Experimental study on combustion characteristics of blended fuel pool fires

Abstract

Liquid–vapor phase equilibrium theories are used to analyze boiling processes of blended fuel pool fires, and the results show that there are two boiling mechanisms (azeotropism and non-azeotropism) for blended fuels compared with single-component fuels. A series of pool fire experiments were conducted to investigate the combustion characteristics of blended fuel pool fires. The experimental results showed that the two boiling mechanisms have different effects on the burning process of the fuel blends. The boiling temperature and composition varied for the non-azeotropic blends during the burning process and remained steady for azeotropic blends. Furthermore, the boiling temperature of azeotropic blends is lower than that of its components and ranges from a specific temperature to the boiling point of the less volatile component. The flame radiant fraction of the azeotropic blend was also relatively constant during the burning process, whereas that of the non-azeotropic blend varied in different stages of the burning process. Heskestad’s flame height model and flame axial temperature distribution model are applicable for pool fires of azeotropic and non-azeotropic blends.

Numerical simulation of forced ventilation fire suppression for wing leading edge pool fires

“…Various grid quantities are chosen to simulate the temperature value at a height of 0.3m for grid independence analysis, as shown in Figure 3-4. Comparison with actual experimental data under similar conditions [6] It can be observed that with an increasing number of grids, the simulated temperature values stabilize. The simulated data closely matches the experimental data when the grid quantity reaches 108000.…”