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|Title:||Temperature stratification of heated air flow in a fire tunnel|
|Authors:||Xue, Hong |
|Source:||Xue, Hong,Hihara, Eiji,Saito, Takamoto (1994-02). Temperature stratification of heated air flow in a fire tunnel. JSME International Journal, Series B: Fluids and Thermal Engineering 37 (1) : 187-194. ScholarBank@NUS Repository.|
|Abstract:||The temperature stratification of the heated air flow in a fire tunnel is investigated using the two- and three-dimensional experiments along with numerical models described in previous papers. It is found that the heated air flow can appear to be either a stratified or a mixed flow pattern in accordance with different ventilation velocities, heat release rates, and downstream positions. To deal with tunnel fire circumstances, the mixed convection is evaluated using a nondimensional variable Gr*/ReH 5/2. A quantitative relationship between Gr*/ReH 5/2 and a parameter which quantifies the varying degrees of the stratification at each tunnel cross section was established. By comparing the results from two- and three-dimensional analyses, the effects of secondary flow on the temperature stratification are discussed. The conclusions obtained are directly related to the safety considerations in tunnel fires.|
|Source Title:||JSME International Journal, Series B: Fluids and Thermal Engineering|
|Appears in Collections:||Staff Publications|
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