Methodology for Assessing a Boiling Liquid Expanding Vapor Explosion (BLEVE) Blast Potential Chris P. Keddy NASA Test and Evaluation Contract NASA White Sands Test Facility Las Cruces, New Mexico https://ntrs.nasa.gov/search.jsp?R=20120014185 2018-07-04T21:01:13+00:00Z
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Methodology for Assessing a Boiling Liquid Expanding Vapor ... · Liquid Expanding Vapor Explosion (BLEVE) Blast Potential ... • Boiling Liquid Expanding Vapor Explosion ... X =Vapor
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• Theliquid’sinitialinternalenergy,U1,canbefoundfortheinitialstateusingtablesorgraphs.Sincemosttablesorgraphsonlysupplyh,,andsthevalueofU1 canbefoundfromu=h– p andthesystemmass
Calculated Values are readily available for various compounds(Table Right)Table 6.12 Guidelines for Evaluating the Characteristics of Vapor Cloud Explosions, Flash Fires, and BLEVES, Center for Chemical Process and Safety, American Institute of Chemical Engineers, 1994Shows values of isentropic work Wi expressed as Eex (Energy of Explosion) for a range of temperatures
(Table below)Table 1: Casal, J. and Salla B., “Using Liquid Superheating Energy for the a Quick Estimation of Overpressure in BLEVEs and Similar Explosions”, Journal of Hazardous Materials, Vol. 137, Issue 3, 10-2006, pg 1321-1327SE = Total Superheat Energy of System
ComparisonofVariousFluids
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Casal, J. and Salla B., Using Liquid Superheating Energy for the a Quick Estimation of Overpressure in BLEVEs and Similar Explosions, Journal of Hazardous Materials, Vol. 137, Issue 3, 10-2006, pg 1321-1327
12Guidelines for Evaluating the Characteristics of Vapor Cloud Explosions, Flash Fires, and BLEVES, Center for Chemical Process and Safety, American Institute of Chemical Engineers, 1994