论文部分内容阅读
对纯大豆生物柴油和普通柴油在定容燃烧室中进行了对比试验.首先利用OH化学发光成像法研究了环境温度对直喷油束燃烧火焰升举长度的影响,然后计算分析了升举长度变化对升举长度处氧卷吸特性(即含氧率)的影响,环境温度变化区间为800～1200K.在整个试验过程中,定容室内密度、含氧量、喷射压力和喷射脉宽都维持不变.试验结果表明:随着环境温度的升高,两种油的火焰升举长度都减小,特别当环境温度由800K变化到900K时的减幅最大;生物柴油火焰升举长度在所有环境温度下都比普通柴油大,火焰升举长度处含氧率的变化趋势与升举长度的变化趋势相似,但含氧率差别更加明显.
The contrast experiments of pure soybean biodiesel and ordinary diesel in constant volume combustion chamber were carried out.Firstly, using OH chemiluminescence imaging method to study the effect of ambient temperature on the flame lift length of direct injection oil combusting combustion, the lift length Variations on the oxygen entrainment characteristics (ie oxygen content) of the ascending length, the range of ambient temperature change is 800 ~ 1200 K. Throughout the test, constant volume density, oxygen content, injection pressure and pulse width The results showed that the flame lift length of both oils decreased with the increase of ambient temperature, especially when the ambient temperature was changed from 800K to 900K. The flame lift of biodiesel ranged from The change trend of oxygen content in flame lifting length is similar to that of lifting length at all ambient temperatures, but the difference of oxygen content is more obvious.