Journal
APPLIED THERMAL ENGINEERING
Volume 111, Issue -, Pages 30-38Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2016.08.161
Keywords
Maximum smoke temperature; Enclosed channel; Fire location; Smoke movement; Flame inclination
Funding
- National Natural Science Foundation of China [51323010]
- Fundamental Research Funds for the Central Universities [WK2320000033]
Ask authors/readers for more resources
Smoke movement and the temperature beneath the ceiling in enclosed channel were investigated experimentally and theoretically. The experimental results show that the maximum smoke temperature decreases with an increasing flame inclination angle when fire source is moving away from the channel center in Region I (within the dimensionless distance for 0.64), which is caused by the gas velocity difference of the two sides of flame. However, when the dimensionless distance is >0.64, the maximum smoke temperature was observed to rise. In addition, an existing model was improved to predict the maximum smoke temperature in enclosed channel applying it to different boundary conditions. Its predictions fit reasonably well when the fire source located at Region I. Beyond that, the predictions are lower than the experiments, which is probably because of the absent consideration of bouncing process of the hot smoke from end walls. Therefore, an extra correction coefficient was proposed to the improved model in Region II with a consideration of bouncing process of the hot smoke from both end walls. As a result, it was found that the experimental results can be well predicted by this model in Region H. (C) 2016 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available