查询词典 nozzle

Based on the theory analysis and experiment work, the paper studies the humidifying property of the centrifugal nozzle with firing pin type, high pressure and little aperture. Compared with the traditional air washer, the high efficiency and energy saving character of this kind of nozzle is stood out.

课题从理论和试验两方面分析研究了撞针型高压小孔径离心式喷嘴的雾化加湿性能，并将其与传统喷水室加湿系统进行能耗比较，突出了撞针型高压小孔径离心式喷嘴高效节能的特点。

An adaptive grid scheme controlling cell area is used to generated grids in the divergent section of symmetric annular nozzle, and the generated grids are used in the flowfield calculation through the uncoupled way. The elliptic equations are used to generate grids in three dimensional regions of FDN divergent section, the source terms used in the equations employ a mathematical form which is independent of the boundary shape and of the boundary grid point distribution, the free parameters contained in the source terms are determined by the two restraint conditions, the intersection angle of transverse grid lines with boundaries and the local curvature of the transverse grid lines at the boundaries, and the interior grid distribution controlled directly by the grid point distribution assigned on the boundaries is realized, it makes the grid more clustering near the nozzle wall. For the generated grids in the whole computational regions have a good smoothness and orthogonality, the accuracy of calculation in the flowfield is ensured.

对轴对称的环形喷管采用控制网格面积的自适应网格方法对扩散段部分进行了网格生成，并通过非耦合方式应用于喷管的流场计算中；对强制偏流喷管扩散段内的三维区域采用椭圆型方程进行网格生成，方程中的源项采用了与边界形状和边界网格点分布无关的数学形式，源项内的自由参数由横向网格线与边界的交角及横向网格线在边界处的局部曲率两个约束条件来确定，实现了由边界上的网格分布直接控制内部的网格点，使壁面附近具有较密集的网格，并且在整个计算区域内的网格都具有良好的光滑性和正交性，从而保证了流场计算的准确性。

The nozzle of the gasifier is simplified. The cold-flow field in the gasifier chamber is studied. The research shows that the chamber has recirculation along the whole length. The particles in the chamber perform a very good flowing characteristics even for the large particles of dp=150μm, and no abrupt change is observed. This is due to the operational pressure is high and the density of the gas is large there. The maximal reflux velocity of both phases, the reflux intensity, the concentrational distribution of particles, and the static pressure loss in the chamber are all related to following factors: the load of gasifier, the concentration of coal-water slurry, the diameter of the coal particle, the distribution ratio of oxygen in the two channels of the nozzle, and the angle of jet in nozzle.

本文对水煤浆气化炉喷嘴进行了简化处理，在此基础上，对气化室内的冷态流动过程进行了研究，发现：整个气化室都处于流动的回流区长度范围以内；水煤浆气化炉中，由于操作压力很高，气相密度很大，所以即使对于dp=150μm的较大煤颗粒，其对流体的跟随特性也很好，没有发生流动特性突跃的现象；两相的最大回流速度、回流强度，颗粒相的浓度分布，以及气化室内的静压力损失等，均与气化炉的负荷、水煤浆浓度、煤粒直径、O2在喷嘴两个流道中的分配比例、以及喷嘴的射流角等参数有关。

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To reveal aft end internal flow feature of a solid rocket motor with submerged nozzle, a two dimension cold flow test model with rectangular channel was designed The cold gas simulation was based on geometric similarity and aerodynamic analogy Mean and fluctuating velocity field was measured using phase doppler particle analyzer It showed that the flow separates at upstream of the submerged nozzle and reattaches on the tip of the nozzle nose A relatively steady recirculation zone formed in...

为了揭示含潜入喷管的固体火箭发动机尾部流动特征，按照几何相近和气动相似原则设计了通道为矩形的二维冷流实验模型，利用相位多普勒粒子分析仪对燃烧室尾部气流的时均速度和湍流脉动速度进行了测量。实验结果表明气流在潜入喷管入口上游发生分离，再附点位于喷管前端部外侧，背壁空腔内形成一个较为稳定的回流区，流场的轴向和横向湍流强度都比较大

Demolition 1.1 The demolition of lifting mechanism 1.1.1 demolition handle pin, handle, fork rod pin, fork rod, valve pin, valve stem and stem nut locking pin; 1.2 regulate the demolition of ring 1.2.1 unloaded ring and nozzle ring adjustment screw, recording the number of alveolar nozzle ring nozzle ring used to turn to the right (anti-clockwise direction) until the stent in contact with the valve flap, recording the number of rotating shafts of the methods.

拆卸 1.1 提升机构的拆卸 1.1.1 拆手柄销、手柄、叉杆销、叉杆、阀销、阀杆锁紧销及阀杆螺母； 1.2 调节环的拆卸 1.2.1 卸下调节环和喷咀环的固定螺丝，记录喷咀环的齿槽数采用将喷咀环向右转（反时针方向直至与阀瓣支架相接触，记录所旋转的槽数的方法来实现。

A fluid cartridge has a top wall to which the nozzle assembly may be secured, and a supply of pressurized air is connected to the nozzle assembly to draw fluid from the reservoir into the nozzle assembly through a siphon tube by a venturi action.

一流体储盒具有一顶壁，喷嘴组件可固定于该顶壁，一压缩空气供给源连接于喷嘴组件，用以通过一虹吸管利用文丘里作用将流体从贮存器吸入喷嘴组件。

GB/T2624--936 and production in line with ISO5167 - 1 standard expenditure devices, including pressure Kok access standard orifice, the standard nozzle, the flange pressure from the standard orifice, the trail from pressure from the standard orifice, the length of the nozzle And Venturi tube and cultural Venturi nozzle, double orifice, eccentric orifice, missing a round orifice, cone-shaped entrance orifice, the first-orifice, Pitot Venturi tubes, nozzles, such as the speed of sound. OVAL Co., Ltd.

生产符合GB/T2624--936和ISO5167--1的标准节流装置；包括角接取压标准孔板、标准喷嘴、法兰取压标准孔板、径距取压标准孔板、长径喷嘴以及文丘里管和文丘里喷嘴、双重孔板、偏心孔板、圆缺孔板、锥形入口孔板、端头孔板、皮托文丘里管、音速喷嘴等。

Through an analysis on mud-clogging mechanism of suction nozzles on wet type sweeper, a concept is suggested, that water ratio in dust nearing the wall of suction nozzle duct should be decreased so the mud stickiness can be controlled under a critical value and not sticking to the duct wall whereas water ratio in central dust passage of the duct is properly increased to satisfy effective dust absorbing. On the basis of the concept, a water spraying device is designed with improvement for suction nozzles. In the device, the water hole numbers, diameters and distribution along the nozzle circumference as well as initial direction of water spraying are all determined according to concrete suction nozzle structures.

通过对湿扫型道路清扫车的吸嘴易被泥土堵塞的机理分析，提出降低吸嘴流道近壁的尘土的含水率，控制泥块的黏性处于临界黏性以下，使泥块不黏附于流道壁面；而将吸嘴流道中心部位的尘土的含水率适当加大，以满足有效压尘的解决思路，并根据这种思路改进设计了一种吸嘴喷水装置，按不同吸嘴的具体结构确定孔数、孔径、孔沿圆周的分布规律和喷水的初始方向等要素。

CFD is also used to get the data of performance parameters of the nozzle at different nozzle pressure ratio, different nozzle area ratio and different geometric defected angle.

研究了Jamson提出了中心型有限体积法，并改进了其在边界上的处理，通过验证计算验证了本文发展的矢量喷管三维有粘流动计算程序的正确性。

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％。