增压富氧条件下碳颗粒燃烧特性的研究

Study on Combustion Characteristics of Carbon Particle in Pressurized Oxygen-enriched Conditions

对增压富氧条件下碳粒的燃烧速率进行了理论研究。主要考察了增压富氧条件下压力和粒径对碳粒燃烧速率的影响,以及常压下O2/CO2摩尔比对碳粒燃烧速率的影响。计算结果表明:增加气体压力能明显地提高碳粒的燃烧速率,但是当压力升高到一定程度后,继续升高压力对燃烧速率的影响逐渐减小。当粒径由75μm增加到175μm,碳的燃烧速率会随着粒径的增加而增大,但是随着粒径的增大压力对燃烧速率的影响越来越小。在常压下,碳粒的燃烧速率随着O2/CO2摩尔比的增大而增加。

The combustion rate of carbon particle in pressurized oxygen-enriched conditions were theoretically studied.The effect of pressure and particle size on combustion rate of carbon particle were investigated in pressurized oxygen-enriched conditions.At the same time,the influence of the mole ratio of O2/CO2 mixed gas on combustion rate of a carbon particle were investigated in atmospheric conditions.The results show that the combustion rate of carbon particle rise with the increase of the pressures in pressurized oxygen-enriched and pressurized air conditions.But the combustion rate of carbon particle change little at higher pressure.As particle size increase from 75 μm to 175 μm,the combustion rate of carbon particle rise.The combustion rate of carbon particle rise with the mole ratio of O2/CO2 mixed gas in atmospheric conditions.