喷射

In this paper, based on the specific CNG engine parameters and characteristics, the influence of the injection timing, ignition energy and lean combustion for the engine is tested, in order to explore the control rules of fuel injection, ignition energy and lean combustion and then draw the following conclusions: small injection advance angle of electronic controlled injection CNG engine is optimum

文章根据天然气发动机的具体参数和特性，探索电控喷射CNG发动机在燃料喷射、点火能量和稀燃等方面的控制规律，确定最优的控制参数，开展了喷射定时、点火能量及稀薄燃料等参数对发动机性能影响的试验研究工作，并根据试验结果分析，得出了以下结论：电控喷射WT615CNG发动机燃料喷射提前角要小些为宜

The coagulant is used in the following steps: 1. feeding certain amount of coagulant into compressed air pipeline to atomize; and 2. conveying the atomized coagulant to nozzle for spraying together with wet sprayed material.

使用上述湿式喷射料用促凝剂的方法包含以下步骤：(1)将一定数量的所述促凝剂输送入压缩空气管道作雾化处理；(2)将雾化处理后的促凝剂输送至喷嘴与湿式喷射料混合后喷射出去。

The purpose of the invetion is to effectively stop the blowoff of an injected fuel into an exhaust port when the opening and closing of valves are overlapped with each other by properly setting the fuel injection direction of a fuel injection device mounted so as to face the intake passage of an internal combustion engine.

提供一种内燃机的进气结构，适当设定被安装成对着内燃机的进气通道的燃料喷射装置的燃料喷射方向，有效防止在气门开闭动作时间的重合期间朝向排气口的喷射燃料的喷泄。

Based on the variable separation method, the governing equations for the film thickness problem have been solved. A reasonable consistent condition of the momentum equations has been found and solved. Based on the methods ofmathematical physics, series expansion solution of the velocity filed in the film has been derived. A boundary condition at the boundary of the spray area was given and the velocity slip phenomenon has been considered.

基于电子器件喷雾冷却技术的研究现状和研究热点，本文对喷雾在热源表面形成的冲击液膜流动及厚度模型、基于CHF(Critical Heat Flux，临界热流密度)准则的倾斜喷射喷嘴轨迹、喷嘴距热源换热最优时的高度、倾斜喷射实验以及针对动态喷射的电磁驱动器件的吸合问题等方面进行了研究：针对圆锥形轴对称喷雾冷却系统，在对喷雾区域进行划分的基础上，引入滑流边界条件，在提出圆锥状喷雾假设的基础上，建立了喷雾区域雾滴密度连续介质等效模型。

Based on the BISQ model, we studied the elastic wave speed in two-phase porous isotropic media and its relation with Biot-flow and squirt-flow. The Green function is obtained for a point load in the two-phase porous isotropic media using the decomposition of the field potencial and the properties of Delta function. The expression and effects of squirt-flow in BISQ-Green function are discussed.

以BISQ模型的波传播方程为基础，研究了弹性波在孔隙各向同性介质中的传播速度及与流体的Biot流动和喷射流动力学机制的关系，进一步利用场势分解和δ函数的性质，给出了同时受Biot流动和喷射流动两种动力学机制作用下，两相介质波场位移在集中力作用下的Green函数，并讨论了喷射流动在Green函数中的表现形式和作用。

The results show that the characteristics of the injector fit within the range of those reported needle-free injectors.

结果表明，所提出的方法确定液体喷射注射器的设计参数，其相关喷射性能与已报导的国外喷射注射产品的喷射性能较为一致。

The possibility for preparing nanocrystalline materials by jet-electrodeposition technique is also analyzed. Corresponding the research in the article, a set of unsubmerged single circular jets equipment was designed. In chapter 2, jet-electrodeposition was carried out both under direct current condition and pulse current condition. A series of samples for nanocrystalline nickel coating were prepared under different deposition parameters.

在第二章中，采用喷射电沉积技术分别使用直流和脉冲两种波形的电流进行电沉积，改变电沉积工艺参数制备了一系列的纳米晶镍镀层样品，使用X射线衍射、扫描电镜、透射电镜、维氏硬度计等仪器对镀层微观结构和性能进行了分析和表征，主要考察了在直流喷射电沉积和脉冲喷射电沉积方式下，沉积参数如电流密度、电镀液喷射速度等对镀层微观结构和显微硬度的影响。

When the injection pressure is about 0.1MPa, the air flow through the injector becomes critical, so if the swirl level variation reaches the required range, the pressure should be kept as low as possible.

空气射束的喷射压力越大，涡流比的变化范围也越大。而当喷射压力达到0.1MPa左右时，空气在喷嘴内的流动已接近临界状态。因此，射束喷射压力不宜过高，在满足涡流变化要求的前提下，喷射压力应尽量低一些。

Up to now there are a few articles published whether domestically or internationally on the investigation of small-scale ejectors, which are to be used in solar steam jet refrigeration systems. The results of this study have provided something new of the basic knowledge for the optimal design of such sort of ejectors.

目前，国内外对应用于太阳能蒸汽喷射式制冷系统中的微小型喷射器的研究很少，本文所做的工作为以后同类喷射器的设计和优化提供了一定的依据，对改进微小型喷射器的性能、提高喷射器的效率具有一定的指导性。

And through calculating, the values of low-pressure steam extra-flow rate in different power-to-heat price ratios are given. At the same time, the ejector factors in practical process, which also affect the application of the steam ejector pump, are also analyzed.

同时，由于喷射系数直接影响着蒸汽喷射式热泵的应用，本文对喷射系数做了大量的计算和分析，给出了实际工程中常用的喷射系数，对于石化企业的决策可以起到一定的参考作用。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。