循環(huán)噴油量對(duì)噴油器各孔噴油特性影響的模擬與試驗(yàn)研究
發(fā)布時(shí)間:2019-04-25 13:13
【摘要】:柴油機(jī)的噴油過(guò)程對(duì)缸內(nèi)的燃油霧化、油氣混合及燃燒有重要影響。運(yùn)用雙流體模型及空穴模型對(duì)某兩氣門柴油機(jī)用非均勻布置的5孔無(wú)壓力室噴油器進(jìn)行數(shù)值模擬,計(jì)算分析了循環(huán)噴油量對(duì)各孔噴油特性的影響;實(shí)測(cè)了該5孔無(wú)壓力室噴油器各孔的噴油規(guī)律和循環(huán)噴油量。各孔噴油規(guī)律的模擬值與實(shí)測(cè)值吻合較好。研究結(jié)果表明:循環(huán)噴油量增加,各孔噴油速率及流量系數(shù)也增加,但各孔平均流量系數(shù)的不均勻系數(shù)不受影響,說(shuō)明各孔間流量系數(shù)的差異是噴孔布置結(jié)構(gòu)的不同導(dǎo)致的。
[Abstract]:The injection process of diesel engine has an important influence on fuel atomization, oil-gas mixing and combustion in cylinder. A two-fluid model and a hole model were used to simulate a 5-hole non-pressure chamber injector used in a two-valve diesel engine. The influence of circulating fuel injection quantity on the injection characteristics of each hole was calculated and analyzed. The injection law and circulating injection quantity of each hole of the 5-hole non-pressure chamber injector are measured. The simulated values of the injection law of each hole are in good agreement with the measured values. The results show that the injection rate and flow coefficient of each hole increase with the increase of circulating fuel injection, but the non-uniform coefficient of the average flow coefficient of each hole is not affected, which indicates that the difference of flow coefficient between the holes is due to the different arrangement structure of the nozzle.
【作者單位】: 貴陽(yáng)學(xué)院機(jī)械工程學(xué)院;江蘇大學(xué)汽車與交通工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(51476072,51366002) 貴州省科學(xué)技術(shù)基金項(xiàng)目(黔科合LH字[2014]7186號(hào)) 江蘇省博士創(chuàng)新基金(CXLX13_654,CXZZ12_0674)
【分類號(hào)】:TK423
本文編號(hào):2465131
[Abstract]:The injection process of diesel engine has an important influence on fuel atomization, oil-gas mixing and combustion in cylinder. A two-fluid model and a hole model were used to simulate a 5-hole non-pressure chamber injector used in a two-valve diesel engine. The influence of circulating fuel injection quantity on the injection characteristics of each hole was calculated and analyzed. The injection law and circulating injection quantity of each hole of the 5-hole non-pressure chamber injector are measured. The simulated values of the injection law of each hole are in good agreement with the measured values. The results show that the injection rate and flow coefficient of each hole increase with the increase of circulating fuel injection, but the non-uniform coefficient of the average flow coefficient of each hole is not affected, which indicates that the difference of flow coefficient between the holes is due to the different arrangement structure of the nozzle.
【作者單位】: 貴陽(yáng)學(xué)院機(jī)械工程學(xué)院;江蘇大學(xué)汽車與交通工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(51476072,51366002) 貴州省科學(xué)技術(shù)基金項(xiàng)目(黔科合LH字[2014]7186號(hào)) 江蘇省博士創(chuàng)新基金(CXLX13_654,CXZZ12_0674)
【分類號(hào)】:TK423
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