迎风的

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。

All their cavalry, with upraised swords, standards and trumpets flung to the breeze, formed in columns by divisions, descended, by a simultaneous movement and like one man, with the precision of a brazen battering-ram which is effecting a breach, the hill of La Belle Alliance, plunged into the terrible depths in which so many men had already fallen, disappeared there in the smoke, then emerging from that shadow, reappeared on the other side of the valley, still compact and in close ranks, mounting at a full trot, through a storm of grape-shot which burst upon them, the terrible muddy slope of the table-land of Mont-Saint-Jean.

那整队骑兵，长刀高举，旌旗和喇叭声迎风飘荡，每个师成一纵队，行动一致，有如一人，准确得象那种无坚不摧的铜羊头①，从佳盟坡上直冲下去，深入尸骸枕藉的险地，消失在烟雾中，继又越过烟雾，出现在山谷的彼端，始终密集，相互靠拢，前后紧接，穿过那乌云一般向他们扑来的开花弹，冲向圣约翰山高地边沿上峻急泥泞的斜坡。

Gloria Resort Sanya boasts the biggest oceanfront lawn and various romantic venues, such as the Bay View Terrace, Pool Bar and Beach Bar, where the brides and the grooms can stand under the starry sky, facing the South China Sea and appreciating a spectacular fireworks extravaganza, with a glass of wine in hand.

三亚凯莱度假酒店拥有亚龙湾内最大的临海草坪，以及多个浪漫的独立空间，包括泳池畔的湾景台，草坪旁的迎风听海，海滩上的沙滩吧等。

The rich, sweet smell of the hayricks rose to his chamber window; the hundred perfumes of the little flower-garden beneath scented the air around; the deep-green meadows shone in the morning dew that glistened on every leaf as it trembled in the gentle air: and the birds sang as if every sparkling drop were a fountain of inspiration to them.

草垛发出的醇厚、芳香的气息从他房间的窗户渗透进来，窗下一个小花坛，像似&百味香炉&蒸熏着周围的空气。墨绿的草坪，随着微风轻舞，在朝露中熠熠发光。鸟儿从晶莹的晨露中获得了灵感，迎风欢歌。

The towering ridge of a sand dune in the Arabian Desert points to the afternoon sun.

这处阿曼新月形砂脊的沙丘是因强烈的信风形成的，迎风面形成平缓的斜坡，而在背风侧形成凹形的滑面。

Velocity speeding\|up on the windward flanks of barchans is a dynamic factor which control dune formation and dune shape.

迎风坡气流加速是决定新月形沙丘发育和形态的动力因子，研究这一加速过程的定量关系有利于认识沙丘的发育、沙丘的形态、沙丘的运动等。

Benefits of this system were obvious over a conventional twin layout, with only the same frontal area as a single-engined aircraft, the wing left clean of engine nacelles and attendant structures, and no asymmetric pull if one engine cut out.

这样的系统的好处明显超过了传统的双螺旋桨布局形式，他就如同一架具有有相同迎风面积的单引擎飞机。不在机翼下安置发动机舱和辅助结构，就不会因为一台发动机的熄火而产生不对称的推力。

The distributions of dimensionless temperature and net wall heat flux are calculated and compared to the results in references. By comparison, it is shown that the upwinding finite element methods developed have good accuracy in solution of radiative heat transfer in semitransparent media.

采用2个算例对提出的方法进行验证，与文献中得到的无量纲温度及净辐射热流分布较，结果表明提出的迎风有限元方法对于求解多维半透明介比质内的辐射传递有着很好的精度。

Experimental results also showed that the size and shape of the stick cross-section made a prominent effect on the strength and shape of flow wake.

对比实验的结果表明不同结构型式的减阻杆后绕流尾涡区的流动分布不同，其中减阻杆的迎风宽度及形状对减阻杆后绕流尾涡区的流动分布有明显影响。

Although the Olympic Mountains are a rain trap for the moist Pacific winds that annually dump 140 inches (366 centimeters) of percipitation on the range's winward slopes, they also cast a "rain shadow" over the northeast side of the peninsula.

尽管奥林匹克山脉是一个雨水集中区，来自太平洋湿润的风每年在山脉的迎风坡倾泻下140英寸（366厘米）的雨量，但也在这个半岛的东北部留下一个&雨影区&(译者注：山坡背风面降雨极少的地方)。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。