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Both traditional ceiling plume theory and Thomas' correlation are inadequate in analysing tunnel fire ventilation.
The comparison has indicated that the new theory has provided a more general curve that represents the critical Froude number Fr in longitudinal tunnel fire ventilation.
The good agreement between the current prediction and three different sets of experimental data has demonstrated that the theory has correctly modelled the relation among the heat release rate of fire, ventilation flow and the height of tunnel.
The current analysis has revealed that in order to predict the behaviour of critical velocity correctly, all three controlling factors, namely fire, ventilation and tunnel height must be taken into account.
Similar(56)
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A numerical parametric study has been performed to evaluate how the characteristics (fire load, ventilation condition and construction materials) of natural fires in buildings affect this additional specific heat of gypsum plasterboard.
The geometric mean 48-h48-h.53of 53 households in kitchens using wood in an open fire without ventilation in rural Mexico was 615 μg/m, and the AM of 48-h PM2.5 measurements of 63 households in the highlands of San Marcos, Guatemala using open wood fires was 900 ± 700 μg/m.
The problem, it seems, was a fire in the ventilation system.
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