Flame height and temperature profile of window ejected thermal plume from compartment fire without facade wall

2018 ◽  
Vol 127 ◽  
pp. 53-60 ◽  
Author(s):  
Xiepeng Sun ◽  
Longhua Hu ◽  
Fei Ren ◽  
Kaizhi Hu
Keyword(s):  
Temperature Profile ◽  
Flame Height ◽  
Thermal Plume ◽  
Compartment Fire

scholarly journals Horizontal convection in a rectangular enclosure driven by a linear temperature profile

2021 ◽  
Author(s):  
Tianyong Yang ◽  
Bofu Wang ◽  
Jianzhao Wu ◽  
Zhiming Lu ◽  
Quan Zhou
Keyword(s):  
Rayleigh Number ◽  
Temperature Profile ◽  
Scaling Law ◽  
Thermal Plume ◽  
Steady Regime ◽  
Linear Temperature ◽  
Square Enclosure ◽  
Horizontal Convection ◽  
Kinetic Boundary Layer ◽  
The Mean

AbstractThe horizontal convection in a square enclosure driven by a linear temperature profile along the bottom boundary is investigated numerically by using a finite difference method. The Prandtl number is fixed at 4.38, and the Rayleigh number Ra ranges from 107 to 1011. The convective flow is steady at a relatively low Rayleigh number, and no thermal plume is observed, whereas it transits to be unsteady when the Rayleigh number increases beyond the critical value. The scaling law for the Nusselt number Nu changes from Rossby’s scaling Nu ∼ Ra1/5 in a steady regime to Nu ∼ Ra1/4 in an unsteady regime, which agrees well with the theoretically predicted results. Accordingly, the Reynolds number Re scaling varies from Re ∼ Ra3/11 to Re ∼ Ra2/5. The investigation on the mean flows shows that the thermal and kinetic boundary layer thickness and the mean temperature in the bulk zone decrease with the increasing Ra. The intensity of fluctuating velocity increases with the increasing Ra.

Non-dimensional correlations on flame height and axial temperature profile of a buoyant turbulent line-source jet fire plume

2014 ◽  
Vol 32 (5) ◽  
pp. 406-416 ◽  
Author(s):  
Xiaochun Zhang ◽  
Longhua Hu ◽  
Xiaolei Zhang ◽  
Lizhong Yang ◽  
Shuangfeng Wang
Keyword(s):  
Temperature Profile ◽  
Line Source ◽  
Flame Height ◽  
Fire Plume ◽  
Axial Temperature

scholarly journals An Experimental Study on Buoyant Spilled Thermal Plume Temperature Profile from Over-ventilated Enclosure Fires in a Reduced Air Pressure

2013 ◽  
Vol 62 ◽  
pp. 219-225
Author(s):  
Fei Tang ◽  
Longhua Hu ◽  
Qiang Wang ◽  
Xiaochun Zhang ◽  
Kaihua Lu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Temperature Profile ◽  
Air Pressure ◽  
Thermal Plume ◽  
Plume Temperature

Numerical Simulation of Temperature Profile in a Compartment Fire with a Roof Opening

2012 ◽  
Vol 538-541 ◽  
pp. 989-992 ◽  
Author(s):  
Jin Mei Li ◽  
Qiang Li ◽  
Yan Lei Dong ◽  
Chang Hai Li
Keyword(s):  
Numerical Simulation ◽  
Numerical Simulations ◽  
Temperature Profile ◽  
Source Size ◽  
Temperature Profiles ◽  
Compartment Fire ◽  
Gas Temperature ◽  
Fire Source ◽  
Smoke Layer ◽  
Cooling Function

Fifteen numerical simulations are presented in this article to investigate the influence of roof opening size and fire source size on gas temperature profiles in a compartment. The fire source size has a significant impact on the temperature hot smoke layer. The temperature of hot smoke layer increases as the increase of fire source size. The roof opening has cooling function to gas temperature in the compartment especially for large roof opening. The temperatures of hot smoke layer decrease with the roof opening size increase in all cases.

scholarly journals Experimental study of transitional behavior of fully developed under-ventilated compartment fire and associated facade flame height evolution

2019 ◽  
Vol 208 ◽  
pp. 235-245 ◽  
Author(s):  
Fei Ren ◽  
Longhua Hu ◽  
Xiaolei Zhang ◽  
Xiepeng Sun ◽  
Jianping Zhang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Flame Height ◽  
Compartment Fire ◽  
Transitional Behavior

scholarly journals A STUDY OF COMPARTMENT FIRE UNDER FORCED VENTILATION: EXPERIMENTAL AND COMPUTATIONAL FLUID DYNAMICS MODELING

2010 ◽  
Vol 7 (2) ◽  
pp. 29-41
Author(s):  
M.Z. Abu Bakar ◽  
Y. Wu
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Flame Height ◽  
Compartment Fire ◽  
Forced Ventilation ◽  
Dynamics Modeling ◽  
Road Tunnel ◽  
Computational Fluid Dynamics Modeling ◽  
Computational Fluid Dynamics Cfd ◽  
Flame Shape

This paper discusses on the dynamic behavior of the flame and smoke inside a compartment fire. The compartment can be referred to a room, road tunnel, duct, compartment or a building. A series of small scales experiments were carried on four rectangular ducts that have the same height (250 mm) but different widths (125 mm, 250 mm, 500 mm and 1000 mm). Fire simulations on the same compartments were performed to investigate the effectiveness of Computational Fluid Dynamics (CFD) in predicting fire phenomenon. CFD was found capable to predict fire phenomenon such as flame shape, flame height and flame tilt angle similar to the experiment.

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