Numerical simulation of an experimental atrium fires in combined natural and forced ventilation by CFD

IF 1.1 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

International Journal of Ventilation Pub Date : 2020-01-02 DOI:10.1080/14733315.2018.1524196

Mohsen M. Barsim, M. Bassily, H. El-Batsh, Yaser A. Rihan, M. M. Sherif

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引用次数: 13

Abstract

Abstract This study investigates the measurements data attained in Murcia Atrium fire tests (Gutiérrez-Montes, Sanmiguel-Rojas, Viedma, & Rein) using general CFD code, CFX-16.2 ( CFX-16.2, ANSYS, Inc.). Experiments were executed by burning heptane as a fuel for three different fires capacities, (1.32, 2.28 and 2.34 MW). Historically, CFX was validated with experimental data for compartment fires including natural ventilation only. In this paper validation was performed for developing fires during transient period in a large space, including the effect of combined natural and forced ventilation. Two different combustion models i.e. Non-combustion model and Eddy Dissipation Model (EDM) were used to represent the combustion of heptane. Four different approaches were employed to determine the predicted dynamic behavior of the smoke height and to evaluate the accuracy of CFX predictions. The results display CFX predictions have a reasonable concord with the experimental data. Therefore, CFX can be a valid tool for performance-based engineering to evaluate the smoke systems required for complex enclosed structures.

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自然与强制联合通风下实验中庭火灾的CFD数值模拟

摘要本研究利用通用CFD代码CFX-16.2 (CFX-16.2, ANSYS, Inc.)对Murcia中心房火灾试验(gutisamuel - montes, sanmigel - rojas, Viedma， & Rein)获得的测量数据进行了研究。实验以庚烷为燃料，以三种不同的燃烧能力(1.32,2.28和2.34 MW)进行。从历史上看，CFX仅通过包括自然通风在内的隔间火灾的实验数据进行验证。本文对大空间瞬态发展火灾进行了验证，包括自然通风和强制通风联合的影响。采用非燃烧模型和涡流耗散模型(EDM)两种不同的燃烧模型来表征庚烷的燃烧。采用了四种不同的方法来确定烟高的预测动态行为，并评估CFX预测的准确性。结果表明，CFX预测与实验数据有较好的一致性。因此，CFX可以成为基于性能的工程评估复杂封闭结构所需的烟雾系统的有效工具。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Ventilation CONSTRUCTION & BUILDING TECHNOLOGY-ENERGY & FUELS

CiteScore

3.50

自引率

6.70%

发文量

审稿时长

>12 weeks

期刊介绍： This is a peer reviewed journal aimed at providing the latest information on research and application. Topics include: • New ideas concerned with the development or application of ventilation; • Validated case studies demonstrating the performance of ventilation strategies; • Information on needs and solutions for specific building types including: offices, dwellings, schools, hospitals, parking garages, urban buildings and recreational buildings etc; • Developments in numerical methods; • Measurement techniques; • Related issues in which the impact of ventilation plays an important role (e.g. the interaction of ventilation with air quality, health and comfort); • Energy issues related to ventilation (e.g. low energy systems, ventilation heating and cooling loss); • Driving forces (weather data, fan performance etc).