A physical model of a linear flame front spreading over a pine needle fuel bed was developed in our previous work. The model agrees well with the experimental data on rate of fire spread (ROS) for lower slope angles, while the ROS values are overestimated under higher slope angles. This is possibly due to the overestimate of the radiative heating or underestimate of the convective cooling, caus...

The temperature information is of great significance to the study of flame structure, soot distribution and combustion mechanism. It is also vital to combustion control. This paper presents the design, implementation and evaluation of a flame imaging system based on optical sectioning method to reconstruct the steady state temperature field of candlelight. A 3-D luminous object can be regarded ...

In this study, in-situ bulk polymerization was investigated for obtaining flame retardant polystyrene (PS). The halogenated and phosphoric compounds were used as flame retardant additives and Perkadox 30 was used as a synergist. The flammability of the PS was evaluated by thermogravimetric analyzer (TGA), limiting oxygen index (LOI) and UL-94 tests. The results show that polymerization process ...

where p is the density, cp the specific heat at constant pressure, Su the laminar flame speed, Tb the flame temperature, subscript u the unburned gas and superscript 0 the adiabatic gas, ), the thermal conductivity, 7/= (rp/rR)"2 the weighted nongrayness, rp and rR being the Planck mean and the Rosseland mean of the absorption coefficient, ¢. the wall emissitivity, r = rMI the optical thickness...

Photometric investigations are reported in laminar, preaixed shielded flames above the reaction zone, burning at atmospheric pressure. In these CO/Ng/Og -, CpHg/Np/Op and H^/O /N, flames metal y&por via introduced. Flame temperatures ranged frcn 2000 to 2500 K, rise-velocities from ') to 15 A/sec. The question is discussed as to what extent thermodynamic equilibrium does exist in ! certain part...

-The role which low-temperature catalytic combustion should play in the future hydrogen energy system is discussed in comparison with those of conventional flame-type combustion and fuel cells. A hybrid of catalytic and flame combustion is also referred to in the comparison. Screening of catalyst materials proved that several inexpensive oxides of the 3d transition metals were active at interme...

This work presents a study of non-premixed flames at supercritical-pressure conditions. Emphasis is placed on flame stability in liquid rocket engines fueled with liquid oxygen and gaseous hydrogen. The flame structure sensitivity to strain, pressure, temperature and real-fluid effects was investigated in detailed opposed-jet flames calculations. It is shown that the flame is very robust to str...