气流

This slot was aligned to send its airflow at an acute angle, roughly inline with the general flow over the wing.

根据设计，气流会以指定的角度流向尾翼下表面，差不多与通过尾翼的大部分气流平行。

Voltage type, it uses a closed rotor, can be widely used in smoke delivery type, delivery type air pressure and vacuum conveying system conveying equipment, it can guarantee the flow pipeline pressure, not leaking, safe delivery and collection node materials, and for this reason called the million air lock, and it can not only pressure, while both common features.

耐压型，它采用封闭型转子，可以广泛用在吸送式，压送式气流输送系统和负压输送设备上，它可以保证输送管内的气流压力，不泄漏，能够安全的输送和收结物料，所以在这方面称为万锁气器，它不但可以耐压，同时兼备普通型功能。

Results show that during the snowstorm disaster, under the large scale background with "trough in south and ridge in north", strong cold air caused by prevailing northerly wind in northern Asia wedged into low level atmosphere over Southeast China and formed a "clod cushion". At the same time, warm-wet air was also transported to Southeast China by southerly wind. The vertical shear of winds from cold to warm airflows produced strong upward motion and then, the warm-wet air over the cold air wedge was driven to rise. Finally, the structure of "warm cover" and "cold cushion", as well as corresponding vertical circulation over the converging frontal zone came into being.

研究结果表明，灾害发生期间，中国北方中低层大气盛行偏北气流，使较强的偏北冷空气"楔入"中国东南部低层大气，构成低层"冷垫"，同时偏南暖湿气流源源不断地将大量水汽输送到中国东南部，冷暖气流交汇及其垂直切变导致强烈的上升运动，构成了"冷垫"上空的"暖盖"及"南槽北脊"反位相环流汇合锋区的垂直环流结构。

If the resistance rises to the pre-set number(1245－1470Pa), the controller will send out signals, first to control the lift valve to do these operations: close the hole of the valve board to cut air current and stop filtering, and then to open the electromagnetic pulse valve to blow compressed air whose pressure is 0.5-0.7Mpa into filter bag with a short time(0.01－0.12s).

当含尘烟气由进风口进入灰斗以后，一部分较粗尘料在这时由于惯性碰撞、自然沉降等原因落入灰斗，大部分尘粒随气流上升进入袋室，经滤袋过滤后，尘粒被阻留在滤袋外侧，净化的烟气由滤袋内部进入箱体，再由阀板孔、出风口排入大气，达到收尘的目的，随着过滤过程的不断进行，滤袋外侧的积尘也逐渐增多，从而使除尘器的运行阻力也逐渐增高，当阻力增到预先设定值（1245－1470Pa）时，清灰控制器发生信号，首先控制提升阀将阀板孔关闭，以切断过滤烟气流，停止过滤过程，然后电磁脉冲阀打开，以极短时间（0.01－0.12s）向箱体内喷入压力为0.5－0.7Mpa的压缩空气，压缩空气在箱体内迅速膨胀，涌入滤袋内部，使滤袋产生变形、震动，加上逆气流的作用，滤袋外部的粉尘便清除下来掉到灰斗，清灰完毕之后，提升阀再次打开，除尘器又进入过滤状态。

There are two layers of adjustable shifting vanes in the double layered shutter inlet port The short one is used to adjust the angle of flare of the blowing airflow and to shift the direction of the airflow while adjusting the long one can make the blowing airflow affix the ceiling joist or descend at an angle.

双层百叶风口有两层可调节角度的活动叶片，短叶片用于调节送风气流的扩散角，也可用于改变气流的方向；而调节长叶片可以使送风气流贴附顶棚或下倾一定的角度。

In addition, a deep research is made on airflowdistribution in the entrance of the equipment, and Fluent software is used to simulate theairflow distribution before and after the airflow distribution board in the gas-in box.

本文还专门对除尘设备进气口处烟气的气流分布进行了深入研究，应用Fluent数值模拟软件对除尘设备进气口放置气流分布板前后气流的分布状况进行了数值模拟。

The southwest vortex restricted the development of the plateau vortex in some way at the early stage when it appeared in the lower atmosphere. When they were coupled longitudinally, the vertical difference caused by the different vorticity advections between the upper and lower levels excitated the updrafts under 500 hPa and strengthened cyclone vorticity, and then the positive vorticity at 500 hPa and 700 hPa increased by two times The change rate of positive vorticity facilitated the plateau vortex to move eastward.

分析表明：高原涡与西南涡涡心之间的纬向距离在5个纬度的时候，两者上升气流都在500 hPa以下，当两者继续东移，在经向上耦合的时候，二者同时得到发展，西南涡中心的上升气流达到300 hPa，而高原涡中心的上升气流突破200 hPa；西南涡在低层出现初期，在一定程度上制约了高原涡的发展，随着两者在经向方向发生耦合，上下涡度平流不同造成垂直差动，将激发500 hPa以下的上升运动与气旋性涡度加强，使得500 hPa与700 hPa涡心正涡度值的增大近 1倍。

Evidence suggests that 1 under more stable stratification, the basic flow, if moving faster at low and high levels (particularly in the presence of jets there), allows a resulting meso-β unsteady wave to propagate eastward with respect to basic flow and even at greater velocity compared with it; 2 vertical windspeed shear of basic flow causes instabilities of the TWT perturbation; 3 considering the second derivative of basic-flow wind with respect to z (denoted by zz≠ 0 which is simply given as β* hereafter) the expression for the phase velocity of vortex Rossby wave is obtained, which is unidirectional in propagation with respect to basic flow; 4 VRoW has its physical origin from β*, i.e., from z-varying heterogeneities of y-direction averaged vorticity of the basic flow field; 5 VRoW phase velocity is associated with zonal wave number k, its energy is dispersive and the group velocity exists in the x direction; 6 when windspeed meets the condition of β*, TWT disturbance instability may be that of mixed VRoW and gravity wave; 7 if basic flow is subject to linear shear but does not meet the condition of β*, the TWT instability is that of inertia-gravity wave.

在大气层结比较稳定的情况下，如果基本气流在低层和高层较大(有可能存在低空急流和高空急流)，此时产生的β中尺度不稳定扰动相对于基流向东传播，甚至于快速向东传播。基本气流在垂直方向上的风速切变对于中尺度横波型的扰动起着不稳定的作用。如果考虑基流的二次切变，可以得到涡旋Rossby波的相速度表达式，涡旋Rossby波相对于基本气流是单向传播的。涡旋Rossby波产生的物理根源是基本流场的风速二次切变，亦即基本流场y方向的平均涡度在空间z方向上的不均匀所致。涡旋Rossby波的相速度与纬向波数也有关，它的能量是频散的，其在纬向x方向也存在群速度。在基本流场的风速存在二次切变时，横波型不稳定可能是混合的涡旋Rossby重力波的不稳定；而在基本流场的风速仅仅存在线性切变，不存在二次切变时，横波型扰动的不稳定则是重力惯性波的不稳定。

Optimized BP network model for predicting igniting temperature of pulverized-coal based on genetic algorithm;2. A review and elementary discussion of powder and pulverized-coal charge;3. Paper discussed flame ignition stabilization analysis of N125MW direct current burner in pulverized-coal boilers of solid state discharge.

以N125MW直流燃烧器固态排渣煤粉炉燃烧着火稳定性为研究对象，根据煤粉气流着火方式以及对影响煤粉气流着火因素的分析，提出提高煤粉气流着火稳定性以及低负荷燃烧不投油的控制措施，从而保证了煤粉的稳定着火，以保证锅炉安全稳定运行。

With the increase of the downwash flow velocity, the exhaust temperature has a peak value the exhausting duet temperature decreases with the increase of the downwash flow velocity.

结果表明，模型出口排气温度随着主喷管流量增加而线性增加，引射系数随着下洗气流速度增加而减小，出口排气温度随下洗气流增加时有一个峰值，增加下洗气流速度有助于降低外套壁温。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。