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溫度對柴油和二甲醚噴射系統(tǒng)性能的影
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of Diesel and DME Injection System Performances at Different Temperatures
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    摘要:

    針對普通油泵—油管—油嘴燃油系統(tǒng)，建立了噴射系統(tǒng)的數(shù)學(xué)模型。對不同溫度下柴油和二甲醚噴射系統(tǒng)性能進(jìn)行了數(shù)值模擬。研究表明：在相同溫度下，二甲醚噴嘴壓力的上升和下降速率、壓力峰值都比柴油低，20℃時(shí)二甲醚較柴油下降51.1%，50℃時(shí)較柴油下降45.2%，噴射速度和累積噴油量均遠(yuǎn)低于柴油，針閥開啟時(shí)刻較柴油明顯延后；在最大速度點(diǎn)，20℃和50℃時(shí)二甲醚分別較柴油下降38.8%和36.8%。隨著溫度的升高，柴油和二甲醚的噴嘴壓力、噴射速度下降，針閥開啟時(shí)刻延遲，且柴油的索特平均直徑明顯減小。

    Abstract:

    The mathematical model is established for the conventional pump-pipe-injector fuel system. Through the numerical simulations on diesel and DME injection systems, the effects of temperatures on these two injection systems are disclosed, and their differences are illustrated. At the same temperature, line peak pressure and the rate of pressure increase and decrease for DME are lower than that for diesel fuel. Pressure of DME drops 51.1% and 45.2% than that of diesel at 20℃ and 50℃. DME injection rate and cumulative volume flow through nozzle orifice are much lower than that of diesel. The open timing of nozzle is delayed. DME peak rate drops 38.8% and 36.8% than that of diesel at 20℃ and 50℃. With the increase of temperature, the diesel and DME pressures in nozzle, injection rate and SMD all decrease, and the open timing of nozzle is delayed. 

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趙雪菲,李孝祿,方曉敏,特木樂.溫度對柴油和二甲醚噴射系統(tǒng)性能的影[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2009,40(6):10-15. of Diesel and DME Injection System Performances at Different Temperatures[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(6):10-15.

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