Flame spread on inclined surfaces
WebThe same is true for both the flame projection length on the inclined surface (Lf,p) and the flame attachment length (La). The location of flame attachment divides a flame into an... WebThe results show that the flame spread can be divided into three regimes based on oxygen concentration: an unsustained flame spread regime ( Yo ≤ 0.8), a stable combustion regime (0.8 < Yo < 1.3), and an accelerating flame spread regime ( Yo ≥ 1.3), where Yo is the oxygen concentration ratio in mole fraction.
Flame spread on inclined surfaces
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WebOct 13, 2024 · However, for upward spread with certain inclination, radiation will be enhanced obviously due to stretched flame length and increasing radiation configuration … WebJan 1, 2012 · Request PDF Burning of inclined fuel surfaces A detailed study of both flame spread and steady burning at different angles of inclination has been conducted …
WebJun 1, 2024 · In the liftoff region, the flame detaches from the inclined surface and the primary heating mechanism is radiation, which decays gradually along the downstream … WebOct 13, 2024 · Fire propagation and burning characteristics of upward flame spread over flexible polyurethane (FPU) foam board were investigated under coupling effects of pressure and orientation. As a further comparative research of our previous work, three pressures (70, 85 and 100 kPa) and four fuel surface inclination angles (0°, 30°, 60°, 90°;) were …
WebApr 1, 2024 · The position of the flame base front is determined by the sudden drop of solid surface temperature, as shown in Fig. 5 (b). Under horizontal conditions, the solid … WebNov 22, 2016 · Extensive works indicate heat transfer from flame to the virgin fuel through the gas phase is the most significant in downward flame spread over the surface of thin PMMA [6,25]. Thus, convective heat transfer through gas phase is considered the dominant mode of heat transfer in deciding flame spread rate in this study, as reported in previous ...
WebFeb 1, 1976 · The work in this paper aims to clarify the effect of angle on the lateral flame spread over inclined surfaces. PMMA slabs with width ranged from 2.5 cm to 12 cm …
WebDec 10, 2024 · The upward flame spread over an inclined surface is a common phenomenon in the actual fire, however it has received much less attention in previous … how to take out an old windowWebJan 1, 2024 · The flame attachment behaviors over an inclined surface were investigated by a gas burner, and its effects on the temperature, heat flux, and the velocity distribution were explored by the... how to take out blackheadsWebApr 1, 2024 · Fire spread is known to accelerate uphill over inclined surfaces due to an intrinsic coupling between geometry and fire-induced flows, especially when the slope exceeds a critical angle. The fundamental relationships which govern this close coupling, however, are not yet fully understood. how to take out blanks in excelWebAug 1, 2024 · Several studies have showed that trench could accelerate the fire spread, but the inclined surface was the primary cause of the sudden acceleration of fire. Then, Zhang et al. [7], Chen et al. [8], Mendes et al. [9] and Dupuy et al. [10] systematically studied the accelerated mutation behavior of fire spread on solid inclined surfaces. readychatWebA detailed study of both flame spread and steady burning at different angles of inclination revealed the influence of buoyancy-induced flows in modifying heat-flux profiles ahead of the flame front, which control flame spread, and in affecting the heat flux to the burning surface of the fuel, which controls fuel mass-loss rates. Original language. readycheckgo testing programWebAug 1, 2024 · For upward flame spread over inclined surface, flame spread rate increases significantly with fuel in clined angle, mainly due to the increased interaction s … how to take out black hair dyeWebJan 1, 2013 · FireFOAM solver is used to simulate downward flame spread on the surface of a single-wall corrugated board with different inclination angles (0° ∼ −30°), and to … how to take out bmi