1、

The combustion process in the combustion chamber was simulated by use of KIVA-ⅱ code for direct-injection diesel engine. The fuel vapor quantity and combustion temperature and NOx concentration were calculated through changing the size of the nozzle hole.

利用KIVA-Ⅱ程序模拟计算直喷式柴油机燃用柴油时缸内的燃烧过程,如混合气形成过程、缸内温度场、主要有害物质NOx的生成浓度分布等。

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2、

The results show that injection timing, total nozzle hole area, inlet water temperature and inlet air temperature have obvious effect on exhaust value of CO, HC and NOx.

试验结果表明,喷油提前角、喷孔总面积、进水温度及进气密度对CO,HC,NO x的排放量有明显的影响。

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3、

In order to gain ideal spatial distribution of fuel vapor, the swirl ratio should be decreased with increasing number of nozzle hole.

为了获得理想的燃油蒸气空间分布,涡流比的匹配值应随着喷孔数的增加而逐渐减小;

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4、

the cavitating flow in a nozzle hole is thought to be a very important factor to affect diesel fuel spray characteristics.

柴油机喷嘴内部空穴流动是影响喷雾特性极为重要的因素。

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5、

a measuring method for nozzle hole depth in cylinder-head

柴油机气缸盖喷油嘴孔深度的一种测量方法

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6、

ratio of nozzle hole length nozzle diameter

喷嘴锥体喷孔长径比

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7、

The reasonable combination of nozzle hole number, impingement angle and valve opening pressure is very important to the new conical spray.

喷孔数、碰撞角度和启喷压力三者的合理配合对第三代伞状喷雾至关重要。

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8、

finite element analysis, strength evaluation and reparation of the offset nozzle with offset hole

偏置偏心开孔接管有限元应力分析、强度评定与修复

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9、

And draft the on-the-spot experiment through the indoor experiment, every parameter of the lead impeller nozzle such as efflux pressure, target distance, attack time parameter to hole influence is analyzed.

通过室内实验和拟现场实验,设计内导叶轮喷头,分析内导叶轮喷头各参数及射流压力、靶距、打击时间等参数对钻孔作业的影响。

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10、

The nozzle equipment is at the bottom of the valve seat; the valve spool has a balancing hole; the valve spool bush has an orifice.

喷嘴装置在阀座下端,阀芯设置有平衡孔,阀芯套开设有节流孔。

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11、

After pointing out the problems resulted from the mixed tubing& casing fracturing, this paper presents three kinds of improvement methods: sand settling in rat hole, nozzle adjustment, and time closing of valve.

指出了油套混压存在的问题,提出了三种工艺改进办法:口袋沉砂法、嘴子调节法和定时关阀法。

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12、

For the first part, regard leakage hole as convergent nozzle and drainage through leakage hole can be got according to equation of continuity.

对第一部分,把泄放孔等效为收缩喷嘴,根据连续性方程得到经过泄放孔的泄漏。

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13、

If other factors remained unchanged, the hole diameter and the slot width increased with decreasing laser energy intensity and increasing nozzle diameter, the machining surface is not plan and the machining depth are slow.

当其它试验条件不变时,喷嘴直径越大,水导引激光能量密度越小,加工孔径和槽宽越大,加工深度越浅,加工的表面质量越差。

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14、

the present invention relates to a fuel-injection valve for an internal combustion engine, including a nozzle (1) with a hole (2);

一种用于内燃机的燃料喷射阀,带有:带有孔(2)的喷嘴体(1);

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15、

The methods of inlet channel of laval nozzle and smaller area of vent hole have been put forward to limit the spin rate of turbine generator.

提出选用拉伐尔管式进气道、和较小的排气孔面积的方法来限制涡轮发电机的转速。

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16、

a perforated nozzle for spraying water from a hose or sprinkling can. study on the fuel injection rate of a multi-hole injector applied to a direct injection gasoline engine

莲蓬式喷嘴一种使水从管子或喷水壶里喷洒出来的有孔的喷嘴直喷汽油机多孔喷油器的喷油规律研究

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