气流

The results show that wind divergence that is corresponding to the rain area forms at the windward side. After horizontal flow gets over the windward side, vertical circulation flow of climbing-ascending-descending form above the mountaintop. The ice crystal locates in the upper level, and below it there is snow and graupel, the cloud water and rain water is in the low level of the cloud.

此次暴雨过程的动力场、云和降水微物理过程的主要特征是：水平气流在迎风坡附近形成风场辐合，雨区与辐合区位置基本一致，垂直方向上出现明显的气流爬升—上升—下沉的中尺度环流。

Numerical tests are also conducted to investigate the microphysical effects to the mesocale convective systems. The evaporation of raindrops can strengthen the surface "cold pool" to decease the temperature of rainfall center. The condensation of vapor can lower the air pressure and increase the convergence and updraft so that the convective echo develops stronger. The melting of graupel can cool the air to restrain the convective activity. The falling of precipitation particles can increase the downdraft and induce the outflow nearly the surface. The effect of condensation is the most important among all the microphysical processes. It can change the whole structure of cloud system.

微物理过程对对流系统发展和维持有重要作用：强降水的雨滴蒸发过程会加强"冷池"效应，同时增强了雨带南侧原有的地面中尺度辐合线；凝结潜热在低层诱发了与回波相应尺度的中尺度低压，增强了辐合和上升运动，促进对流发展；霰的融化吸热通过冷却大气会不利于气压下降、气流辐合抬升等过程，降低对流不稳定能量，减缓对流发展；重力拖曳使气块冷却降温，降低对流不稳定能量，并且使低层的气压升高、气流辐散，在近地面附近产生出流，加强地面中尺度辐合线的强度。

The filaments, still in the liquid form, fall by gravity through the spinning cell, and a verticle tube through which a current of air or inert gas passes at a temperature as high as 400℃.

依然处于液状的长丝，靠自重通过纺丝仓，然后经过一个竖直的管道，在管道中流过温度达400℃的空气流或惰性气体气流。

The filament s, still in the liquid form, fall by gravity through the spinning cell, and a verticle tube through which a current of air or inert gas passes at a temperature as high as 400℃.

依然处于液状的长丝，靠自重通过纺丝仓，然后经过一个竖直的管道，在管道中流过温度达400℃的空气流或惰性气体气流。

The filaments, still in the liquid form, fall by gravity through the spinning cell, and a verticle tube through which a current of air or inert gas passes at a temperature as high as 400 c.

依然处于液状的长丝，靠自重通过纺丝仓，然后经过一个竖直的管道，在管道中流过温度达400℃的空气流或惰性气体气流。

Second, as to how to avoid the 'gu' of the tone head and tone ending, we should shot the 'gu' of the tone head, through many abecedarian use 'hu' to play tone head so that we can catch on that, the breath head is soft and weak, and the 'gu' is come out.

首先解决音头的"咕"声，大多初学者均用"呼"来吹奏音头，我们可以体会一下，一口气"呼"出来，气头是软的，气流很弱，发出的音便是"咕"声，尔后随着气流力度的增加，发音才正常。

The test airflow distribution was made by using hot-wire anemometer and the establishment of experimental equipment of bag filter, and numerical simulation of CFD was made.

摘 要：采用热线风速仪及建立袋式除尘器实验装置对袋式除尘器内部流场气流分布进行测试，应用CFD对其气流分布进行数值模拟与实验对比。

An analytical model was built up on the jet deflection in the crossflow by applying the theorem of momentum, which takes full account of mixing between the upstream fluid and burner jet, and of the total pressure difference between the two sides of the jets. Through analysis of this model, experimental study and numerical simulation, effects of the nozzle spacing ratio, width of the furnace corner, width of the nozzle and imaginary circle diameter on the aerodynamic field in the furnace were obtained.

本文综合考虑了炉内旋转气流与燃烧器射流的混合和燃烧器射流向火侧与背火侧的全压差等因素，应用动量定理建立了横向气流中射流偏转的分析模型，并结合冷态模化试验和数值模拟计算，得到了燃烧器间隙率、炉膛切角、喷口宽度和假想切圆直径等因素对炉内空气动力场影响的规律。

The influences of the shape of intake port and offset of valve on the characteristics of flow field and swirl ratio were analyzed.

计算表明：螺旋气道斜坡段产生的气流角动量是气流在气缸内形成旋流的主要原因。

The air purifier 10 may be constructed without inclusion of the ionizer needle 34 or may include more than one ionizer needle within the airflow path to charge particles that proceed along the airflow path.

空气清洁器10可以被构造为不包括电离子针34或在气流通路内包括多于一个的电离子针，以便向沿气流通路前进的微粒提供电荷。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。