本文選題：進(jìn)氣溫度 + 燃料溫度��； 參考：《科學(xué)技術(shù)與工程》2016年27期

【摘要】：以一臺(tái)增壓二甲醚發(fā)動(dòng)機(jī)為研究對(duì)象,研究進(jìn)氣溫度和燃料溫度對(duì)二甲醚發(fā)動(dòng)機(jī)性能的影響。試驗(yàn)結(jié)果表明,進(jìn)氣溫度升高,燃燒滯燃期縮短,放熱率曲線往前移,預(yù)混合燃燒的峰值降低,預(yù)混合燃燒在整個(gè)燃燒過程中所占比例減小;進(jìn)氣溫度升高會(huì)導(dǎo)致發(fā)動(dòng)機(jī)油耗率上升,排溫升高,NOx排放增加。二甲醚燃料溫度的影響比進(jìn)氣溫度升高,燃料溫度增加會(huì)導(dǎo)致發(fā)動(dòng)機(jī)功率下降。額定工況點(diǎn)下,當(dāng)燃料溫度由28℃升高到40℃時(shí),發(fā)動(dòng)機(jī)的功率由192.1 k W下降到168 k W,下降12.0%。二甲醚溫度每升高1℃,二甲醚發(fā)動(dòng)機(jī)功率平均下降1.0%。
[Abstract]:The effects of inlet temperature and fuel temperature on the performance of a turbocharged DME engine were studied. The experimental results show that with the increase of inlet air temperature, the combustion delay period is shortened, the heat release rate curve moves forward, the peak value of premixed combustion decreases, and the proportion of premixed combustion in the whole combustion process decreases. The increase of intake temperature will lead to the increase of engine fuel consumption rate and the increase of exhaust temperature and the increase of no _ x emission. The influence of DME fuel temperature is higher than that of inlet temperature, and the increase of fuel temperature will lead to the decrease of engine power. When the fuel temperature is increased from 28 鈩，

本文編號(hào)：2054265