Abstract:  Experiments of single and two multifunctional massage seats were carried out. The essential parameters of fire spread behaviors, heat release rate, external field temperature and heat flux distribution were analyzed. The main conclusions are as follows: When the single and two seats are burning, the heat release rate experiences two rapid growth stages. The first corresponding peak values are 351， 392 kW, and the second are 572， 968 kW, the fire growth coefficient belongs to the range of slow and medium fire. Before reaching the peak value of heat release rate, the variation of theoretical heat release rate obtained by superposition principle is basically consistent with the experimental data, and the peak of heat release rate is qualitatively similar to the experimental results. The temperature of the fire plume decreases with height, and the attenuation of the fire plume temperature for two seat is slower than that for single seat. The longitudinal temperature of the external field accords with the Gaussian function distribution with the distance from the fire source, and its attenuation coefficient is 2.859. The variation of radiant heat flux experiences two peak values, which is similar to that of heat release rate. The point source radiation model can be used to calculate the external radiant heat flux, but the radiation coefficient should considered as 0.60~0.86 for the fire of multifunctional massage seat.

Key words: seat fire, heat release rate, temperature distribution, radiation model