喉道

The schlieren pictures were obtained at different injection pressure,sonic throat height and injector alignment.

采用纹影对天然气/空气流场进行光学显示，得到了不同喷射压力、喉道高度和喷嘴布置(单列6喷嘴和3列18喷嘴)条件下的流场纹影照片。

In addition, throat flow monitoring, especially gradient temperature determination, is useful if the sensors are stable.

此外，如果传感器是稳定的，喉道流量监示器，尤其是温度梯度的确定是非常有用的。

Each of cores were carried on NMR measurement after each of six or seven different centrifugal force, author can got that 200 psi was suitable to be best centrifugal force calibrating T_2 cutoff value for glutenite cores, and 400 psi was suitable for carbonatite and vulcanite cores in this ***, and corresponding lower limit of valid throat is 0.1μm for glutenite and 0.05μm for carbonatite and vulcanite.

对本文实验选取的岩心而言，低孔、低渗砂砾岩岩心T_2截止值标定时适合的最佳离心力均大致可取200psi，而碳酸岩和火山岩岩心最佳离心力均大致可取400psi，对应的有效渗流喉道半径下限砂砾岩为0.1μm，碳酸岩和火山岩为0.05μm。

Especially, it is found that there exists three types of relative permeability of water such as concave, convex to the water saturation ax and the reversed "S" pattern. The super-low permeability reservoir is sensitive to pressure, apparent with millipore undersaturation and water blocks. In this study, a new concept of irriducible undersaturation is brought up. And a new mode to describle the process of imbibition dynamics is used to reveal and confirm the mechanism of pinhole enveloping macropore as following: pendular ring of wetting phase gathers→it fills throat→it truncates nonwejting phase . The expression of pressure distribution and the equation of oil production are deduced under conditions of non-darcy linear seepage and non-linear seepage.

尤其发现水相相对渗透率曲线存在凹向、凸向含水饱和度轴及反S形三种形式；特低渗透储层的压力敏感性强，微孔隙的欠饱和及水锁效应显著，本文研究中提出欠束缚水饱和度的概念，引用一种描述渗吸动态即湿相液环聚集→充填喉道→截断非湿相的演化过程的新方法，更深刻地揭示和证明了&小孔包围大孔&机理；推导出了非达西线性渗流和非线性渗流条件下的压力分布表达式和油井产量方程。

The sand body of channel in the middle sublacustrine fan has good porosity and is favorable reservoir.

利用东濮凹陷桥口地区的地质、测井和化验分析资料，从沉积微相、成岩作用、岩石结构等多方面入手，对其储层物性特征和控制因素进行了研究，指出桥口深层气藏湖底扇中扇辫状水道砂体物性较好，为有利储集层；该储层孔隙类型以次生溶蚀粒间孔隙为主，岩石粒度较细、分选中—差、以点—线接触为主；片状或弯片状喉道所占份额较大，造成储层低孔低渗；受溶蚀和交代作用的影响，部分层位次生孔隙发育，深层中也存在物性较好的储层。

A model ejector with variable geometrical throat was designed, then, the processes of start and unstart were investigated, and a criterion was proposed for the condition that second throat is too small to start.

设计了几何结构可调的模型引射器，研究了引射器的启动和不启动过程，提出了判断第二喉道面积过小导致引射器无法启动的判据。

Finally, the pressure become very high immediately and a unstart phenomena appears.

当马赫数减小到一定数值时，在等直隔离段入口出现喉道截面，进一步减小来流马赫数，流量队塞，引起压力升高，波系向进口方向移动，波后出现亚声速流场，进气道不起动。

Also used successfully in throat applications with immersions

同时还成功用于喉道，水浸深度达到6英寸。

Throats are so easily blocked up for clay in rocks that the permeability decreases and the output is affected. The problem can be mostly worked out by inputting clay inhibitor into formations. Production well loggings, such as well logging of output profile, well logging of injection profile with five parameters, engineering well logging, were gained research in Hailaer oil field in this paper.

海拉尔油田是低渗透且具有断块性质的新开发油田，本文提出在对海拉尔油田开发进行地球物理监测时需要解决一系列关联的钻井地质工程问题，诸如岩石中富含粘土成分容易引起地层微粒堵塞喉道、孔道，从而导致渗透率下降现象，直接影响采油井产量。

The results indicate that,the CPR of venturis with reasonable design and suitable technics is obviously higher than critical pressure ratio.

实验结果表明：设计合理、工艺合适的Laval喷管，临界背压比明显高于临界压力比，而且，比热容比越小，表面粗糙度等级越高，喉道直径越大，对应的临界背压比越大。

This brought fixed cost, but it also is meant at the same time use a source to won't make you singlehanded assume a problem.

这带来了一定的成本，但它同时也意味着使用开源不会让你独力承担问题。

He gained a small fortune in real estate.

他在房地产上发了一笔小财。