دانلود رایگان مقاله لاتین شبیه ساز پویایی آتش سوزی از سایت الزویر
عنوان فارسی مقاله:
بررسی تاثیر سوخت شکل هندسی در پیش بینی شبیه ساز پویایی آتش سوزی (FDS) برای یک آزمایش آتش سوزی کالاهای سنگین تونل خودرو در مقیاس بزرگ
عنوان انگلیسی مقاله:
Assessing the influence of fuel geometrical shape on fire dynamics simulator (FDS) predictions for a large-scale heavy goods vehicle tunnel fire experiment
222222
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مقدمه انگلیسی مقاله:
1. Introduction
Fires in tunnels are often caused by vehicle accidents that occur inside them. The characteristics of the fire depend on the various types of vehicles involved and for road tunnels these could include passenger cars, utility vehicles, buses and/or heavy goods vehicles (HGVs). HGVs usually have much larger dimensions and carry goods that can cause more severe fires than normal passenger cars. Therefore HGV fires can pose a greater risk to life safety and property protection than fires caused by other types of vehicles. Fire Dynamics Simulator version 6.2.0 (FDS6) [1] is a commonly used tool in fire engineering to simulate fires. In FDS, a typical way to simulate a given heat release rate (HRR) fire is to representit as the ejection of gaseous fuel from a solid surface by a 2D ‘gas burner’. In previous work Li et al. [2] used a simple 2D gas burner with a dimension of 3 m 10 m to represent the HGV to simulate the Runehamar tunnel fire experiment using FDS. This 2D gas burner representation of a fire is also specified in the New Zealand Verification Method: Framework for Fire Safety Design [3]. The results in the study of Li et al. showed that the simplified 2D gas burner of HGV could give reliable predictions of ceiling temperatures along the tunnel length however, Li et al. did not predict temperature profiles at different tunnel cross section locations. In the work of Cheong et al. [4] a more complex fuel representation was used to simulate the Runehamar HGV fire experiment where the fuel package surface area in the simulation was equivalent to the fuel surface area in the experiment and the inputted HRR curves were based on conecalorimeter experimental results. The approach used in their work was mainly for the prediction of HRR of tunnel fires using FDS and the influence on temperature distributions due to the geometrical shape of the HGV was not investigated in their work. For an HGV fire that occurs under a forced ventilation condition, the burning behaviour will be affected by the airflow [5,6]. The physical dimensions of the HGV will also interact with the airflow so that the behaviour of the fire and the downstream temperature distribution in the tunnel will likely be further affected. Any changes in the shape of the fuel package due to material burning away or the collapse of the fuel package will resultin additional effects on the fire and hence the temperature distributions. Therefore, it is important to take into account the large geometrical vehicle shape in the simulations of HGV fires. In this case study, a series of simulations are carried out to model a large-scale HGV tunnel fire experiment by using different simple geometrical shapes to represent the HGV in order to investigate the influence of the shape of fuel package on flame extensions, the distributions of temperature and gas concentrations. Several simplifications have been made in order to carry out the simulations in a practical manner.
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کلمات کلیدی:
Assessing the influence of fuel geometrical shape on fire dynamics ... www.sciencedirect.com/science/article/pii/S2214398X16300012 by X Wang - 2016 - Cited by 1 - Related articles Assessing the influence of fuel geometrical shape on fire dynamics simulator (FDS) predictions for a large-scale heavy goods vehicle tunnel fire experiment. Assessing the influence of fuel geometrical shape on Fire Dynamics ... https://www.researchgate.net/.../301762419_Assessing_the_influence_of_fuel_geometri... Sep 16, 2016 - Official Full-Text Publication: Assessing the influence of fuel geometrical shape on Fire Dynamics Simulator (FDS) predictions for a large-scale ... [PDF]generating fire dynamics simulator geometrical input using an ifc ... www.itcon.org/papers/2007_29.content.09250.pdf by JAW Dimyadi - 2007 - Cited by 11 - Related articles SUMMARY: Fire Dynamics Simulator (FDS) is an advanced simulation tool .... in the creation of open freeform surfaces and objects with complex shapes and. [PDF]Assessing the influence of fuel geometrical shape on fire dynamics ... iranarze.ir/wp-content/uploads/2016/11/E2764.pdf Apr 29, 2016 - of the geometrical shapes causes significant differences in flame ... Fire Dynamics Simulator version 6.2.0 (FDS6) [1] is a commonly used tool in ... FIRE DYNAMICS SIMULATOR VERSION 6: COMPLEX GEOMETRY ... ws680.nist.gov/publication/get_pdf.cfm?pub_id=905812 by RJ McDermott - Cited by 2 - Related articles The Fire Dynamics Simulator (FDS) and Smokeview (SMV) are compu- tational and .... First, we discuss a method to handle complex shapes that are resolved.
