Perm Journal of Petroleum and Mining Engineering (Sep 2017)
New equation for determination of overpressure of fuel-air mixture blast
Abstract
The problems of assessing the consequences of fuel-air mixtures and their prevention are topical and of practical interest. Such the explosions pose a real danger during processing, transportation and storage of fuels at various industrial and civil facilities. Forecast of possible consequences of explosions of fuel-air mixtures is a key element in development of protective measures. Today, various calculation methods have been developed and approved by different departments and organizations. The authors of the article have previously verified methods of Gosatomnadzor (RB G-05-039-96), Rostechnadzor (RD 03-409-01, PB 09-540-03, Method for assessment of consequences of accidental explosions of fuel-air mixtures, General explosion safety rules for explosive chemicals, petrochemicals and refineries), EMERCOM of Russia (GOST R 12.3.047-98, GOST R 12.3.047-2012, SP 12.13130.2009), Netherlands Organisation for Applied Scientific Research, Dorofeev, Baker-Strehlow and Baker-Strehlow-Tang for prediction of consequences of air-fuel mixture explosions at the example of real explosions. It is established that the detonation regime is best described by the Dorofeev's method and multi-energy method of Netherlands Organisation for Applied Scientific Research (ME-TNO) for deflagration regime. Thus, it is promising to create a synthesis method that could combine approaches of the methods. Detonation mode was picked out using the ME-TNO method and replaced by Dorofeev's method. Such a technique allowed proposing a new equation for predicting explosion pressure of fuel-air mixtures. As a result of the research, a new equation is proposed. An equation allows calculating the overpressure of explosion, which more accurately predicts the consequences of fuel-air explosions at petroleum and gas, petrochemical and chemical industries.
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