دانلود رایگان مقاله لاتین شعله آتش در نمای پنجره از سایت الزویر
عنوان فارسی مقاله:
بررسی عددی شعله های آتش در نمای پنجره بیرونی
عنوان انگلیسی مقاله:
Numerical investigation on window ejected facade flames
سال انتشار : 2016
برای دانلود رایگان مقاله شعله آتش در نمای پنجره اینجا کلیک نمایید.
مقدمه انگلیسی مقاله:
1. Introduction
The façade is the interface between the inside and outside of a building. In this area, a lot of factors that facilitate dynamics of fire converge (unlimited amount of oxygen, verticality of the surface, wind,…). When the wall cladding is combustible these factors can be damaging but the vertical spread of fire can occur even when the façade is not combustible. Recently, there has been growing interest in Fire Safety of Façade. Many researchers have extensively studied this topic experimentally [1–3] and numerically [6–7]. Factors affecting a fire are primarily the fire source (type, load and distribution) and ventilation, such as size of openings and rate of burning. Generally, external flames appear when air supply inside the compartment is no longer sufficient. This is controlled by the openings dimensions and these flames can be considered in terms of flame shape (Height, width and depth) [1–3]. This paper presents a numerical investigation on ejected flame behavior from enclosure fires in different opening configurations (opening dimensions, opening positions and distance between sidewalls at the opening) and for different heat release rates. The influence of these parameters on fire spread along a façade was widely studied using small-scale tests. For example, Lu [1–2] carried out a series of experiments on reduce-scale models and proposed to correlate opening dimensions and sidewalls distance (D) by a global dimensionless parameter in order to explain the sidewall effects. Tang [3] used a similar configuration in order to study the influence of dimensions of an opening on the external flame properties. However, all these experiments were performed using a low heat release rate (lower than 250 kW) and with compartments not exceeding 80 cm square in shape. The aim of the present study is: 1. To assess the ability of the used code (FDS) to model a compartment fire with external flames. 2. To numerically assess the influence of the opening dimensions and its position on the excess heat release rate due to the burning excess fuel outside the compartment. 3. To numerically assess the influence of a “U” channel configuration on flame height along the facade above the opening. 4. To verify if the correlations obtained by [1–3] for small scale tests (50 kW) are available for large scale compartment fires simulated with HRR¼5.5 MW and 6.5 MW. Finally, this study will identify and quantify the influence of geometrical parameters on external flames.
برای دانلود رایگان مقاله شعله آتش در نمای پنجره اینجا کلیک نمایید.
کلمات کلیدی:
Window ejected flame height and heat flux along facade with air ... www.sciencedirect.com/science/article/pii/S037971121400174X by F Tang - 2015 - Cited by 2 - Related articles External building facade fires from window of under-ventilated enclosure fire poses a serious fire hazard to upper floors. This paper investigates specially the. Merging behavior of facade flames ejected from two windows of an ... www.sciencedirect.com/science/article/pii/S1540748914000868 by K Lu - 2015 - Cited by 10 - Related articles Jun 21, 2014 - Flames ejected from the windows from under ventilated room fires in high rise buildings can spread to upper floors along the facade wall, ... Experimental investigation on window ejected facade flame heights ... https://www.researchgate.net/.../263894126_Experimental_investigation_on_window_ej... This paper presents an experimental investigation on the effect of side wall length (normal to the facade direction) on the ejected facade flame height from a ... Window ejected flame height and heat flux along facade with air ... https://www.researchgate.net/.../276314288_Window_ejected_flame_height_and_heat_f... Oct 18, 2016 - External building facade fires from window of under-ventilated enclosure fire poses a serious fire hazard to upper floors. This paper investigates ... Numerical investigation on window ejected facade flames iranarze.ir/wp-content/uploads/2017/02/E3663.pdf Numerical investigation on window ejected facade flames. M. Duny a,b,n, D. Dhima a, J.P. Garo b, H.Y. Wang b a CSTB Centre Scientifique et Technique du ... Experimental study of window-ejected flame and plume on glass ... www.matec-conferences.org/articles/matecconf/pdf/2016/09/matecconf_05009.pdf by L Peng - 2016 - Related articles threats from window-ejected flame and plume to the glass curtain walls of upper ..... facade but no attachment occurred in Test #2 (W:B = 1); the flame ejected ... 9. Merging behavior of facade flames ejected from two windows ... - 首页 en.ahau.findplus.cn/?h=articles&db=edselp&an... Translate this page Merging behavior of facade flames ejected from two windows of an ... A reduced-scale model (about 1:4) of a compartment fire with a facade wall has been ... Numerical investigation on window ejected facade flames - INFONA https://www.infona.pl/.../bwmeta1.element.elsevier-8b5201fa-0dbf-3e99-bed6-bbf0e... by M Duny - 2016 - Related articles A numerical simulation was performed to assess the ability of the used code to model a compartment fire with external flames. Thereafter, numerical ...
