Numerical Modelling of Unchannelled Balcony Spill Plumes using using FDS 5 (2012)
Type of ContentTheses / Dissertations
Thesis DisciplineFire Engineering
Degree NameMaster of Engineering in Fire Engineering
PublisherUniversity of Canterbury. Civil Engineering
Currently there is limited design guidance for calculation that involves an unchannelled balcony spill plume. The current guidance for unchannelled spill plume can be obtained from CIBSE (TM19) and BS PD 7974 (Part 2). The guidance is a result of an analysis performed by Law (1995) on a set of experiments performed by Hansell et al (1993). Recently a series of unchannelled balcony spill plume experiments have been performed by Harrison (2009) at 1/10th-scale as part of a research project. Harrison (2009) developed a simplified design formula to calculate the mass flow rate from unchannelled spill plume. Results from Harrison suggested that an unchannelled balcony spill plume is a complex problem and his experiments were limited by the experimental facility. Harrison (2009) recommended that this problem should be supported with computer modelling for design. Research from Harrison (2009) also resulted in a correlation that can be used to calculate the effective width of an unchannelled balcony spill plume. This research is primarily a numerical simulation of the unchannelled balcony spill plume using Fire Dynamics Simulator 5 version 5.3.0 (FDS 5). FDS 5 was used to model unchannelled balcony spill plume experiments performed by Harrison (2009) at 1/10th-scale. Results from Harrison‟s (2009) experiment were used to verify the results from the FDS simulation. A good match was obtained between experimental results and FDS simulation results. The 1/10th-scale model was extended to full-scale using the scaling laws. Then, the model was used to perform a series of unchannelled balcony spill plume simulations with variables of balcony breadth, compartment opening, fire size and height of rise of the spill plume. Mass flow rate readings from simulations were used to improve the effective width correlations developed by Harrison and an improved effective width correlation was developed. Unchannelled balcony spill plume mass flow rate prediction with the revised effective width correlation was compared with mass flow rate predictions using the effective width correlation from Law (1995) and Harrison (2009).
Keywordsbalcony spill plume
RightsCopyright Ho Yong Tiong
Showing items related by title, author, creator and subject.
Numerical simulation of scale-model smoke contamination of upper atrium levels by a channelled balcony spill plume Ho, C.L.; Li, K.Y.; Spearpoint, M.J. (University of Canterbury. Civil and Natural Resources Engineering, 2013)Smoke contamination of balconies due to a channelled spill plume at a lower level in an atrium might occur during a fire and could affect occupant safety during an evacuation. Previous experimental work has investigated ...
Physical Scale Modelling of Smoke Contamination in Upper Balconies by a Balcony Spill Plume in an Atrium Tan, Fabian (University of Canterbury, 2009)Whether the balcony spill plume will rise as a free plume or curl inwards towards the atrium structure is determinant upon a number of factors. Admittedly, not all the factors are well investigated and wholly understood, ...
Physical scale modeling of smoke contamination in upper balconies by a channeled balcony spill plume in an atrium Tan, F.; Harrison, R.; Spearpoint, M.J. (University of Canterbury. Civil and Natural Resources Engineering, 2010)Whether the balcony spill plume will rise unhindered as a free plume or curl inward and interact with the atrium structure is dependent upon a number of factors. Not all the factors are well investigated and wholly understood, ...