循環(huán)噴油量對噴油器各孔噴油特性影響的模擬與試驗研究
發(fā)布時間:2019-04-25 13:13
【摘要】:柴油機的噴油過程對缸內(nèi)的燃油霧化、油氣混合及燃燒有重要影響。運用雙流體模型及空穴模型對某兩氣門柴油機用非均勻布置的5孔無壓力室噴油器進行數(shù)值模擬,計算分析了循環(huán)噴油量對各孔噴油特性的影響;實測了該5孔無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)律的模擬值與實測值吻合較好。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】: 貴陽學院機械工程學院;江蘇大學汽車與交通工程學院;
【基金】:國家自然科學基金資助項目(51476072,51366002) 貴州省科學技術基金項目(黔科合LH字[2014]7186號) 江蘇省博士創(chuàng)新基金(CXLX13_654,CXZZ12_0674)
【分類號】:TK423
本文編號: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】: 貴陽學院機械工程學院;江蘇大學汽車與交通工程學院;
【基金】:國家自然科學基金資助項目(51476072,51366002) 貴州省科學技術基金項目(黔科合LH字[2014]7186號) 江蘇省博士創(chuàng)新基金(CXLX13_654,CXZZ12_0674)
【分類號】:TK423
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