Imperial College London
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ProfessorJoaquimPeiro

Faculty of Engineering, Department of Aeronautics

Professor of Engineering Computation
 
 
 
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Contact

 

j.peiro Website

 
 
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Location

 

214City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Ang:2022:10.1007/s10694-022-01285-4,
author = {Ang, CD and Peiro, J and Riess, I and Rein, G},
doi = {10.1007/s10694-022-01285-4},
journal = {Fire Technology},
pages = {2925--2947},
title = {Analysis of fire throttling in longitudinally ventilated tunnels with a one-dimensional model},
url = {http://dx.doi.org/10.1007/s10694-022-01285-4},
volume = {58},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Fire throttling is the increase in flow resistance due to a large fire in a longitudinally ventilated tunnel. Although the fire throttling effect has been been known and studied for tunnels over the last 40 years, there is not yet a consistent one-dimensional (1D) model that can describe this behaviour or a framework suitable for practical application. We propose a semi-empirical model, based upon pipe flow engineering principles, to describe this effect by separating the resistance to flow, or pressure loses in three parts: upstream of the fire, locally at the fire, and downstream of the fire. The proposed 1D model called TE1D is derived from a simple steady one-dimensional momentum balance in which a semi-empirical mean temperature distribution is assumed across the tunnel. We verify the model by comparing the pressures losses it predicts with those calculated in CFD simulations based on OpenFOAM and Fire Dynamics Simulator. The comparison shows good agreement between the CFD codes for the range of fires sizes considered from 5 to 50 MW and good agreement between TE1D and the CFD results with the proposed 1D model for fire sizes below 30 MW. However, for values above there are large discrepancies between the results obtained by the TE1D and CFD. We posit as a potential explanation that these differences are due to flow and temperature stratification which is not accounted for in the 1D model. The model using pipe flow principles allows engineers to adopt this model for design, together with other pressure losses considered in tunnel ventilation.
AU  - Ang,CD
AU  - Peiro,J
AU  - Riess,I
AU  - Rein,G
DO  - 10.1007/s10694-022-01285-4
EP  - 2947
PY  - 2022///
SN  - 0015-2684
SP  - 2925
TI  - Analysis of fire throttling in longitudinally ventilated tunnels with a one-dimensional model
T2  - Fire Technology
UR  - http://dx.doi.org/10.1007/s10694-022-01285-4
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000832804500001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://link.springer.com/article/10.1007/s10694-022-01285-4
UR  - http://hdl.handle.net/10044/1/99372
VL  - 58
ER  -
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