喷孔

根据此方法设计的压电微滴喷射装置能实现黏度范围在0～100mPa.s内流体的可控离散喷射，喷射频率为0.4～1kHz，喷孔直径最小为0.08mm。

The new piezoelectric injector provides controllable discrete jetting at frequencies from 0.4 to 1 kHz with a maximum fluid viscosity of 100 mPa · s and a minimum orifice diameter of 0.08 mm .

本文阐述了流体在喷孔中的流动特性。

This paper describes flow charateristic of fluid in orifice .

办理办法：打消起泡来因：答弄不净显影液喷孔。

Treatment methods : Bubble : the orifice should be fluxing developering .

对几何参数的模拟主要研究了不同喷孔K系数对流场内部的影响。

The simulation about the geometrical parameters is to research the nozzle inside influence of different K coefficients .

使用Nd∶YAG激光在平板试样上进行了精密环切喷油嘴喷孔的前期实验研究。

The experimental study of fine trepanning drilling hole on plane sample by Nd ∶ YAG laser was carried out .

钻孔喷孔的控制可通过留设10m以上的安全岩柱、在孔外安装导喷系统以及改进喷孔时的钻进工艺来实现。

Blowout can be controlled by setting safety rock pillar over 10m , installing blowout-leading system in orifice and improving drilling process .

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，NOx的排放量有明显的影响。

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 .

运用基于欧拉多流体法的多相流模型，通过全自动网格生成技术，对喷孔内部的流动进行了多维CFD数值模拟。

Dependent on an automatically generated unstructured grid , the multidimensional CFD numerical simulations are performed on both of them with the multiphase flow model based on an Eulerian multi-fluid approach .

对发动机喷油系统参数对二甲醚（DME）喷雾燃烧过程的影响进行了实验研究，包括喷孔直径和喷油提前角对喷雾燃烧过程的影响。

The influence of injection parameters including the nozzle diameter and injection timing on the spray and combustion process of dimethyl ether ( DME ) was investigated .

试验结果表明，适当增加侧向喷孔数目和侧向喷孔长径比有利于改善TR燃烧系统的排放性能。

The experimental results show that a proper increase of the nozzle side hole number and length-diameter ratio of nozzle side hole benefit the emission performance improvement of TR combustion system .

针对燃油喷射过程中的喷油提前角和喷孔锥角两个因素，本文应用三维CFD仿真软件AVLFIRE对CY4102直喷式柴油机的燃烧过程进行了数值模拟计算。

In this paper the CFD simulation software AVL FIRE is introduced to simulation combustion process of 4102 DI diesel engine in connection with the fuel injection advance angle and nozzle hole cone angle of fuel injection system .

在发动机模拟软件AVLboost上使用均匀试验设计方法安排了不同水平的喷孔直径、喷油压力、喷油提前角和燃烧室压缩比对柴油机性能影响的模拟试验。

By using uniform design experimentation , a simulation test based on AVL boost was done to study the influence of nozzle diameter , injection pressure , injection timing and compression ratio on performance of diesel engine .

当背压大于LPG的临界压力时，两种混合燃料的喷雾贯穿距离和喷雾锥角均随喷射压力的上升、喷孔直径的增大而增大；

When the back pressure is larger than the LPG critical pressure , the spray penetrations and spray cone angles of both LPG / diesel fuel blends manifest to increase with the increase of injection pressure and nozzle hole diameter .

此外，增大涡流比和减小喷孔直径有利于提高缸内气流运动速度、扩大高温区域，降低碳烟排放，但使NOx排放升高。

It is discovered that lager swirl ratio and smaller injector nozzle tends to promote the movement of the in-cylinder charge , extend the high-temperature region and reduce soot emissions . While at the same time NOx emissions were increased .

试验结果表明，高压喷射时，随喷孔数增加，喷孔直径减少，颗粒排放显著下降，油耗降低，但NOx的排放增加。

The result of examination shows that in the case of high injection pressure the particulate emission can be decreased significantly and fuel consumption decreased too with increasing the number of nozzle hole and decreasing the size of nozzle hole , while NO_x emission increased .

通过两组试验结果的一致性分析，标定出用平板法测量喷孔喷油速率过程中的最佳喷射距离与最优喷射角：最佳喷射距离为5mm；最优喷射角为900。

Through the consistency analysis of the two test results , optimal injection distance and injection angle were calibrated completely in the process of measuring the injection rate of nozzle with flat plate method .

喷孔直径由0.5mm增大到1mm时，喷雾贯穿距离减少约6000/，空心锥角增大7.5倍；

When the nozzle diameter increases from 0.5 mm to 1 mm , the spray penetration distance decreases by 600 / 0 and the hollow spray cone angle increases by 7.5 times .

经过匹配比较，优选的孔径为（0.21mm。3）、喷油器喷孔夹角。

Because of experiment matching conclusion , Optimizing diameter of nozzle is ( 0.21mm . 3 )、 Angle of nozzle .

利用此模拟计算结果，可以揭示气缸内气体背压和气体温度、喷射压力、喷孔直径及Sauter平均直径对喷注贯穿距离、喷雾锥角的相互关系。

This fuel spray Simulating calculation can reveal the relations among penetration , spray cone angle , injection pressure , gas back pressure and temperature in the cylinder , nozzle diameter , Sauter mean diameter , etc.

在相同喷油提前角（11oCA和13oCA）下，缸内最高燃烧压力随着喷孔直径的增大先降低，再升高，最后又降低；缸内NOX的排放量随着喷孔直径的增大而减少。

In the same advanced injector crack angle ( 11oCA and 13oCA ), the maximum in-cylinder combustion pressure decreases , then goes up , and finally declines with the nozzle diameter increases .

模拟结果显示各喷嘴加捻室中的气流旋转特征非常明显，并随着喷孔角度的增大，A-A截面的切向速度和径向速度增大，而轴向速度减小。

Simulation results show that , the rotating characteristics of the air in the twisting chamber were very obvious . With the spray angle increased , the tangential velocity and radial velocity increased , but the axial velocity was decreased .

新设计的氧枪喷孔数为5孔，喷孔孔型为近似Laval型，且布置在喷头端面的同一圆周上，喷孔倾角分别选取13°和15°。

The new type oxygen lance has 5 jets , and the jets are arranged on the same circumference of spray nozzle end . The shape of jet is similar to Laval-shape , and the dip angles are 13 ° and 15 ° respectively .

钻孔喷孔的诱导可通过增大钻进水压（10～15MPa）、增大钻孔直径（90～100mm为宜）来实现。获得了喷孔孔洞周围煤体的移动变形及应力分布规律。

Blowout can be induced by increasing water pressure in drilling ( 10 ~ 15MPa ) and enlarging the borehole diameter ( 90 ~ 100mm ) . The displacement and stress distribution law around the blowout borehole is analyzed .

选择影响纱线气圈转速的因素，即选择喷孔直径、纱道直径、气压等为变化因子，利用二次回归正交设计实验，得到关于纱线毛羽（≥3mm）指数的二次回归方程。

The jet orifice diameter , twisting chamber and nozzle pressure which affect rotational equation of yarn ballons are selected for changing factors . The experiment is design by utilizing orthogonal regression design and regression equation about the yarn hairiness index (≥ 3mm ) is achieved .

喷油嘴喷孔内口圆角对柴油机性能的影响

Effect of Injector Orifice Inside Opening Corner on Diesel Engine Perfor-mance

柴油机喷油器喷孔空泡雾化的研究

The Study on Injector Nozzle Cavitation Atomization in a Diesel Engine

带式自动纸带穿孔机喷孔为节点式微喷带的水力特性初步研究

Primary study on hydraulic characteristics of punched thin-soft tape for micro-spraying

多喷孔射流的三维紊流数值模拟及消能分析

3-D numerical simulation and analysis on energy dissipation of multiple jets

而且随喷孔总面积的增加，喷油持续期和燃烧持续期均缩短。

Consequently the post-combustion duration shortens and the fuel economics increases .

涡流室式柴油机起动喷孔作用机理探讨

On Function of Starting Hole in a Swirl Type Diesel engine