摘要
利用多功能燃烧弹进行了混合气温度对甲醇均质压燃性能影响的研究,混合气温度作为燃烧的重要边界条件之一,直接影响到燃烧始点、燃烧压力、压力升高率、放热量、放热率以及燃烧持续期等.在90℃至130℃范围内,随着混合气温度升高,着火时刻提前,其变化梯度约为1.2 ms/℃.在90℃、110℃和130℃3个试验温度下,最高爆发压力出现的时间相差25 ms和28 ms;同时温度的提高也引起了压力升高率增大,最大压力升高率依次为0.53 MPa/ms、0.64 MPa/ms和0.77 MPa/ms.而且随温度的增加放热量曲线变陡,达到最大放热量所用的时间分别为11 ms、7.4 ms和5.3 ms;最高放热率随温度提高而增大,分别增大为140%和49%;燃烧持续期随混合气温度升高而缩短,这一规律随着混合气浓度的增加而更加明显.
By means of muhifunction combustion bomb, the influence of gas mixture temperature on the performance of methanol HCCI was studied. As one of the important boundary conditions of combustion, gas mixture temperature directly influences start point and pressure of combustion, ratio of pressure raise, releasing heat quantity and ratio, combustion duration, and so on. Within the range of 90-130℃, the start point of combustion advances with the increase of gas mixture temperature, and the gradient is around 1.2 ms/℃. At the test temperatures of 90℃, 110℃ and 130℃, the differences between the highest blast pressures are 25 ms and 28 ms, and at the same time, the rise of temperature results in the increase of pressure, with the ratios being 0.53 MPa/ms, 0.64 MPa/ms and 0.77 MPa/ms. Thermal release curve changes sharply with temperature, and the time of reaching the peak point is 11 ms, 7.4 ms and 5.3 ms respectively. The highest thermal release ratio increases with temperature by 140% and 49% respectively. Combustion duration gets shorter with the rise of gas mixture temperature, and the trend appears more obvious with the increase of the density of mixture gas.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2009年第2期109-113,共5页
Journal of Combustion Science and Technology
基金
国家高技术研究发展计划(863)资助项目(2006AA11A1D6)
关键词
甲醇
燃烧弹
均质压燃
混合气温度
methanol
combustion bomb
homogeneous charge compression ignition
mixture temperature
