喷油器喷孔入口圆角对燃油流动影响的研究
|
摘要
柴油机喷油器流道内部的流动状态直接影响到燃油的雾化程度,直接影响柴油机的工作性能与排放指标。为深入研究柴油机喷嘴喷孔内部流体特征,我们以某船用大功率柴油机喷油器作为研究对象,采用三维仿真软件Fluent对燃油在喷油器油嘴内部的流动状态进行了数值模拟。结果表明:喷油器喷孔入口处不同的圆角半径将直接影响到燃油空化程度,这对后续燃油的雾化程度以及喷油器的寿命产生重大影响。
The flowing state of diesel inside the injector flow channel directly affects the atomization of the fuel and directly affects the performance and emission targets of the diesel engine. In order to further study the internal fluid characteristics of the nozzle orifice of a diesel engine, this paper takes a marine high-power diesel injector as a research object. The three-dimensional simulation software Fluent is used to simulate the flow of fuel in the injector nozzle. The results show that different fillet radii at the inlet of the injector will directly affect the degree of fuel cavitation, which will have a significant impact on the degree of atomization of the subsequent fuel and the life of the injector.
The flowing state of diesel inside the injector flow channel directly affects the atomization of the fuel and directly affects the performance and emission targets of the diesel engine. In order to further study the internal fluid characteristics of the nozzle orifice of a diesel engine, this paper takes a marine high-power diesel injector as a research object. The three-dimensional simulation software Fluent is used to simulate the flow of fuel in the injector nozzle. The results show that different fillet radii at the inlet of the injector will directly affect the degree of fuel cavitation, which will have a significant impact on the degree of atomization of the subsequent fuel and the life of the injector.
引文
[1] Christer Wik.Tier III technology development and influence on ship installation and opration[C].CIMAC, 2013:159.
[2]谢方喜.柴油机燃油射流运动行为特点及对燃烧的影响研究[D].吉林:吉林大学,2010.
[3] Payri F., V.Bermudez, R.Payri,et al.The Influence of Cavitation on the Internal Flow and the Spray Characteristics in Diesel Injection Nozzles. Fuel[J], 2004, 83(4):419-431.
[4]董庆兵.柴油机喷油器喷孔内空化特征及机理研究[D].天津:天津大学,2016.
[5]隆武强,冷先银.柴油机燃烧探索[J].柴油机,201032(3):1-7.
[6]郭立新,杨海涛,夏兴兰,等.喷油器结构对喷雾特性影响计算分析[J].现代车用动力,2012,(3):14-22.
[7]郑书杰.16V280ZJ型柴油机燃油喷射系统改进及模拟仿真研究[D].大连:大连交通大学,2008.
[8]汪翔,苏万华.空化过程对柴油喷嘴内流特性的影响[J].内燃机学报,2007,25(6):481-487.
[9]杜雨辰,晏飞,张建,等.人口压力对船用喷油器喷嘴内部空化流动的影响[J].机械研究与应用,2016,(2):1-6.
[10]董庆兵.柴油机喷油器喷孔内空化特征及机理研究[D].天津:天津大学,2010.
[11]汪翔,苏万华.利用双流体模型研究柴油高压喷嘴内部的空化流动[J].科学通报,2008, 53(15):1864-1870.
[2]谢方喜.柴油机燃油射流运动行为特点及对燃烧的影响研究[D].吉林:吉林大学,2010.
[3] Payri F., V.Bermudez, R.Payri,et al.The Influence of Cavitation on the Internal Flow and the Spray Characteristics in Diesel Injection Nozzles. Fuel[J], 2004, 83(4):419-431.
[4]董庆兵.柴油机喷油器喷孔内空化特征及机理研究[D].天津:天津大学,2016.
[5]隆武强,冷先银.柴油机燃烧探索[J].柴油机,201032(3):1-7.
[6]郭立新,杨海涛,夏兴兰,等.喷油器结构对喷雾特性影响计算分析[J].现代车用动力,2012,(3):14-22.
[7]郑书杰.16V280ZJ型柴油机燃油喷射系统改进及模拟仿真研究[D].大连:大连交通大学,2008.
[8]汪翔,苏万华.空化过程对柴油喷嘴内流特性的影响[J].内燃机学报,2007,25(6):481-487.
[9]杜雨辰,晏飞,张建,等.人口压力对船用喷油器喷嘴内部空化流动的影响[J].机械研究与应用,2016,(2):1-6.
[10]董庆兵.柴油机喷油器喷孔内空化特征及机理研究[D].天津:天津大学,2010.
[11]汪翔,苏万华.利用双流体模型研究柴油高压喷嘴内部的空化流动[J].科学通报,2008, 53(15):1864-1870.