管道中的

During the calculation the results got by quintic spline kernel was the best so it was chosen as the proper kernel for the SPH simulation. By comparison of the simulation results got by SPH and finite volume method, it was proved that the buffer cells method proposed in the SPH simulation to implement the Dirichlet boundary conditions was accurate, and this is of great importance for the simulation of flows pass a pipe. At last, the SPH method was improved to simulate the liquid-solid two phase flows and the results show that this method was appropriate for the simulation of flows containing viscous fluid and macroscopic solid components. Now the two methods are both able to predict the continuum flows and rarefied flows severally, but the hybrid program still has some aspects to be improved.

首先用标准算例验证了SPH方法的理论模型和计算程序的准确性；通过比较确定选用五次样条核作为计算低雷诺数下的粘性连续流动时的核函数；采用SPH方法和有限体积法分别对同一管道流动进行了对比计算，证明了本文提出的边界缓冲区方法在实现SPH方法中的流体边界条件时的有效性，解决了SPH方法模拟管道流动时的一个关键问题；巧妙地使用SPH方法对化工分离流动中常见的固液两相流及固液耦合作用进行了模拟尝试，获得了较好的结果；在跨尺度计算方面，目前两个子程序已经能够分别模拟连续的和稀薄的二维管流问题，二者的耦合计算程序还处于调试和优化阶段，各个参数对于计算精度和计算速度的影响规律仍在探索中。

The preliminary optimization is carried on for which the ogee shape factors of the duct are selected to be optimized, and the RCS and flow loss coefficient are considered as objectives.

在进气道腔体的优化中，分析了内管道外形多目标优化中的层次性，将大系统理论中多层次优化方法引入进气道内管道设计中，选择S弯曲线的形状参数为优化的参数，以进气道腔体的RCS、流动损失系数为目标函数，进行了初步的优化计算。

This paper proposes one set of leakage point location system based on the correlation analysis, through the virtual instrument technology. We choose the water sound signals as the studying object when the pipelines leak out, carry out the orientation task via the Fast Fourier Transform.

本文采用虚拟仪器技术，设计了一套基于相关分析算法的管道漏点定位系统，即选择管道泄漏时产生的、在管道中传播的声发射信号为研究对象，通过基于快速傅立叶变换(FFT，Fast Fourier Transformation)算法的相关分析来实现漏点的检测与定位。

The aspect of non-linearity caused by deformation of the pipeline may not be considered in the swallow sea if rigidity of the pipeline is high enough, linear beam model is established for the pipeline and solved by using finite element method.

在浅水铺管时，如果管道刚度较大，可以不考虑管道的变形引起的非线性因素的影响，近似地把浅水中的管道模型视为线性梁，用线性有限单元法求解。

This paper makes systematic analysis on the geneses and harmfulness of pipe scale in urban water pipeline ,and advances some measures for preventing the scale in urban water pipeline .

系统地分析了城市输水管道中管垢的成因和危害，并提出了城市输水管道中管垢的防治措施。

Exhaust valve is an essential auxiliary piping system components, widely used in boilers, air conditioning, oil and gas, water supply and drainage canal.

排气阀是管道系统中必不可少的辅助元件，广泛应用于锅炉、空调、石油天然气、给排水管道中。

Establish large deformation model of pipeline span, simulate and validate these formulas; give ideas on the set of frusta; put forward several suggestions on correlative criterions.

基于大挠度梁理论，考虑几何非线性和土壤的物理非线性建立了跨越管道的大变形分析模型；通过5种典型工况下跨越管道变形的计算机仿真分析验证了公式适用性，对跨越管道固定墩的设置问题给出了建议；提出了一些关于现行规范中跨越管强度验算的修正建议。

Leather cap type pig has higher abrasion during pigging gas steel pipeline. Furthermore, various elbow bend and tee joint need different suitable length pig or else easy to cause pipeline clog.

在燃气钢质管道清管过程中，皮碗式清管器受到的磨损较大，而且管道中各类弯头和三通件要求清管器的长度合适，否则容易造成卡堵。

According to the criterion for design of thermal power plant steam/water piping, this new model and method had considered on a good many actual details in design, such as the disposal of actual pipeline at the scene, the local resistance coefficient of pipeline accessories, the actual parameter and physical properties of the drainage of heaters and so on.

新的设计模型与方法在设计过程中参照火力发电厂汽水管道设计技术规定，充分考虑了现场实际管道的布置、管道附件的局部阻力系数以及各级加热器疏水的实际物性参数等诸多设计细节。

In another aspect, the security of pipeline can be judged from the rupture safety factor of pipe material.

在有缺陷穿越管道的静强度分析中时，从判断管道材料的断裂安全系数方面入手，来判断管道的安全性。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。