基于爆压测试下的燃气发电机组燃烧分析

The Combustion Analysis of Gas Generator Sets based on Peak Combustion Pressure Tests

燃烧过程对内燃机性能的影响是至关重要的。它是内燃机工作循环的中心环节,它与内燃机的基本运行参数,如功率、效率和排放等直接关联。因此,对既可以表征机组工作状态和燃烧过程,又可以作为研究动力学特性依据的缸内燃烧压力的精确测量和有效分析是十分重要的。本文通过对12V190型燃气发电机组的缸内压力、曲轴转角信号进行采样,进而形成不同功率段下的燃烧压力曲线,同时可以获得包括示功图,循环变动率,压力升高率,最大爆发压力等多种参数,还可通过气缸压缩线法确定气缸上止点,确定出机组缸内最大压力发生时刻以及气缸放热所经过的曲轴转角时刻,从而对内燃机缸内燃烧情况进行实际监测及有效分析。

The combustion process is critical to the internal combustion engine performance and plays the core role in the engine operating cycle. The basic operating parameters are directly associ- ated with the engine power, efficiency and emissions. Therefore, the accurate measurement and the efficient analysis of the in - cylinder combustion pressure are very important, which indicate the working state of a generator set and its combustion process. This paper obtains the combustion pressure curves under different powers on the basis of the in - cylinder pressure, the crank angle signals of 12V190 gas engine and gets parameters including in- dicator diagram, circulation change rate, pressure rise rate, peak combustion pressure, but also de- termines the time at the peak combustion pressure and the crank angles. The in -cylinder combus- tion is actual monitored and analyzed.