迎风地

Not only is the method applied in this paper better to solve the iteration between unsteady convection and conduction and the boundary condition problem, but also is a developmental application on forward and backward difference of windward scheme under unsteady condition.

不仅较好地解决了对流换热和导热的迭代求解和边界条件的处理问题，还将迎风格式的向前和向后差分发展性地应用于非稳态求解过程。

The guidon flags flutter gayly in the wind.

骑兵的军旗在愉快地迎风飘动。

Then, the fronts .of different intensities are superposed on the orographic disturbances and pushed by basic geostrophic flow to climb over the orography.

通过非静力模式讨论了两维地形扰动与锋面的相互作用，研究了不同基本气流，包括正压、斜压、层结强弱差异，不同尺度的地形，包括不同高度和不同宽度，强弱不同的锋面等多种情况下地形扰动与锋面扰动的相互影响，发现地形尺度和气流的性质不同带来的结果是有差异的，中尺度地形使冷锋在迎风坡锋消，在背风坡则是锋生和锋消相间的波状分布，表现为锋面在山顶附近锋生、快速下坡过程中锋消和山脚处锋生的分布特征，这与半地转模式中地形的动力作用使冷锋在背风侧单纯加强是不同的。

Yet, oleander bloomed silently inside the gate. One bud withered, and another came out ;a tuft became yellow, and another blossomed out. You could not see the most prosperous period or the most withered time either in the vernal spring wind, or in the summer thunderstorm, or in the deep lonely autumn. It greeted wind and displayed her beauty every day, from spring to autumn, from the bloom of winter jasmine flower to the decay of the plantain lily and chrysanthemum.

然而，在一墙之隔的大门内，夹竹桃却在那里悄悄地一声不响，一朵花败了，又开出一朵，一嘟噜花黄了，又长出一嘟噜；在和煦的春风里，在盛夏的暴雨里，在深秋的清冷里，看不出什么特别茂盛的时候，也看不出什么特别衰败的时候，无日不迎风弄姿，从春天一直到秋天，从迎春花一直到玉簪花和菊花，无不奉陪。

Whereas,beside the entrance door the oleander quietly continue its circles,while one fall after another open,and one wither till another born.Enjoying in such a pleasantly spring breeze,the rainstorm in midsummer as well as the chilly in late autumn,from which I could not distinguish them from its special flourishing or declining times.From spring to autumn,from primroses to flower of fragrant plantain lily and chrysanthemum,all have their honors of keep it company until the end.

然而，在一墙之隔的大门内，夹竹桃却在那里悄悄地一声不响，一朵花败了，又开出一朵，一嘟噜花黄了，又长出一嘟噜；在和煦的春风里，在盛夏的暴雨里，在深秋的清冷里，看不出什么特别茂盛的时候，也看不出什么特别衰败的时候，无日不迎风弄姿，从春天一直到秋天，从迎春花一直到玉簪花和菊花，无不奉陪。

It standsthere in different weather between the Spring and the Autumn, consorting withthe Winter Jasmine Flowers to fragrant plantain lily and Chrysanthemum.

然 而，在一墙之隔的大门内，夹竹桃却在那里悄悄地一声不响，一朵花败了，又开出一朵，一嘟噜花黄了，又长出一嘟噜；在和煦的春风里，在盛夏的暴雨里，在深秋的清冷里，看不出什么特别茂盛的时候，也看不出什么特别衰败的时候，无日不迎风弄姿，从春天一直到秋天，从迎春花一直到玉簪花和菊花，无不奉陪。

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。

The resulting upwind-performance gets you further upwind and does it much faster than ever before.

收效的迎风表现得到您进一步迎风和快速地做它。

Many waves are there agitated by the wind, keeping nature fresh, the spray blowing in your face, reeds and rushes waving; ducks by the hundred, all uneasy in the surf, in the raw wind, just ready to rise, and now going off with a clatter and a whistling like riggers straight for Labrador, flying against the stiff gale with reefed wings, or else circling round first, with all their paddles briskly moving, just over the surf, to reconnoitre you before they leave these parts; gulls wheeling overhead, muskrats swimming for dear life, wet and cold, with no fire to warm them by that you know of; their labored homes rising here and there like haystacks; and countless mice and moles and winged titmice along the sunny windy shore; cranberries tossed on the waves and heaving up on the beach, their little red skiffs beating about among the alders;-- such healthy natural tumult as proves the last day is not yet at hand.

那儿风大，空气清新，激流拍岸，水花四溅直朝你脸上扑来，芦苇草和灯心草迎风翻舞。成群的鸭子在巨浪狂风中不安地游向岸边，正要上岸时，随着一阵嘎嘎的叫声，纷纷散去，直奔往Labrador，有的瑟缩着翅膀逆风飞行，有的先是浮在浪头打转，快速地扑打着双蹼，打量了一眼船上的人才离去；海鸥在空中盘旋，麝鼠也奋力游着，浑身湿冷，它们可不能和人一样用火取暖，到处是它们象草堆一样垄起的房子。晴朗多风的岸边，有数不清的老鼠，鼹鼠和山雀；酸果蔓在波浪中招摇，红色的小艇摇晃穿梭在桤木丛中-----这种生机勃勃的景象说明世界末日远未来临。

The results show that the wind loads on the roof structure are mainly suctions. and the wind loads on the windward and leeward of the roof structure near the ground are positive. The differences among the results of four turbulence models were not notable.

结果表明，此类大跨度椭球屋面风压分布主要以吸力为主，靠近地面的屋面迎风面和背风面风压为正压。4种湍流模型的模拟结果之间差异较小，数值方法能够较准确地模拟该类大跨度椭球屋面的风压分布。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。