This method can gain the very precise description about the nozzle’s flow scene.

这种方法可以得到对喷嘴流场很精确的描述。

Using convergence-expanding nozzle, the transonic gas flow can be realized by the change of theflow channel area in the nozzle only.

借助收敛-扩张喷管，使天然气流仅通过流道面积的变化即可实现跨音速流动。

Large numbers of contrast experimentation is carried on about the effect injection pump, nozzle and nozzle protruded height to emission. A optimization matching scheme is found for combustion chamber in order to reduce emissions.

对不同的喷油泵,供油提前角、喷油嘴、启喷压力、油嘴凸出高度进行了大量的对比试验,找出优化匹配燃烧室降低排放的最佳措施。

Two phases atomizing nozzle and parallel board electrostatic precipitator were designed.

设计了适用于等离子喷涂工艺的二相流雾化喷嘴和平板式静电收集器。

Being as an essential component in microfluid control systems, a piezoelectric valve-less nozzle/diffuser micropump can transport micro flow rate accurately.

收缩管/扩张管型无阀压电微泵可以实现微小流量流体的精确输运,是微流控系统的重要组成部分。

Machining roads namely is moving track of the nozzle. Proper machining roads can reduce machining time and improve surface quality of the product.

加工路径就是喷头运动的轨迹,合理的加工路径可以减少零件制作的时间,改善零件的质量。

Lateral configurations are widely used in petrochemical，fossil and nuclear plants. Because of the sociality of the structure，the strength of vessel will be weakened more seriously by the oblique nozzle connection than by normal connections with the same geometrical parameters.

斜接管在连接处的应力集中要比具有相同结构参数的正交接管结构大得多。

Besides, working solution was used as the materials in this simulation. The research carried out in this paper was very important and instructive to the fluid-dynamic theory study of sieve-plate extraction column and nozzle designing.

本课题在前人研究工作的基础上,对筛板萃取塔筛孔液液流场进行了仿真研究,并且对筛孔结构进行改进,同时在模拟中选取了现场工作液作为模拟物系,因此课题的研究对筛板萃取塔流体动力学的理论研究和筛孔的设计具有一定的指导意义。

The spray quality, on a great extent, depended on the carefiul selection of nozzle types and nozzle quality.

喷雾质量的高低，在很大程度上决定于喷头类型的选择和喷头本身的质量。

And nozzle design includes downstream and upstream optimum.

喷口设计包括喷口下游和喷口上游的优化设计两方面。

This problem can be divided into three subproblems: nozzle allocation, feeder distribution and component placement sequence problem.

该问题可以分解成吸嘴选择、吸嘴分配、供料器分配和元器件贴装顺序优化四个子问题。