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Simulating Firefighting Scenarios in Enclosures

Amiri, Pezhman | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44542 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Farhanieh, Bijan
  7. Abstract:
  8. Fire in enclosures is one of the most important disasters due to the presence of human and physical risks, so, investigation of the firefighting scenarios in this case has much importance. In the present study, novel enclosures fire suppression scenarios are simulated using computational fluid dynamics (CFD). The simulations have two major categories. In the first part, performance of different natural ventilation, positive pressure ventilation (PPV) and negative pressure ventilation (NPV) scenarios, which are new methods in firefighting, are evaluated and compared. In this part, the influence of different parameters like geometry, position of inlet and outlets and fire heat release rate (HRR) is also considered. In the simulations of second part, the possibility of backdraft, which is a common consequence of enclosure firefighting scenarios, is investigated for each scenario. In this part, water spary scenario, composition of water spray and PPV and composition of water spray and NPV,are considered in addition to natural ventilation and mechanical ventilation scenarios.The results can show the advantages and disadvanteages of the scenarios in different conditions anddetermine the possibility of backdraft for each scenario. The results also increase the insight and knowledge of firefighters and help them to use the firefighting tactics properly
  9. Keywords:
  10. Natural Ventilation ; Fire Accident ; Enclosures ; Firefighting Scenarios ; Mechanical Ventilation ; Water Spray ; Backdraft Phenomena

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