查询词典 static flow

On the basis of momentum conservation this paper focuses on the study of flow mechanism of the header and its flow static pressure distribution.

本文在动量守恒的基础上，研究汇流集箱的流动机理和集箱流体静压分析，锅炉汇流集箱流动的基本规律和设计参数。

Firstly numerical simulations of 2D turbulence flow over trains with wall and without wall are performed so as to investigate mesh, turbulence model, boundary conditions and relative parameters, at the same time, through the analysis characteristics of flow field and aerodynamic forces are acquired for the train under static condition.

首先进行列车有挡风墙和无挡风墙情况下的二维湍流绕流数值计算分析，研究模型网格、湍流模型、边界条件以及有关的参数设置和选取，并获得列车在二维绕流情况下静止时的流场特性与气动力。

Flow characteristic curve, flow-pressure characteristic curve of steering control unit and load-speed characteristic curve, null region of system are given through analyzing the static model.

在此基础上，对各元件和系统进行静态分析，得到转向器流量特性曲线，流量—压力等曲线以及转向系统的速度—负载曲线和死区范围等相关静态特性。

The additional calculation error of measuring gas flow capacity through planimeter calculating av - erage value between differential pressure and static pressure with dual bellows differential pressure flow capacity table is discugsed in this paper .

本文讨论了从双波纹管差压流量卡片上，用求积仪求得差压和静压的平均值计算天然气流量方法所产生的附加计算误差；分析了差压和静压在不同的变化趋势下，附加计算误差的大小和方向；提出了改进和预防的建议。

The trinomial deliverability equation can be determined based on the data of bottomhole flow pressure and gas production by using the rate multipleregression, and the open flow capacity and static formation pressure can also be derived.

为此，提出了一种精度高且计算简便的方法，不需要已知地层静压，只通过井底流压与产气量数据，利用多元线性回归方法，既可确定气井三项式产能方程，还可求得气井绝对无阻流量和地层静压。

Numerical simulations were done for a bistable latch valve of the system by FLUENT, and three groups of datum for different fluids were obtained with the same effective exit sectional area. Besides, a static mathematic model for the electromagnetic valve was established based on the obtained datum. Secondly, the motion of the valve spool was realized by UDF file in FLUENT. Three kinds of motions, uniform, acceleration and motion driven by the coupling effect of the liquid resistance and the electromagnetic force, were calculated and compared. The dynamic characteristic of the electromagnetic valve was obtained by analyzing the relationship of the mass flow rate of the inside flow field of the electromagnetic valve, the change of the drop pressure of the passageway of the valve, and motion time.

并针对系统中的某双稳态电磁阀，使用商用CFD软件FLUENT对其进行内部流场的数值模拟，通过使用不同流体介质，不改变阀门有效出口截面积的情况下，分析得到的三组数据，建立了该电磁阀的静态数学模型；通过编写UDF文件，实现对阀芯运动方程的控制，在阀门做由闭合到开启、开启到闭合运动时，控制阀芯分别做匀速运动、匀加速运动以及阀芯受到液体阻力与电磁力作用力的耦合力的运动，分析了三种工况下电磁阀内部流场质量流率和阀门出口入口压降的变化以及运动时间，从而得到该电磁阀的动态特性。

But the data analysis is relied on experience and statistics in a certain extent, so sometimes it makes big errors. Daniudi gas field is a low permeable gas field, the pressure buildup slowly. The measured formation static pressure is low and the flow pressure is high, so the calculated unresisted flow is high.

特别是大牛地气田属于低渗透气藏，压力恢复缓慢，所测的地层静压值偏低，求产开井3天以上多数井测取不到稳定的流压，所取流压值偏高，计算的无阻流量均偏高。

The total static loads and dynamic loads are summed as 4.692W and 38.4W, respectively. And comparison between the double-wall cooling method and the cooling tube method for the 77 heat shield has been discussed to provide the thermal parameters for flow process simulation. The critical thermal parameters of the main components of the QWR cooling system were determined for parallel arranged QWR cryostats. The mass flow and time for cool-down of the QWR to 4.2K was also estimated.

本文在详细描述恒温柜冷却系统的基础上，详细计算了4.2K冷质量与77K冷屏的辐射漏热，同时，还对恒温柜内部支撑系统计算了变物性下的导热漏热，得出了恒温柜系统的静态和动态热负荷分别为4.692W和38.4W，并分析比较了液氮冷屏采用夹层冷却方式与铜管缠绕冷却方式的优缺点，为流程模拟的参数确定提供了依据。

Then the algorithm was used to get the seven parameters of viscosity model of W-Ni-Fe heavy alloy and 316L stainless steel feedstock, which provide the necessary material data for quality forecast of mold core part made of stainless steel and heavy alloy tungsten ball, and for optimal design of mold and process parameters, which establishes the foundation of material database of MIM. In the research of visual simulation software development, in order to build the software system model and flow analysis algorithm based on Cross-WLF viscosity model, and realize functions such as pre-processor, solver, parameter regress, data management, graph operations, some advanced software methods as OOSE (Object Oriented Software Engineering) and UML were applied to set up user model, static model and dynamic model of MIM simulation software. These models describe system function, event flow, structure and relation of classes, object interaction, structure of database and I/O file format.

在MIM可视化仿真软件开发方面，为了建立软件系统模型及基于Cross-WLF粘度模型的流动分析算法，实现软件的前处理、求解器、参数拟合、数据管理和图形操作等功能，将面向对象软件工程与统一建模语言技术首次引入到MIM仿真软件的设计开发中，建立了软件的用户模型、静态模型和动态模型，描述了系统的功能需求、事件流程、类的结构与关系、对象之间的通信、数据库结构和输入输出文件格式等，用Visual C++与Delphi开发工具编码实现了2维MIM充模流动过程仿真软件，方便了对薄壁零件的质量预测以及模具和工艺参数的优化设计。

In the research of visual simulation software development, in order to build the software system model and flow analysis algorithm based on Cross-WLF viscosity model, and realize functions such as pre-processor, solver, parameter regress, data management, graph operations, some advanced software methods as OOSE (Object Oriented Software Engineering) and UML were applied to set up user model, static model and dynamic model of MIM simulation software. These models describe system function, event flow, structure and relation of classes, object interaction, structure of database and I/O file format.

在MIM喂料注射成形性能研究方面，针对毛细管流变仪测试法衡量流动性能的不足，提出使用螺旋线模具测试喂料熔体的注射成形性能，创造性地设计了一套可快换浇口，模腔封闭的螺旋测试模，并在螺旋测试模上采用正交实验设计，得出了高密度重合金喂料流动长度L_m的回归公式，揭示了L_m随Q_m、P_m、△T_m和凡的变化规律，并得出工艺参数对成形性能影响的强度顺序为Qm最大，尸m与△几其次，因而改善喂料流动性能应优先控制注射速率Qm。

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％。