throat section

The calculation formulas for velocity coefficients φ_2 and φ_5 for the throat and throat inlet section were deduced from the theoretical research on the velocity coefficients in time-averaged basic equations by use of the unsteady momentum equation and time-averaged value calculation method.

运用非恒定的动量方程和时均值计算方法，对脉冲液体射流泵时均值基本方程中的流速系数进行了理论研究，推导出了喉管和喉管进口段流速系数φ2和φ5的计算式。

The calculation results gave the temperature profile of the throat section and its variation law, and predicted the influences of the related factors on the throat deposition. The analysis results well accord with the experimental phenomena.

计算分析结果给出了喉部截面温度场及其变化规律，并从理论上予示有关因素对喉部沉积的影响，与实验规律一致。

The results show that it is suitable to apply high purity corundum brick and corundum-chrome brick on the combustion chamber and the throat section of the reactor.

分析认为，在燃烧室和喉管采用高纯刚玉砖和铬刚玉砖，反应段和急冷段采用高纯刚玉砖较好；

Nozzle flow field of SRM was numerically simulated with Fluent software. The effects of nozzle convergent half angle, radius of curvature on upstream of throat section and length of throat cylinder on flow field are investigated.

用Fluent计算流体力学软件对固体火箭发动机喷管流场进行了数值计算，研究了喷管收敛半角、喷管喉部上游圆弧曲率半径和喉部圆柱段长度对喷管流场的影响。

Two dimensional flow fields in different nozzles, with equal section throat area and different section length have been simulated. The change of sonic line with the section length, and optimum length of the section have been given.

模拟得到了喉部具有不同等截面段长度的二维喷管流场，指出了音速线随该长度的变化规律和等截面段最佳长度。

The results showed that the ratios of entrance section, throat section and export section of different venturi pipes are different, the effects of descend pressure and rise pressure are also different, furthermore, the influence of fuel economy of diesel is different too.

试验结果表明，文丘利管的进口截面、喉部截面以及出口截面之比不同，所产生的压降和扩压效果不同，而且对柴油机经济性能的影响也不同。

The calculation and experiment results show that the maximum lifting pressure performance decreases with the increase in throat diameter of channel of variable section, water flux of low pressure and pressure ratio of steam nozzle, and has its minimum value with water nozzle annular space.

计算及研究表明：极限升压能力随变截面混合腔喉部直径、被升压的低压水流量和蒸汽喷嘴压比增加而降低，随环形水喷嘴间隙的变化出现了最小值；

A Calculation Method for Throat Section of Turbocharger Turbine Volute

一种增压器涡轮箱0-0截面计算方法

The improved big throat pipe forms a section of internal spiral pipe component, which is favorable to improve the quality of the oil atomization.

大喉管经改进后构成一段内螺旋管件，有利于提高油的雾化质量。

The experimental results indicate that there is a strong flow turbulence region each in the middle of section ⅵ near the downstream of the geometrical throat and in the section ⅳ downstream of the lip flow separation separately.

实验结果表明，在唇口分离区再附着点下游的靠近唇口壁面和在几何喉道下游邻近的通道截面中部，各有一个强的气流总压脉动区，其最大紊流度达0.0825；

Hot-jet is divided into two streams when the aspect ratio at nozzle throat section ( ARt) becomes 2.

在收扩喷管喉道宽高比（ARt）为2时，热射流被分成两股。

Discussion on Signal Layout of Throat Section in Four-aspect Automatic Block Marshalling Yard Reconstruction

关于编组站四显示自动闭塞改造工程中咽喉区段信号机布置方案的讨论