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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。

Skewness of vapor flux is positive in stable and unstable BL.

水汽通量的偏斜度在稳定和不稳定条件下都是正的。

An ore of boron consisting of hydrated sodium borate; used as a flux or ''.

一种由含水硼酸钠组成的硼矿石,用作助熔剂或去污剂。

An ore of boron consisting of hydrated sodium borate; used as a flux or cleansing agent.

一种由含水硼酸钠组成的硼矿石,用作助熔剂或去污剂。

Borax or tincal: Sodium tetraborate decahydrate Na2B4O5(OH4 H2O, a soft, light, colourless crystalline mineral used as a component of glass and pottery glaze s in the ceramics industry, as a solvent for metal-oxide slags in metallurgy, as a flux in welding and soldering, and as a fertilizer additive, a soap supplement, a disinfectant, a mouthwash, and a water softener.

硼砂:四硼酸钠Na2B4O5(OH4?H2O。它是既软又轻的无色结晶物质,有多方面用途;作为玻璃的成分,在陶瓷工业中作为陶器的釉料,冶金中作为金属氧化物炉渣的溶剂,作为焊接剂,并作为化肥的加料、肥皂的添加物,消毒剂、漱口剂和水的软化剂。

The experimental conditions for measurement on the content of aluminium, calcium, magnesium, manganese, phosphor, silicon and titanium using ICP-AES method according to GB/T6730.63—2006 have been tested and analyzed. In the experiments the iron ore sample is decomposed and extracted using sodium carbonate/sodium tetraborate with proper acidity as the flux and then a working curve is drawn up using extremely pure ferric oxide (F2O3) as the primitive. And in the end the correlation coefficient r attains to 0.999 and above.

试验ICP-AES法测定铁矿石中铝、钙、镁、锰、磷、硅和钛国家标准方法GB/T6730.63-2006的实验条件,用碳酸钠/四硼酸钠作熔剂分解铁矿石样品,适当的酸度浸取,以高纯三氧化二铁打底作工作曲线,相关系数r达0.999以上。

Our factory's soft ferrite made from good-quality iron oxide has merits of high permeability, high saturation magnetic flux density and low loss, and id widely used in electric and electronic sets of various kinds.

利用本公司优质氧化铁生产的软磁铁氧体,具有高磁导率,高饱和磁通密度和低损耗的优点,它广泛的用于各类电子电器整机中。

Sales network across the country, and long-term export all kinds of solder, flux in the world.

销售网络遍布全国各地,并长期出口各种焊料、焊剂于世界各地。

The strong low-level warm and moist southwesterly flow provided moisture flux convergence such that heavy rainfall occurred consecutively over the same area for several days.

导致豪雨的另一条件为水气的供给,配合三波位涡增强的时段,雨区水气通量辐合亦呈现三波的增强趋势。

Spatter is one of the most important technologial property of stainless steel flux—cored wire.

飞溅是不锈钢药芯焊丝最重要的工艺性能指标之一。

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It is suggested that TDS can be used as a new method for the analysis of pedogenesis and climatic change.

总之,热处理过程中磁化率的变化能非常灵敏地反映磁性矿物的转化情况,而且,这种转化往往与样品所经历的土壤化作用强度密切相关,因此,TDS可做为分析成土作用强度和古气候变化的一种新方法。

Therefore, in this chapter, I will research into the conflict and contradiction of the paternity. Also, in this novel, the father's behavior of "He who loves well chastises well." is quite suspicious, one of the reasons is that the father thought his son belonged to him. And then, this thesis quoted Lacan's theory to touch upon that someone who has accepted the concept of patriarchal society, he will be influenced for his whole life. That also reveals that human being has no choice sometimes in this society.

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But these days, because of everybody's attention,"Super Marie " track begins suddenly to become eccentric, see a chess do not go out only action, be in it seems that sedulous and evasive what.

但这几天,因为大家的关注,"超级玛丽"的行踪突然开始变得古怪,只看棋不出招,似乎在刻意回避着什么。