利用激波管测量丁醇着火延时的试验

Experimental Study on Ignition Delay of Butanol Using Shock Tube

在双膜化学激波管实验装置上,运用反射激波测量了丁醇-氮气-氧气混合气在温度1 043.32~1 163.72 K、压力671~835 kPa、当量比分别为1.0、1.5、0.5下的着火延迟.试验结果表明：随着温度的增加,丁醇的着火延时缩短,并且着火延时的对数与温度的倒数呈正比,满足Arrhenius关系式;随着当量比的升高,着火延时减小.根据试验数据,构建了丁醇-氮气-氧气混合气着火延迟的Arrhenius关系,丁醇着火延时对压力的依赖性很高,而活化能对当量比的变化不敏感.

Ignition delay of n-butanol-oxygen-nitrogen mixtures were measured behind reflected shock waves in a double diaphragm chemical shock tube at temperature ranges of 1 043.32~1 163.72 K,pressure at 0.671~0.835 MPa,and equivalence ratio at 1.0,1.5,and 0.5 respectively.The experimental results show that the ignition delay of the mixtures decreases with the increase in temperature and equivalence ratio.The logarithmic value of the ignition delay is proportional to the reciprocal of temperature and agrees well with Arrhenius-type correlation equation.An Arrhenius-type correlation equation for the ignition delay time of butanol-oxygen-nitrogen mixtures was developed.The results illustrate that the ignition delay of butanol shows strong dependence on the pressure,but active energy is less sensitive to the equivalence ratio.