Assessment of the shape of vertical jet fires

摘要: Experiments were carried out on relatively large vertical propane sonic and subsonic exit velocity jet fires (up to approximately 10 m in length 1.5 width). The main geometrical features of (flame shape, width) determined by analyzing infrared images. From the observations visible images, flame boundary was defined as that corresponding a temperature 800 K. Results compared with shapes proposed previous research projects. In present study, data for flames indicated cylindrical shape could accurately describe fire still air. such radiant equivalent diameter volume equal surrounded aforementioned boundary. ratio found be 7. Expressions are predict values width function orifice Reynolds number.