Numerical Simulation of smoke dispersion through a long vertical duct
A long vertical duct is an essential installation for extracting smoke to the ground level when a fire occurs in underground space.Due to the limitations of its basic assumptions,the existing two-layer zone model is unstable to model smoke dispersion through a long vertical duct.Therefore,an assessment was made to investigate the applicability of the field model,which is based on the computational fluid dynamics (CFD).A configuration similar to the published experimental work was modeled to test the validity.It is clear that under a consistent decision criterion based on the mass fraction,the field model (CFD) is able to predict that the diffusion front progresses up the shaft with the rate exactly same as that in the empirical correlation equation.This result is far better than the mathematically obtained equations.Therefore it can be said that the field model is an available option to predict smoke dispersion through the long vertical shaft.
long vertical duct fire smoke CFD underground space modeling
Ryonghyon HWANG Jianghyon MUN Kyongsu KIM
College of Mining Engineering,Kimchaek University of Technology,Pyongyang 999093
国内会议
沈阳
英文
465-469
2012-11-11（万方平台首次上网日期，不代表论文的发表时间）