Experimental Study of the Influence of Injection Parameters on the Spray and Combustion Process of Dimethyl Ether
Experimental Study of the Influence of Injection Parameters on the Spray and Combustion Process of Dimethyl Ether
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发表时间：
2003
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通讯作者：
Yao Ming
中科院分区：
文献类型：
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作者：
Yao Ming
The influence of injection parameters including the nozzle diameter and injection timing on the spray and combustion process of dimethyl ether(DME)was investigated.By the contrast of photographs of different nozzle diameters,there were almost no differences in ignition delay and combustion duration.With increasing in the nozzle diameter, the wall combustion portion increases.For nozzle with smaller orifice,a weak light near the nozzle can be seen at the middle and end of combustion.It indicates that some leakages have happened at that time.The results also show that bigger orifice has higher IMEP and higher mean cylinder temperature,which can result in higher NOx emissions.Therefore,bigger nozzle orifice diameter has an active effect on engine thermal efficiency.In our experimental condition,the injection timing almost has no influence in the ignition delay and combustion duration.However,with delaying the injection timing,the temperature in cylinder will increase in this experimental engine.
