Development of a refined thermal radiation model for gas and liquid fuels

This study evaluates the performance of thermal radiation models in fire safety engineering to enhance their applicability in various fire scenarios, with the goal of developing a refined thermal radiation model for gas and liquid fuels. The research is structured in three parts. The first part assesses the effectiveness of existing thermal radiation models for propane gas fires, using secondary experimental data from previous studies. The findings highlight the necessity of validation with different fuel phases to improve model reliability, noting that only liquid fuels were tested in this study. In the second part, the evaluation extends to liquid pool fires fueled by ethanol and isopropyl alcohol. Through a series of targeted experiments, the accuracy of thermal radiation models is assessed, providing insights into capturing the complexities associated with thermal radiation in liquid fuel fires. The findings of the research’s first and second parts provide an ideal foundation for the development of newmodels that can better capture the complex phenomena of thermal radiation from the flame. Consequently, the third part of the research focuses on the development of a novel thermal radiation model through semi-a priori modelling. By considering the thermal behaviour of both gas and liquid fires, this model aims to improve fuel by utilising fitting data from propane gas fire experiments, as well as ethanol and isopropyl alcohol pool fire tests. The major findings of the study indicate that the single point source model exhibits the best performance for gas and liquid fire scenarios. In addition, the assessment of the new model demonstrates its potential to capture the intricate nature of thermal radiation phenomena. Validation of the new model employs untested experimental and simulation data, comparing it with the single point source model to evaluate accuracy and effectiveness. This research provides valuable insights into thermal radiation modelling, offering tools for researchers and practitioners in selecting appropriate thermal radiation models for fire protection systems. By enhancing the accuracy and reliability of thermal radiation modelling, this study aims to foster the development of safer and more effective fire protection measures.

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