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Effects of ignition location on flame spread and heat release rates in furniture calorimeter tests of polyurethane foams
Furniture calorimeter tests of polyurethane foam specimens were conducted to compare flame spread and heat release rates in tests that use centre and edge ignition locations. Flame spread and heat release rates were similar during the early portions of tests of specimens of equal width, but later flame spread and heat release rates increased more rapidly in the centre ignition tests. For the same size foam specimens, peak flame areas were approximately 10% larger in centre ignition tests and peak heat release rates were approximately 20% higher in centre ignition tests. In the work described in this paper, the effects of ignition location on flame spread and heat release rates were investigated. Some standard tests, such as CFR 1633 and ASTM E 1590 use edge ignition, while other tests use different ignition locations. In addition, some previous flame spread models for mattresses developed during the CBUF program are based on centre ignition. Therefore, furniture calorimeter tests of polyurethane foam specimens were conducted using both edge and centre ignition locations. Heat release rates were measured using oxygen consumption calorimetry, and flame spread rates were calculated based on video records and infrared temperature measurements. As full-scale tests of the foams were previously conducted under a wide variety of environmental conditions, another objective was to gather full-scale data under a narrower range of environmental conditions. In the following sections, polyurethane foam test specimens used in the full-scale tests are first described, along with the experimental procedure used. Flame spread and heat release rates measured during tests that utilize centre and edge ignition locations will be compared. Implications of these results on the numerical models being developed in this program will also be discussed.
Effects of ignition location on flame spread and heat release rates in furniture calorimeter tests of polyurethane foams
Furniture calorimeter tests of polyurethane foam specimens were conducted to compare flame spread and heat release rates in tests that use centre and edge ignition locations. Flame spread and heat release rates were similar during the early portions of tests of specimens of equal width, but later flame spread and heat release rates increased more rapidly in the centre ignition tests. For the same size foam specimens, peak flame areas were approximately 10% larger in centre ignition tests and peak heat release rates were approximately 20% higher in centre ignition tests. In the work described in this paper, the effects of ignition location on flame spread and heat release rates were investigated. Some standard tests, such as CFR 1633 and ASTM E 1590 use edge ignition, while other tests use different ignition locations. In addition, some previous flame spread models for mattresses developed during the CBUF program are based on centre ignition. Therefore, furniture calorimeter tests of polyurethane foam specimens were conducted using both edge and centre ignition locations. Heat release rates were measured using oxygen consumption calorimetry, and flame spread rates were calculated based on video records and infrared temperature measurements. As full-scale tests of the foams were previously conducted under a wide variety of environmental conditions, another objective was to gather full-scale data under a narrower range of environmental conditions. In the following sections, polyurethane foam test specimens used in the full-scale tests are first described, along with the experimental procedure used. Flame spread and heat release rates measured during tests that utilize centre and edge ignition locations will be compared. Implications of these results on the numerical models being developed in this program will also be discussed.
Effects of ignition location on flame spread and heat release rates in furniture calorimeter tests of polyurethane foams
Ezinwa, John (author) / Rigg, Janel (author) / Torvi, David (author) / Weckman, Elizabeth (author)
2009
12 Seiten, 10 Bilder, 3 Tabellen, 9 Quellen
Conference paper
Storage medium
English
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