Modeling of the Transient Ignition of a Nonmetal/Oxygen System by Heterogeneous Reaction: Effects of Oxygen Pressure
| Autor: | Walter W. Yuen, Donald Greer, Gary Lin, Coleman J. Bryan |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
Thermodynamics chemistry.chemical_element Autoignition temperature Polyethylene Combustion Oxygen law.invention Ignition system chemistry.chemical_compound Minimum ignition energy chemistry Heat flux Physics::Plasma Physics law Forensic engineering Physics::Chemical Physics Spontaneous combustion |
| Popis: | A theoretical model of the transient ignition of a nonmetallic polymer in a pure oxygen environment was developed and used to assess the safety of an oxygen system under elevated pressure. Results demonstrated that, for a general oxygen system, the ignition temperautre is sensitive to the external heating rate as well as such system parameters as the minimum ignition heat flux and the corresponding minimum ignition temperature. As the oxygen pressure increases, the minimum ignition temperature decreases, until, at a sufficiently high oxygen pressure, spontaneous ignition occurs. Numerical results generated by the model were correlated with the reported ignition data for polyethylene, Teflon, and nylon. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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