基于GT-Power的天然气发动机爆震分析与研究

发布时间：2018-01-01 15:39

本文关键词：基于GT-Power的天然气发动机爆震分析与研究　出处：《车用发动机》2016年05期 　论文类型：期刊论文

【摘要】：为了改善增压天然气发动机的燃烧状况、提高发动机的性能,对某发电用增压天然气发动机爆震现象进行研究。利用GT-Power软件建立了增压天然气发动机整机仿真模型,通过模拟数据与试验数据的对比验证了模型的准确性,然后在仿真模型中利用自主建立的爆震预测模型对天然气发动机的性能和爆震现象进行了模拟计算,并对得到的数值结果进行分析。结果表明:随着压缩比的增加,发动机发生爆震的可能性增大,爆震开始时刻提前,爆震强度增大,燃气消耗率呈现先减小后增大的趋势,压缩比为13时,燃气消耗率最小;随着点火提前角的增加,发动机发生爆震的可能性增大,爆震开始时刻提前,爆震强度基本不变,燃气消耗率变化趋势是先减小后增大,当点火提前角为-21°时,燃气消耗率最小。
[Abstract]:In order to improve the combustion of turbocharged natural gas engine and improve the performance of the engine. The detonation phenomenon of a supercharged natural gas engine for power generation is studied. The simulation model of turbocharged natural gas engine is established by using GT-Power software. The accuracy of the model is verified by comparing the simulation data with the experimental data. Then the performance and detonation phenomena of natural gas engine are simulated and calculated by using the independently established detonation prediction model in the simulation model. The results show that the possibility of detonation increases with the increase of compression ratio, and the detonation intensity increases as the detonation begins earlier. The gas consumption rate decreases first and then increases. The compression ratio is 13:00 and the gas consumption rate is the smallest. With the increase of ignition advance angle, the possibility of engine detonation increases, the detonation start time is early, the detonation intensity is basically unchanged, and the change trend of gas consumption rate is to decrease first and then increase. When the ignition advance angle is -21 掳, the gas consumption rate is minimum.
【作者单位】：山东理工大学交通与车辆工程学院;
【分类号】：TK431
【正文快照】： 天然气具有储存量大、有害物质排放少、抗爆性能好等特点,是一种较为理想的替代燃料。由于天然气的着火温度较高,火焰传播速度慢,容易造成天然气发动机后燃严重、排气温度高、热负荷大,从而导致天然气发动机能耗增加、热效率降低,使得天然气发动机的动力性能与汽油机和柴油机

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