Numerical research of heat and mass transfer at the ignition of system “fabric – combustible liquid – oxidant” by the local energy source

Dmitrii O Glushkov,Genii V Kuznetsov,Pavel A Strizhak,G V Kuznetsov,P A Strizhak,A O Zhdanova,E E Bulba

doi:10.1051/epjconf/20158201038

Abstract

A numerical research was executed for macroscopic regularities determination of heat and mass transfer processes under the conditions of phase transformation and chemical reaction at the ignition of vapour coming from fabrics impregnated by typical combustible liquid into oxidant area at the local power supply. Limit conditions of heterogeneous system “fabric – combustible liquid – oxidant” ignition at the heating of single metal particle was established. Dependences of ignition delay time on temperature and rates of local power source were obtained.

Highlights

Numerical investigations of heat and mass transfer processes at the ignition of solid [1,2,3,4], liquid [5,6,7,8] condensed substances and polymer materials [9, 10] by local energy source with limited power consumption was held in recent years.In power engineering and mechanical engineering at various technological processes products from fabric rather often can be applied to cleaning of surfaces, putting greasing, removal of surplus of greasing, etc
A numerical research was executed for macroscopic regularities determination of heat and mass transfer processes under the conditions of phase transformation and chemical reaction at the ignition of vapour coming from fabrics impregnated by typical combustible liquid into oxidant area at the local power supply
∗∗∗ d is dimensionless ignition delay time of fabric impregnated by diesel fuel

Summary

Introduction

Numerical investigations of heat and mass transfer processes at the ignition of solid [1,2,3,4], liquid [5,6,7,8] condensed substances and polymer materials [9, 10] by local energy source with limited power consumption (metallic and non-metallic particles, wires, cores, concentrate radiation flows and etc.) was held in recent years. In power engineering and mechanical engineering at various technological processes products from fabric rather often can be applied to cleaning of surfaces, putting greasing, removal of surplus of greasing, etc. As a rule, such fabrics after corresponding technological processes have high fire danger. The purpose of present work is numerical research of heat and mass transfer processes in system “fabric – combustible liquid – oxidant” and investigation of extreme ignition conditions for combustible vapors coming from fabric surfaces impregnated by liquid condensed substance under the local heating

Problem statement

Mathematical model

Results and discussion

Conclusions