For clarifying the relation between the incident heat flux to fuels and burning rate of fuels in ventilation controlled fires, small scale model fire tests were conducted using methanol, PMMA, and wood as the fuels. Incident heat flux was measured at the ceiling and the floor of compartment. As the results of this study, in ventilation controlled fires it is found that incident heat flux is proportional to AH^<1/2>/A_F and that in case of methanol and PMMA fires, the burning rate m_P, can be estimated by m_P≒q_FA_F/L_V, and in case of wood, by m_P≒1/4(q_FA_P/L_V), where q_F A_F and L_V are incident heat flux to the ceiling of compartment, fuel surface and latent heat of evaporation or gasification.
