Browse > Article
http://dx.doi.org/10.7731/KIFSE.2019.33.4.035

Fundamental Experiment on the Flow Characteristics inside the Exhaust Duct of Cone Calorimeter  

Shin, Yeon Je (Dept. of Fire Architecture & Fire Safety, Dong Yang Univ.)
You, Woo Jun (Dept. of Fire Architecture & Fire Safety, Dong Yang Univ.)
Publication Information
Fire Science and Engineering / v.33, no.4, 2019 , pp. 35-40 More about this Journal
Abstract
In this study, the mass flow rate of the heat release rate equation, which is the major factor of the oxygen consumption method, was analyzed for the fundamental investigation of the cone-calorimeter (5 m length and 0.3 m diameter). The shapes of a completely empty inside, 3 mm pore diameter mesh and pore diameter 10 mm honeycomb with 0.76 porosity were constructed using the cone-calorimeter. To calculate the mass flow rate, four bi-directional probes and thermocouples were installed in a uniform position in the vertical direction of flow. The velocity gradient and flow perturbation were measured from the increase in Reynolds number. As the flow capacity increased, the speed gradient increased in all three shapes relative to the turbulence intensity. In addition, the deviation of extended uncertainty to the mass flow was completely low in the order of empty space, mesh (dp = 3 mm) and honeycomb (dp = 10 mm and 𝜖 = 0.76) at the 95% confidence level. The results can be used in designs to improve the flow stability of the cone calorimeter.
Keywords
Duct shape factor; Cone calorimeter; Mass loss late; Heat release rate; Uncertainty;
Citations & Related Records
연도 인용수 순위
  • Reference
1 V. Barauskas and R. D. Peacock, "Heat Release Rate: the Single Most Important Variable in Fire Hazard", Fire Safety J., Vol. 18, pp. 255-272 (1992).   DOI
2 W. J. You, D. G. Nam, M. C. Youm, S. C. Kim and H. S. Ryou, "Analysis of Heat Release Rate with Various Diameter of Heptane Pool Fire Using Large Scale Cone Calorimeter", Fire Science and Engineering, Vol. 28, No. 5, pp. 1-7 (2014).   DOI
3 S. C. Kim and M. Bundy, "Numerical Model of a Large Scale Oxygen Consumption Fire Calorimeter", J. Thermal Analysis and Calorimetry, Vol. 93, No. 3, pp. 1013-1019 (2008).   DOI
4 R. A. Bryant, T. J. Ohlemiller, E. R. Johnsson, A. Hamins, B. S. Grove, G. W. Guthrie, A. Maranghides and G. W. Mulholland, "The NIST 3 Megawatt Quantitative Heat Release Rate Facility", NIST Special Publication 1007 (2003).
5 A. Hamins, J. C. Yang and T. Kashiwagi, "A Global Model for Predicting the Burning Rates of Liquid Pool Fires", NISTIR 6381 (2000).
6 D. W. Stroup, L. A. Delauter, J. Lee and G. Roadarmel, "Large Fire Reseach Facility (Building 205) Exhaust Hood Heat Release Rate Measurement System", NISTIR 6509 (1999).
7 W. K. Chow and S. S. Han, "Heat Release Rate Calculation in Oxygen Consumption Calorimetry", Applied Thermal Engineering, Vol. 31, pp. 304-310 (2010).   DOI
8 E. J. Lee, "Design of Large Cone Calorimeter for the Fire Study", Transaction of Korean Institute of Fire Science & Engineering, Vol. 20, No. 4, pp. 65-71 (2006).
9 S. C. Kim, "Application of Numerical Model for the Effective Design of Large Scale Fire Calorimeter", Journal of Korean Institute of Fire Science & Engineering, Vol. 24, No. 6, pp. 28-33 (2010).
10 J. Axelsson, P. Anderson, A. Lonnermark, P. V. Hees and I. Wetterlund, "Uncertainties in Measuring Heat and Smoke Release Rate in the Room/Cornet Test and the SBI", SP Report 2001:04, Boras (2001).
11 R. A. Bryant and G. W. Mulholland, "A Guide to Characterizing Heat Release Rate Measurement Uncertainty for Full-scale Fire Tests", Fire and Material, Vol. 32, pp. 121-139 (2008).   DOI
12 P. J. Dinenno, P. E. Craig and L. Beyler, "SFPE Handbook of Fire Protection Engineering", 4th Edition, the National Fire Protection Association (2008).
13 International Organization for Standardization, "Guide to the Expression of Uncertainty in Measurement", 1st ed., Geneva (1993).
14 B. J. McCaffrey and G. Heskestad, "A Robust Bidirectional Low-Velocity Probe for Flame and Fire Application", Combustion and Flame, Vol. 26, No. 1, pp. 125-127, (1976).   DOI