CAJ | 학술논문

粉尘爆炸是工业爆炸灾害的重要形式。建立可燃颗粒非均相系统的燃烧爆轰模型，基于Eulerian-Eulerian数值描述方法，采取有限差分方法编制非均相系统燃烧和爆轰发展的数值模拟程序，对封闭空间内两相非定常爆轰过程进行研究。数值分析可燃颗粒尺度、颗粒浓度对非均相系统燃烧、爆轰特性的影响。结果表明：在一定的范围内，当可燃颗粒的体积分数为10%，粒径0.5mm时，流场的燃烧爆轰效应最强。即10.6ms时刻，流场压力值达到28MPa，温度高达2600K，颗粒燃烧效率最高。
분진폭작시공업폭작재해적중요형식。건립가연과립비균상계통적연소폭굉모형，기우Eulerian-Eulerian수치묘술방법，채취유한차분방법편제비균상계통연소화폭굉발전적수치모의정서，대봉폐공간내량상비정상폭굉과정진행연구。수치분석가연과립척도、과립농도대비균상계통연소、폭굉특성적영향。결과표명：재일정적범위내，당가연과립적체적분수위10%，립경0.5mm시，류장적연소폭굉효응최강。즉10.6ms시각，류장압력치체도28MPa，온도고체2600K，과립연소효솔최고。
Dust explosion is an important form of industrial explosion disasters. A combustion and detonation model of heterogeneous system for combustible particle was established,and Eulerian-Eulerian numerical method was a-dopted. Fortran program was developed by the finite difference method,and the development processes of combus-tion and detonation in the closed field were simulated numerically for heterogeneous system. Effects of fuel particle concentration,scale of particle on detonation properties were analyzed. The results showed that for the volume frac-tion 10% of combustible particle and 0. 5mm of particle diameter,the combustion detonation properties of flow field are optimum within the discussion scope of this paper. At 10. 6ms,the pressure can reach 28MPa,and the temper-ature can reach 2600K,so the combustion efficiency of particle is the highest.