In the whole flow range the impeller operates under subsonic condition and the radial diffuser operates under transonic condition thus the choked mass flow rate is determined by the throat area of the radial diffuser .

整个特性线范围内离心叶轮基本在亚音速情况下工作，而径向扩压器是在跨音速条件下工作，离心压气机整机的最大流量是由径向扩压器的 喉部 面积决定的；

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。

A nozzle with greater length and smaller throat area has greater gross thrust and better efficiency .

②流量匹配后，出口 面积较小、长度较长的二元收敛 喷管总推力和推进效率较高。

A study of the variable throat area precombustion chamber

可变 喉 口 截面预燃室的研究

At peak times of the throat area of occupancy and issued to the line using a very compact increased the difficulty of station operation organization limits the high speed railway section carrying capacity of high-speed rail market competition will produce adverse effect .

在高峰小时 车站 咽喉 区占用和到发线使用非常紧凑，增加了车站行车工作组织的难度，限制了高速铁路区段通过能力，对高铁市场竞争力将产生不利影响。

The conveying parameters were relatively optimized by adjusting the throat area of adjustable Laval nozzle and pressure parameters so that the foodstuff particle breaking rate during pneumatic conveying was decreased at certain extent .

通过调节可调式拉法管的 喉径以及各压力参数实现了输送参数的相对最优，在一定程度上减轻了粮食颗粒在输送过程中的破碎率。

Results show that pintle could change the nozzle throat area and thus the motor pressure and thrust which provided the capability for thrust control .

结果显示 喉栓能够有效改变发动机燃烧室压力和推力，满足发动机推力控制要求。

The throat area of turbine nozzle which is very important in gas turbine engine 's design and manufacture must be controlled strictly .

涡轮导向器 喉 道 面积值是燃气涡轮发动机设计和生产中的重要参数，必须加以严格的控制。

Study of Dense Phase Pneumatic Conveying Mechanism & Application Study Adjustable Throat Area Laval Nozzle

密相气力输送机理研究及可调 拉伐尔管应用研究

The technical difficulty is accurately controlling the low-pressure rotor speed through adjusting nozzle throat area .

技术难点在于通过调节喷管 喉 道 面积，精确控制发动机低压转子转速。

It is shown further by examples that the mass ratio of rocket motor Can be increased and the propellant weight for cut-out can be decreased by selecting a bigger no-dimensional throat area and a smaller angle whenever possible .

通过例题进一步说明，在可能范围内选取较大的反喷管相对 喉 面和较小的倾角，可以提高发动机的质量比和节省推进剂。

An analysis is made of the performance characteristics of the lower pressure waste steam jet refrigeration machine by using the gas dynamic function . The theoretical calculating formulas for specific steam consumption and throat area ratio are also derived .

本文利用气体动力函数分析了低压废汽喷射制冷机的工作特性，并导出了单位耗汽量和 喉部 面积比的计算公式。

Experiment proves that it can improve influx height of condensate pump that adopting large throat area ratio water jet pump .

试验证明，采用大 面积比喷射泵可以提高凝水泵灌注高度。

And water is used in cold test . Through changing operating conditions throat area and back pressure the change rule of discharge coefficient and pressure recovery factor were found .

通过大量冷态试验，在大范围变化工况、变化 喉部 面积及变化背压条件下，利用水对低温流量控制系统进行研究，得到了流量系数、压力恢复系数的变化规律。

Experimental Research of Large Throat Area Ratio Water Jet Pump

大 面积比喷射泵试验研究

The effeets of the throat area ratio and divergent angle on the performance of the two-dimensional type turbulence generator are given .

本文给出了二元紊流发生器的 喉 道 面积比和扩张角对其性能的影响，并建立 喉 道调节规律以指导实验者在台架上的操作。

Based on analyzing the principles of three flow rate modulation projects including varying throat area unchoked nozzle fixed flow the advantages and disadvantages of each project are explained .

在分析了变 喉 面、非壅塞喷管、固定流量等三种方案的调节原理的基础上，说明了每一种调节方案的技术关键以及它们的优缺点。

Based on the interior trajectory calculation model of the launch system the parameters of missile movement and interior trajectory performance are numerated and analyzed for the influence of gas generator nozzle throat area on launch power .

根据发射系统内弹道计算模型，针对燃气发生器喷 喉 面积对导弹发射动力的影响进行导弹运动参数、内弹道性能的计算与分析。

The calculations indicate that the iterating calculation is converged and the calculated throat area of nozzle accords with practicality .

计算结果表明迭代计算是收敛的，算出的喷嘴 喉 口 面积与实际相符。

The area ratio principle in increasing flow rate method is discussed and the formulae for the area ratio value the power of pump and the throat area are presented when the width of the impeller outlet is increased .

对加大流量法中的面积比原理进行探讨，得到了加大叶轮出口宽度b2后与叶轮匹配的 喉部 面积、轴功率及面积比值的表达式。

The results of numerical and experimental studies of a new configuration of 3D hypersonic inlet with the minimum throat area which was called a convergent inlet are presented in this paper .

介绍一种新型的、具有最小 喉 道 面积的三维高超声速进气道（称之为收敛形进气道）的数值和实验研究结果。

Improved design of double volute and throat area research of performance influence for a certain centrifugal pump

双蜗壳离心泵设计及 喉部 面积对性能的影响

Influence of Gas Generator Nozzle Throat Area on Missile Launch Power

燃气发生器喷 喉 面积对导弹发射动力的影响

In the study of the operating system used system analysis method divided the receiving yard operating system into the accept train side throat area system the hump yard throat area system and hump shunting operating system .

在对到达场作业系统的研究中，运用系统分析的方法，将到达场作业系统分为接车端 咽喉 区作业系统、推峰端咽喉区作业系统、驼峰调机作业系统等子系统分别研究。

In order to investigate combustion properties of the new propellant in rocket motor motor test was carried out under different burning surface to port area ratio and different burning surface to throat area ratio and corresponding p-t curves were obtained .

为研究这种新型高燃速推进剂在发动机内的燃烧特性，在不同燃通比和燃 喉 面积比的装药条件下，进行了发动机试验，获得了相应的压强-时间曲线。

Optimization of Washing Track Arrangement of Throat Area in Metro Depot

地铁车辆段 咽喉 区八字式洗车线布置的优化

Mass flow rate of added fuel injecting location and physical throat area on rocket ejector performance were investigated .

通过实验，获得了燃料的质量流率、燃料喷射位置和物理 喉 道 面积对推力的影响。

This paper analyzed the relationship between the vacuum degree and the throat area shrinking degree of mixer and the relationship between the maximum power and the vacuum degree and the throat area based on the engine mapping data .

作者在发动机台架试验数据的基础上，分析了混合器 喉 口 面积、收缩（入口）角度与真空度（ 进气 管 进气 压力）之间的关系；真空度、混合器喉口面积与发动机最大功率的关系。

Basic cold throat area

基本冷态 喉 道 截 面积

Then mathematical relationship between the flows of mixture and the throat area shrinking degree of mixer ( mathematical model ) can be established to meet the aim of the highest power of engine .

以满足发动机最大功率为设计目标，建立起混合气的流量与混合器的入口角度和 喉 口 面积之间的数学关系，即数学模型。