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THE PHYSICAL PROPERTIES OF THE BLAST WAVE PRODUCED BY A STOICHIOMETRIC PROPANE/OXYGEN EXPLOSION

THE PHYSICAL PROPERTIES OF THE BLAST WAVE PRODUCED BY A STOICHIOMETRIC PROPANE/OXYGEN EXPLOSION. by Maura C. Dewey & John M. Dewey Dewey McMillin & Associates Ltd Victoria, BC Canada. MABS22 Bourges, France 2012. Operation DISTANT PLAIN 1966. MABS22 Bourges, France 2012.

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THE PHYSICAL PROPERTIES OF THE BLAST WAVE PRODUCED BY A STOICHIOMETRIC PROPANE/OXYGEN EXPLOSION

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  1. THE PHYSICAL PROPERTIES OF THE BLAST WAVE PRODUCED BY A STOICHIOMETRIC PROPANE/OXYGEN EXPLOSION • by • Maura C. Dewey & John M. Dewey • Dewey McMillin & Associates Ltd • Victoria, BC Canada MABS22 Bourges, France 2012

  2. Operation DISTANT PLAIN 1966 MABS22 Bourges, France 2012

  3. Operation DISTANT PLAIN 1966 MABS22 Bourges, France 2012

  4. Air Blast Time-of-Arrival Detectors (ABTOADS) An array of switches was closed by the primary shock, and the signals sent via a single cable to a recorder Recorder MABS22 Bourges, France 2012

  5. Primary Shock Radius-Time Trajectory Analysis Propane+oxygen Propane only Dewey (2005), J. Phys. D: Appl. Phys., 38, 4245-4251 MABS22 Bourges, France 2012

  6. The Piston Path – Random Choice Method (PP-RCM)G. I. Taylor (1946) MABS22 Bourges, France 2012

  7. MABS22 Bourges, France 2012

  8. Smoke Tracer Trajectory Used as the Piston Path MISERS GOLD 2.445 KT ANFO SURFACE BURST MABS22 Bourges, France 2012

  9. Use of an Arbitrary Piston Path Calculated Shock trajectory Arbitrary Piston Path Observed Shock trajectory Time Radius MABS22 Bourges, France 2012

  10. Use of an Arbitrary Piston Path Calculated Shock trajectory Arbitrary Piston Path . Observed Shock trajectory Time Radius MABS22 Bourges, France 2012

  11. Use of an Arbitrary Piston Path Calculated Shock trajectory Arbitrary Piston Path . Observed Shock trajectory Time Radius MABS22 Bourges, France 2012

  12. Comparison of Observed and Calculated Shock Trajectories Propane/Oxygen ABTOAD Data PP-RCM Calculation MABS22 Bourges, France 2012

  13. The PP-RCM Calculated the Physical PropertiesThroughout the Flow Field Scaled Radius – 2 to 20 m/kg^1/3 at NTP MABS22 Bourges, France 2010

  14. The PP-RCM Calculated the Physical PropertiesThroughout the Flow Field Scaled Radius – 2 to 20 m/kg^1/3 at NTP Scaled Time – 2 to 50 ms/kg^1/3 at NTP MABS22 Bourges, France 2010

  15. The PP-RCM Calculated the Physical PropertiesThroughout the Flow Field Scaled Radius – 2 to 20 m/kg^1/3 at NTP Scaled Time – 2 to 50 ms/kg^1/3 at NTP Stored Properties Hydrostatic Overpressure – OP (atm) MABS22 Bourges, France 2010

  16. The PP-RCM Calculated the Physical PropertiesThroughout the Flow Field Scaled Radius – 2 to 20 m/kg^1/3 at NTP Scaled Time – 2 to 50 ms/kg^1/3 at NTP Stored Properties Hydrostatic Overpressure – OP (atm) Density – ρ(atm) MABS22 Bourges, France 2010

  17. The PP-RCM Calculated the Physical PropertiesThroughout the Flow Field Scaled Radius – 2 to 20 m/kg^1/3 at NTP Scaled Time – 2 to 50 ms/kg^1/3 at NTP Stored Properties Hydrostatic Overpressure – OP (atm) Density – ρ(atm) Particle Velocity – U/a0 MABS22 Bourges, France 2010

  18. The PP-RCM Calculated the Physical PropertiesThroughout the Flow Field Scaled Radius – 2 to 20 m/kg^1/3 at NTP Scaled Time – 2 to 50 ms/kg^1/3 at NTP Stored Properties Hydrostatic Overpressure – OP (atm) Density – ρ(atm) Particle Velocity – U/a0 Calculated Properties Dynamic Pressure, Temperature and Sound Speed MABS22 Bourges, France 2010

  19. Results MABS22 Bourges, France 2012

  20. Data Fitted to Modified Friedlander Equation MABS22 Bourges, France 2012

  21. Overdensity-Time History at 10 m/kg^1/3 MABS22 Bourges, France 2012

  22. Particle Velocity Time History at 20 m/kg^1/3 MABS22 Bourges, France 2012

  23. Integration of the Equation over the Positive DurationProvides Quantities such as Impulse Log-log Plot of Impulse versus Scaled Radius MABS22 Bourges, France 2012

  24. Summary All of the physical properties of a stoichiometric Propane/oxygen explosion have been characterised MABS22 Bourges, France 2012

  25. Summary All of the physical properties of a stoichiometric Propane/oxygen explosion have been characterised It has been demonstrated that a hemispherical blast wave can be fully characterised using a simple ABTOAD array MABS22 Bourges, France 2012

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