T. Poespowati, T. Poespowati and B. Moghtaderi, B. Moghtaderi and B. Z. Dlugogorski, B. Z. Dlugogorski (2001) EFFECTS OF POROSITY ON RE-IGNITION CHARACTERISTICS OF A SURROGATE MATERIAL. EFFECTS OF POROSITY ON RE-IGNITION CHARACTERISTICS OF A SURROGATE MATERIAL.
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Abstract
This study is part of a larger project which aims at studying the re-ignition behaviour of charring solid fuels under fire conditions. The main objective of this part of the work was to investigate the role of material porosity on the re-ignition characteristics of the fuel. For this purpose, experiments were carried out on a set of surrogate ceramic samples to de-couple the pyrolysis and combustion processes from those associated with heat transfer. The surrogate samples were made out of magnesia silica ceramic with porosity levels of 72.9%, 53.5%, and 35%. Experiments were conducted in a modified cone calorimeter over a range of heat fluxes between 40 to 60 kW/m2. The re-ignition delay was found to be significantly affected by the material porosity. The higher the porosity, the longer the re-ignition delay time. For samples having the same porosity level, the re-ignition delay time was primarily a function of sample thickness and the external heat flux. Thicker samples generally showed shorter reignition delays. The results of this study will be used in future work to quantify the impact of porosity on the re-ignition behaviour of real samples.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Re-ignition, porosity, water spray, cone calorimeter |
| Subjects: | Engineering > Chemical Engineering |
| Divisions: | Fakultas Teknologi Industri > Teknik Kimia S1 |
| Depositing User: | Susi Rahmania |
| Date Deposited: | 28 Mar 2019 03:24 |
| Last Modified: | 28 Mar 2019 03:24 |
| URI: | http://eprints.itn.ac.id/id/eprint/3102 |
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