Conference
Elevated internal pressures in vented deflagration tests
| العنوان: | Elevated internal pressures in vented deflagration tests |
|---|---|
| المؤلفون: | Thomas, J. K, Kolbe, M, Goodrich, M. L, SALZANO, ERNESTO |
| المساهمون: | Thomas, J.K, Kolbe, M, Goodrich, M.L, Salzano, E. |
| سنة النشر: | 2006 |
| المجموعة: | IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
| مصطلحات موضوعية: | Combustion, Enclosure, Methane, Mixture, Propane, Tubes (components), Vents, Deflagration test, Fuel-air mixture, Internal pressure, Pitch-to-diameter ratio, Predictive method, Pressure constraint, Propane-air mixture, Vertical circular tubes, Testing |
| الوصف: | A set of large-scale vented deflagration tests involving methane-and propane-air mixtures in a congested enclosure has been performed. The enclosure utilized had a 24-foot by 24-foot footprint and a height of 6 feet. Steel plates were attached to the roof and all four sides served as vents. The vent panels weighed 2 lbm/ft2 and were configured to release at 0.3 psig. A regular array of vertical circular tubes provided the congestion for these tests. The tubes were arranged with a pitch-to-diameter ratio of 7.6 and provided area and volume blockage ratios of 13% and 1.5%, respectively. The fuel-air mixture completely filled the congested region in these tests, but did not extend beyond it. The average peak pressures achieved with methane and propane mixtures were 4.0 psig and 5.0 psig, respectively. These pressures are 20 to 40 times the values predicted by the NFPA 68 weak and strong enclosure correlations, respectively, if the constraint imposed by the vent panel release pressure is not explicitly considered. Consideration of the vent panel release pressure constraint increases the predicted pressures to within an order of magnitude of the measured values. On the basis of these tests, it is concluded that NFPA 68 correlations can significantly underpredict the peak pressure achieved in a vented deflagration for an enclosure with moderate congestion levels. This paper also provides comparisons with a simplified predictive method currently under development. |
| نوع الوثيقة: | conference object |
| وصف الملف: | ELETTRONICO |
| اللغة: | English |
| Relation: | ispartofbook:AIChE Spring National Meeting; AIChE Spring National Meeting; firstpage:211; lastpage:223; numberofpages:13; http://hdl.handle.net/11585/526522; http://www.scopus.com/inward/record.url?eid=2-s2.0-84912026731&partnerID=40&md5=7f358f9d4d2f8887c121e36e72d2a20a |
| الاتاحة: | http://hdl.handle.net/11585/526522 http://www.scopus.com/inward/record.url?eid=2-s2.0-84912026731&partnerID=40&md5=7f358f9d4d2f8887c121e36e72d2a20a |
| رقم الانضمام: | edsbas.6892F0E6 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |