压强

In this thesis, I summarize the theoretical calculation method, applied scope and notice of siphonic drainage system, and point out the advantage of siphonic drainage system compared with gravitation drainage system. In the archetype experiment study of siphonic drainage tube, I adopt different tube diameter and different structural height to survey the drainage volume and press in different place. I observe various kinds of flow state, and get chief factors which influence hydraulic peculiarity of system as the tube diameter or structural height, and find out the relevance of factor to flux. I apply CFD Fluent software and adopt standard k-ε model and RNG k-ε model, then use finite volume method and second-order upwind scheme to discrete numerical model, while coupling numeration of velocity field and press is based on SIMPLE. In the numerical simulation of curved part of tube, siphonic drainage tube experiment system and multi-outlet siphonic drainage system, I make research on internal velocity and press of system in different project condition by changing the tube diameter of curved part, negative press value in tube export and improving the quantity of water gutter. This thesis first adopts a method of combining archetype experiment and numerical simulation to study the siphonic drainage system, test and verify the validity of experiment and numerical simulation, and makefurther study on system, it solves the problems of limited testing conditions, and has a logical results, it can provide a valid method for optimizing and designing the drainage tube-net system. The conclusion have referring value for study and design of siphonic drainage system.

本文首先对虹吸式排水系统理论计算方法、适用范围以及注意事项做出总结，并分析了虹吸式排水系统的优势；再对虹吸式排水管道进行原型试验研究，采用不同管径不同立管高度，对系统流量、管道压强进行量测，观察了各种工况下的流态，对其水力特性进行研究分析，找出影响水力特性的落差、管径主要因素以及与排水量的关系；进一步应用计算流体力学Fluent软件，采用标准κ-ε模型与RNGκ-ε模型，计算过程应用有限体积法和二阶迎风格式对数值模型进行离散，速度和压力的耦合采用SIMPLE算法，分别对系统弯管段、虹吸排水管道试验系统、多斗虹吸式排水系统进行数值模拟分析，通过改变管段弯头处半径、管段出口负压值、增加雨水斗数对不同工况下系统内部的速度和压力进行研究；本文首次采用结合原型试验与数值模拟相结合的方法，对虹吸式屋面雨水排水系统进行研究，试验与模拟相互验证，并进行拓展，很好地解决了虹吸式屋面雨水排水系统由于试验条件限制问题，结果正确合理，为排水管网系统设计和优化研究提供了有效的方法，对工程设计有较好的参考价值。

As compared with the experiment,the computed surface pressure and skin friction lines are very goo...

湍流模型对壁面压强和壁面摩擦力线影响很小，对绝热壁面温度和热传导影响很大。

A What happens at thermal equilibrium when 1 kg of water at 0 °C is mixed with 1 kg of steam at 100 °C in standard atmospheric pressure Assume no heat is lost to the environment.

在标准大气压强下，1 kg在0 °C的水和1 kg在100 °C的水蒸气混合并到达热平衡后会怎样？（假设热没有散失到外界。

Based on the experimental data,the mathematical model and the equation for the relationship between the concentration of MgCl_2 solution and its boiling point and secondary steam temperature at any pressure were established.

根据实验测定的数据建立了数学模型，研究确定了任意压强条件下氯化镁溶液质量分数与其沸点及二次蒸汽温度的关系式，通过直接测定溶液沸点及二次蒸汽温度，即可确定出氯化镁溶液质量分数。

It's form is the contribution of the Reynolds stress tensor and magnetic fluctuating tensor.

主要的表现是：第一，Reynolds stress 张量和磁扰动张量的径向分量贡献给压强，引起太阳内部流体静力学平衡方程和太阳内部热力学变量的改变，从而导致温度、密度、内能、绝热指数以及绝热温度梯度等的变化。

Then,the influences of the argon pressure,substrate temperature,sputtering power,and the annealing temperature on the temperature coefficient of resistance for the sensor is studied.

结合工艺与测试实验，系统地分析了氩气压强、衬底温度、溅射功率、退火温度等工艺参数对电阻温度系数的影响规律。

Results indicate that fixed thermal capacity and elastic modulus are least affected by change of pressure, even to the extent to be noticed in case that pressure is low.

最近，文献[4]研究了德拜温度随温度的变化，但压强对德拜温度的影响未见报道。

By discussing the characteristics of the torpedo turbine engines energy supply system, the scheme of the fish torpedo engine sources supply is demonstrated, and the three-speed pressure valve is designed. The author builds the dynamic process simulation calculation plant for the thermal engine thrust system which is based on the fix quantity fuel pump and pressure control valve.

通过对鱼雷涡轮发动机能源供应系统特性的讨论，论文探讨了开环压强控制的物理机理，建立了被控系统的机理模型，进行了鱼雷涡轮发动机能源供应系统的方案论证及其关键部件——三速制压力调节阀的性能设计，构建了基于定量燃料泵——压力调节阀的鱼雷涡轮发动机系统动态仿真平台并进行了仿真计算。

The schemes of reinforcing batten plate s by tie bars are put forward and the effects of the space,diameter and types of tie bar on displacement and stress of batten plate s are analyzed.

分析了液态混凝土压强对钢管结构的作用，指出了哑铃形钢管拱先圆管后腹腔灌注顺序的合理性，提出了缀板采用对拉杆加固的方案，并分析了对拉杆间距、直径、材质等对缀板位移和应力的影响。

They generally can achieve pressures in the range of 10-3 - 10-8 Torr.

它们一般能达到10-3 - 10-8 托的压强。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。