Scale Model Studies on Heater-Induced Hot Air Layer in a Tilted Duct

doi:10.3850/978-981-08-7724-8_03-05

Scale Model Studies on Heater-Induced Hot Air Layer in a Tilted Duct

J.F. Zou¹, Y. Gao¹, H. Dong¹ and W.K. Chow^2,a

¹Department of Building Engineering, Harbin Engineering University, Harbin, Heilongjiang, China

²Research Centre for Fire Engineering, Department of Building Services Engineering, Area of Strength: Fire Safety Engineering, The Hong Kong Polytechnic University, Hong Kong, China.

^abewkchow@polyu.edu.hk ^bbeelize@polyu.edu.hk

ABSTRACT

Hot air layer induced by a fire was studied experimentally in a scale tilted duct. The duct was 3.0 m long, 0.8 m wide and 1.0 m high. The inclination angle varied from 0° to 30° to the horizontal. A 1.5 kW electric heater was set up inside the duct. Air temperature distributions were measured. Further, two computational fluid dynamics packages were applied to simulate the heater-induced air flow with results compared with the measurements. Data obtained in this study will be useful for better understanding of hot smoke in tilted tunnel fires.

Keywords: Tunnel, Experiment, Temperature, Inclination angle.

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Scale Model Studies on Heater-Induced Hot Air Layer in a Tilted Duct

J.F. Zou1, Y. Gao1, H. Dong1 and W.K. Chow2,a

1Department of Building Engineering, Harbin Engineering University, Harbin, Heilongjiang, China

2Research Centre for Fire Engineering, Department of Building Services Engineering, Area of Strength: Fire Safety Engineering, The Hong Kong Polytechnic University, Hong Kong, China.

ABSTRACT

J.F. Zou¹, Y. Gao¹, H. Dong¹ and W.K. Chow^2,a

¹Department of Building Engineering, Harbin Engineering University, Harbin, Heilongjiang, China

²Research Centre for Fire Engineering, Department of Building Services Engineering, Area of Strength: Fire Safety Engineering, The Hong Kong Polytechnic University, Hong Kong, China.