throat diameter

In this paper, according to one-dimension flowing theory of ideal gas, calculation formulas of critical backing, pressure and diffuser throat diameter of oil vapour pump are introduced, and then some methods of improving critical backing pressure are discussed.

本文根据流体力学理想气体一维流动的理论，导出了油蒸汽流泵的临界前级压力和扩压器喉部直径的计算公式，并且讨论了提高临界前级压力的措施。

Measurement of Throat Diameter of Small Venturi Tube The Architecture of Venturi and Gehry

文丘里除尘器喉管结构的优化设计小型文杜里管喉部直径的测定

Regarding the nozzle, the variation of nozzle outlet diameter and throat diameter is similar. The injection coefficient increases along with the structure size to reduce. The work current capacity increases. The influence of ejector performance to the absorption chamber is just opposite.

对于喷嘴部分，喷嘴出口直径和喉部直径的变化规律相似，随着结构尺寸的增大引射系数降低，工作流量增大，同吸收室对喷射器性能的影响恰恰相反。

According to the characteristics of the fracture, vug and pore on the capillary curve, the fracture porosity, vug porosity, pore porosity, the wide of fracture, throat diameter of vug and pore can be calculated.

根据裂缝、孔洞和孔隙的毛管压力曲线特征，可分别计算裂缝孔隙度、孔洞孔隙度和岩石孔隙度，以及裂缝宽度、连通孔洞的孔喉直径和连通孔隙的孔喉直径。

Experimental study for such was carried out on established test rig with flat, converging and converging diverging nozzles of different throat diameter, shape and diverging angle.

为使流经缩放形喷管的低温热水得到充分膨胀和加速，在此对缩放形喷管的喉部及扩张段进行实验对比分析。

The results indicated that the pitch number, throat diameter, flow rate and temperature has great effect on the resistance of throttle set;

研究结果表明：节数、喉部直径和流量、温度等参数对节流件阻力特性的影响较大。

Finally the design principle is proposed for throat diameter of channel of variable section.

同时给出了变截面混合腔喉部直径的设计原则。

Measurement of Throat Diameter of Small Venturi Tube

小型文杜里管喉部直径的测定

The throat diameter is 35 mm.

氧枪喷头喉口直径（d喉）选取35mm。

A numerical simulation using the k-ε model was done to study the effect of the burner's throat diameter, throat opening ratio and outer shell length on the gas reflow characteristics.

运用k-ε模型，对喷管燃烧器喉部直径、喉部开孔率及外罩壳长度等结构参数对燃烧器回流特性的影响进行了数值模拟。

The influence of fuel grain length and port diameter, oxidizer mass flux and nozzle throat diameter on the combustion efficiency and propulsion performance was then analyzed in further tests to optimize these parameters.

利用试验数据分析了燃料药柱几何尺寸、氧化剂质量速度和发动机喷嘴喉径对燃烧效率及推进性能的影响，探讨了这种发动机的优化设计范围。

The nozzle throat diameter was 35 mm, and the inlet stagnation temperature and pressure were 800 K and 274 4 kPa, respectively.

主喷管喉道直径为35mm，进口总温和总压分别为800K及274.4kPa。

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；

Relationships between the rock electrical conduction efficiency and the cave size, fracture width, and throat diameter are presented.

推导了岩石导电效率与岩石中孔洞大小、裂缝宽度以及导电效率与孔洞大小、喉道直径之间的关系式。

An empirical equation for hydraulic resistance was obtained after the effects of pitch number of throttles, throat diameter, temperature, pressure, flow rate and outside heat source on the hydraulic resistance of throttle set were examined.

通过研究节数、喉部直径以及温度、压力、流量和外部热源等参数对节流件阻力特性的影响，获得了计算节流件阻力的经验关系式。

It is found that the average throat diameter and throat median increase, the throat selectivity turns bad, the main flowing pore throat enlarges, and the quit efficiency decreases.

结果发现，喉道平均直径和喉道中值增大，喉道分选性变差，流动主孔喉增大，退出效率降低。

Calculation and analysis for two different geometric structure scrubbers are made to express the relationship among pressure drop, throat diameter, gas velocity and liquid volume flow rate.

对两种不同的设计方案进行了计算分析，反映压降与喉管、气速和洗涤液量的关系。

The results show that: the absorption rate increases with the throat diameter of diffuser and the diameter of the suction chamber.

实验结果表明，采用喉部直径较小的缩放喷嘴、喉部直径较大的扩压器及直径较大的吸入室时吸收率升高。

Results show that when the ( inlet) pressure and the slot position keep unchanged, the suction amount of Venturi Injector increases with the ( decrease) of throat diameter and length, and the increase of slot diameter;

研究结果表明：在进口压力和凹槽位置一定的情况下，减小喉管直径和收缩段长度以及增加凹槽直径均能使文丘里施肥器的吸肥量增加；

Based on sandstone pore throat model to study inherent regularities among sandstone throat pore diameter ratio, throat pore volume ratio and throat pore coordination number.

根据砂岩孔喉模型，研究砂岩孔喉直径、孔喉体积比、孔喉配位数之间内在的规律。

It is concluded that pore throat diameter, pore structure, granularity, porosity, permeability and height of gas column are the influential factors of irreducible water saturation of this area. Granularity is main influential factor.

通过对实验资料的分析，研究了莺歌海盆地束缚水饱和度的影响因素，认为孔喉直径、孔隙结构、粒度、孔隙度和渗透率以及气柱高度是该地区束缚水饱和度的影响因素；

Field data prove that the percolation parameters have good relations with pore diameter and throat diameter, and high correlativity with productivity of hydrocarbon reservoir ( the correlation coefficient is 0.9343).

实际资料证实，该渗流特性参数不但与储集层的孔隙直径和喉道直径关系密切，而且与油气层产能具有较高的相关性（相关系数为0.9343）。

The ratio of throat diameter and pipe diameter 0.4-0.6.

喉口直径和管道直径之比0.4-0.6。

Grade. Calculation of Critical Backing Pressure and Diffuser Throat Diameter of Oil Vapour Pump

油蒸汽流泵的临界前级压力及扩压器喉部直径的计算