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建筑物尾流
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  building wake
     ANALYSIS AND MONTE CARLO SIMULATION OF EFFECTS OF EMISSION HEIGHT ON POLLUTANT DISPERSION IN BUILDING WAKE
     排放高度对建筑物尾流扩散影响的分析与蒙特卡罗模拟
短句来源
  “建筑物尾流”译为未确定词的双语例句
     Numerical simulation of flow fleld and dispersion in wake region of building
     建筑物尾流区气流与污染物扩散的数值计算
短句来源
     Wind Loads to Tall Buidings Due to Wakes from Differentially Featured Constructions
     不同体型建筑物尾流作用下的高层建筑的风荷载特性
短句来源
  相似匹配句对
     Numerical simulation of flow fleld and dispersion in wake region of building
     建筑物尾流区气流与污染物扩散的数值计算
短句来源
     Wind Loads to Tall Buidings Due to Wakes from Differentially Featured Constructions
     不同体型建筑物尾流作用下的高层建筑的风荷载特性
短句来源
     Elementary Introduction of Intelligent Building
     浅谈智能建筑物
短句来源
     Ascismic strengthening of buildings
     建筑物的抗震加固
短句来源
     OPTICAL SPECIALTY OF REAL WAKES
     真实尾流的光学特性
短句来源
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  building wake
The episodes occurred in situations where the buoyant plume rise should have been sufficient to eliminate any excessive ground level concentrations resulting from building wake effects.
      
It is found that the flow in the first three regions is relatively homogeneous, but that spatial variances in the latter three regions are large, especially in the building wake and canyon regions.
      
When one or more buildings in the vicinity of a point source interrupt wind flow, an area of turbulence known as a building wake is created.
      
The On Line Atmospheric Dispersion Model (OLADMO) is a quasi boundary layer parameterised Gaussian plume model with additional algorithms to account for plume rise, building wake effects and deposition processes.
      
Approximately 2.5 times the height of the building is a good estimate of the total depth of a building wake.
      
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A numerical model containing a 3 dimensional fine mesh non hydrostatic submode and a random walk submodel was developed and used for simulation of turbulence and dispersion in wake area of building. Based on measured flow field and concentration field behind the exhaust tower of one city in NJU meteorological wind tunnel, experiments were performed using the model. The results obtained from numerical modeling were in accordanc with those observed in the wind tunnel.

采用了细网格非静力能量闭合边界层模式和随机游动模拟方法建立了一套分析建筑物尾流流场和污染物扩散的数值模拟系统.作为应用研究的例子,在对某城市地下交通隧道排废气的风井塔尾流区流场和浓度场进行风洞流体物理实验的基础上,利用所建的模拟系统对风井塔尾流区气流和污染物扩散特征进行研究.结果表明,所建的模拟系统的模拟结果与风洞试验的结果吻合较好,对一些小尺度带有明显湍流不均匀性的流场和局地空气污染物散布的情况有较好的模拟效果和良好的应用前景.

The paper describes the dispersion characteristi cs in building wake in detail and emphasizes on the analysis of effects of emissio n height on wake dispersion. The emission of sources at various heights above a cubic building is simulated through establishing Monte Carlo simulation method ( also called particle random walk simulation). According to the simulated results . The effect of emission height on the dispersion characteristics in building wa ke is studied and the relevant issues existed in the present...

The paper describes the dispersion characteristi cs in building wake in detail and emphasizes on the analysis of effects of emissio n height on wake dispersion. The emission of sources at various heights above a cubic building is simulated through establishing Monte Carlo simulation method ( also called particle random walk simulation). According to the simulated results . The effect of emission height on the dispersion characteristics in building wa ke is studied and the relevant issues existed in the present prediction models i s also discussed. (

介绍了建筑物尾流扩散的特征 ,分析了排放高度对尾流扩散的影响 ,通过建立蒙特卡罗方法 ,模拟了位于立方体形建筑物上方的烟囱在不同释放高度的排放 ,探讨了排放高度对建筑物尾流扩散特征的影响 ,并就现有预测模式所存在的问题进行了讨论。

Based on the high frequency force balance technique, systematical studies of the along wind dynamic interference effects on two and three tall buildings with different sizes were carried out. The interference characteristics and mechanism were analyzed by using artificial neural networks, statistics and spectrum analysis method. The results show that the increased turbulence intensity in the wakes of the upstream buildings has a tendency to increase the adverse effects on the downwind building, especially when...

Based on the high frequency force balance technique, systematical studies of the along wind dynamic interference effects on two and three tall buildings with different sizes were carried out. The interference characteristics and mechanism were analyzed by using artificial neural networks, statistics and spectrum analysis method. The results show that the increased turbulence intensity in the wakes of the upstream buildings has a tendency to increase the adverse effects on the downwind building, especially when the latter was situated near the wake boundary. Two upwind buildings can produce more adverse effects on the downwind building than a single building does. The tested maximum interference factor (IF) of two interfering buildings in exposure category B has an increasing of 79%over that of one building. Shedding vortices from the upstream interfering buildings, especially for a smaller breadth one, can lead to a vortex induced resonance and cause enhanced wind loads on the downstream building at lower wind speed. Generally, due to the fact that the higher turbulence flow disturbing the organized vortices and reducing the strength of the shedding vortices, the IF measured in the exposure category D are much smaller than those in exposure category B. However, the maximum IF is still found up to 2.2 in exposure category D.

基于高频底座力天平技术,研究了不同宽度比的两个和三个建筑物间的顺风向动力干扰效应。文中采用了神经网络、统计和谱分析等方法对干扰特性和机理进行了分析。结果显示,当受扰建筑位于上游施扰建筑物的尾流边界时,会产生较大的动力响应;并且两个施扰建筑物的联合干扰作用会比单个施扰建筑物的干扰作用强,在B类地貌下两个施扰建筑物测出的干扰因子(IF)会比单个施扰建筑的增加79%。位于上游的施扰建筑所脱落的旋涡会使受扰建筑产生涡激共振响应并且产生数倍于非共振情况的IF值,尤其对于小宽度的施扰建筑,在较小的折算风速时就会产生涡激共振问题。粗糙化地貌的高湍流度会对上游施扰建筑尾流的旋涡形成产生一定的抑制作用,在D类地貌下的IF值要远小于B类地貌情况,但在D类地貌下观察到IF值仍有2.2。

 
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