXperiment (STEX) was completed in which three radiant heaters were used to heat the vessel until ignition, resulting in a moderately violent explosion after 20.4 minutes. Thermocouple measurements showed tube temperatures as high as 340 C at ignition and LX-10 surface temperatures as high as 279 C, which is near the melting point of HMX. Three micro-power radar systems were used to measure mean fragment velocities of 840 m/s. Photonics Doppler ... continued below

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McClelland, M A; Maienschein, J L; Howard, W M & deHaven, M R November 22, 2006.

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We performed a computational and experimental analysis of fast cookoff of LX-10 (94.7% HMX, 5.3% Viton A) confined in a 2 kbar steel tube with reinforced end caps. A Scaled-Thermal-Explosion-eXperiment (STEX) was completed in which three radiant heaters were used to heat the vessel until ignition, resulting in a moderately violent explosion after 20.4 minutes. Thermocouple measurements showed tube temperatures as high as 340 C at ignition and LX-10 surface temperatures as high as 279 C, which is near the melting point of HMX. Three micro-power radar systems were used to measure mean fragment velocities of 840 m/s. Photonics Doppler Velocimeters (PDVs) showed a rapid acceleration of fragments over 80 {micro}s. A one-dimensional ALE3D cookoff model at the vessel midplane was used to simulate the heating, thermal expansion, LX-10 decomposition composition, and closing of the gap between the HE (High Explosive) and vessel wall. Although the ALE3D simulation terminated before ignition, the model provided a good representation of heat transfer through the case and across the dynamic gap to the explosive.

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PDF-file: 1 pages; size: 2.5 Mbytes

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  • Presented at: JANNAF 23rd Propulsion Systems Hazards Subcommittee Meeting, San Diego, CA, United States, Dec 04 - Dec 08, 2006

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  • Report No.: UCRL-PROC-226413
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1018802
  • Archival Resource Key: ark:/67531/metadc837654

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  • November 22, 2006

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  • May 19, 2016, 3:16 p.m.

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  • Dec. 2, 2016, 7:14 p.m.

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McClelland, M A; Maienschein, J L; Howard, W M & deHaven, M R. ALE3D Simulation and Measurement of Violence in a Fast Cookoff Experiment with LX-10, article, November 22, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc837654/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.