在简单的层流对流模拟中，大型的烟流从地核底部一路延伸到顶端。
The simplest convection model is that of a contained layer of liquid sitting above a point heat source.
高层建筑火灾时期，通道烟流的温度变化规律是消防工程设计的基础。
During a high rise building fire, the rule of change in smoke temperature is the basis of fire engineering design.
当煤矿井下发生爆炸时会产生一定体积、温度、浓度及密度的毒害烟流。
Poisonous and harmful smoke flow with a certain volume, temperature, concentration and density will be generated during explosion in a coal mine.
矿井火灾时期，火源巷道内高温烟流运动为三维非定常的流动及传热传质过程。
The movement of high temperature smoke in a fire road during mine fire was a three dimensional unsteady flow which is accompanied with heat and mass transfer.
如果晚些时候拍摄，到积雪覆盖整座火山之后，火山烟流将在白色背景下难以看到。
If the image had been taken later in the year, when snow covers the entire peninsula, the ash plume would be difficult to see against a white background.
据此，我们推荐了倾斜高斯烟流模式及其参数算法系统予测排气塔后部的浓度分布。
Further more, tilted model of Gaussian plume and parameter system have been recommended to predict concentration distribution behind wind tower.
将各种非稳态火源热释放速率计算式嵌入建筑物火灾烟流性状预测软件并进行了算例验证。
Some heat release rate formulas are added to the application software for calculation on the properties of the fire smoke flow in building.
由于毒害烟流与周围的环境存在着物质和能量的交换，便开始衰减，直至与周围的环境相同。
Smoke starts to weaken till to the same as the surroundings due to the exchange of substance and energy between it and surroundings.
几个小时后拍摄的照片式真色彩图像显示出了海岸边被冲入大洋的沉积物，以及仙台附近的黑色烟流。
The photo-like true-color image acquired a few hours later shows plumes of sediment washed into the ocean along the coast and a dark plume of smoke near Sendai.
同时，运用建筑物火灾烟气流动性状预测计算软件，分析了门窗开度及流量系数对火灾烟流的影响。
Using the prediction software of the fire smoke flow properties in the building, the effect of the flow coefficient on the fire smoke flow was also studied.
根据虚拟风机优选出实体风机，将实体风机带入烟流软件，得出了机械排烟条件下的烟流特性参数。
The Search to Properties of Fire Smoke Flow and Air Supplement and Mechanical Smoke Extraction Systems in Corridor of Building;
由高斯烟流模式可推算出汽车尾气污染物最大浓度值的出现距离，进而确定绿色道路廊道的基本宽度。
The main function of urban green road-side corridors are to reduce the automobile tail gas pollution and traffic noise.
实验结果表明：下行通风角联分支风流的逆转可以归结为烟流和风流异向分层流动的量变过程和风向突变的质变过程。
Results obtained show that reversal procedure of diagonal branch contains two stages, one is stratified flow of smoke and airflow toward different directions, which is a quantitative change stage.
（一些自然现象已经证实这一构想的正确，例如在火山喷发的时候，富含大量硫酸盐的烟流被送向平流层，从而暂时的改变全球气候）。
Nature has already shown that this concept can work, since volcanic eruptions that send sulphur-rich plumes into the stratosphere can temporarily alter the world’s climate.
通过对隧道火灾模型试验，研究隧道发生火灾时烟流性态，着重对隧道内的烟流扩散规律、烟流逆流层的长度、逆流速度、逆流层厚度进行了试验数据的分析。
This paper studies the character of smoke by fire model test in tunnel, emphasizes on the law of smoke distribution t analyses the length, velocity and thickness of refluxed zone.
应用因次分析法推导出表征巷（隧）道火灾烟流滚退距离变化规律的通用无因次表达式，该表达式包含影响滚退距离的火源热释放速率、通风风速、巷道倾角和形状等因素。
A non-dimensional expression, which shows the general variation of the backflow distance of smoke and hot gases during a roadway or tunnel fire, was derived through dimensional analysis.
二手烟包括“侧流烟”(烟草产品燃烧释放的烟)和“主流烟”(吸烟者呼出的烟)。
Secondhand smoke is the combination of "sidestream" smoke (the smoke given off by a burning tobacco product) and "mainstream" smoke (the smoke exhaled by a smoker).
对近期所研制的QN - 1型全流消光式烟度计有效光路的测定进行了较为详细的叙述。
Measure of the effective optical path of QN-1total flow extinction type smoke meter developed recently is described in detail.
在1992年由EPA发表的报告强调了健康的危险，尤其来自于侧流烟。
A report published in 1992 by the US Environmental Protection Agency(EPA) emphasized the health dangers , especially from side-stream smoke.
同时，还进行了水洞和烟风洞的模型流态观察。
The stream mode of the building models arc also observed in water tunnel and smoke tunnel tests.
本文采用烟显示和三维流场测量的方法，研究扩压叶栅角涡的物理模式。
The flow visualization by means of smoke and measurement of 3 -d flow field are conducted to investigate physical model of the streamwise corner vortexes in a compressor cascade.
本文采用烟显示和三维流场测量的方法，研究扩压叶栅角涡的物理模式。
The flow visualization by means of smoke and measurement of 3 -d flow field are conducted to investigate physical model of the streamwise corner vortexes in a compressor cascade.
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