The phenomenon of hot air recirculation is a universal question in designing and operating of direct air-cooled power units. 热风回流现象是直接空冷机组的一个普遍性问题。
Ultrafine pulverized-coal contained in the tertiary air was used as the reburning fuel and the oxygen level of the tertiary air was reduced with the use of flue gas recirculation ( FGR). 该再燃系统利用三次风中的超细煤粉作为再燃燃料,并通过烟气再循环来降低三次风中的氧浓度。
To clean air immediately a drive uses Recirculation filter. 要立即清洁空气过滤器的驱动器使用再循环。
The pump is environmentally friendly and includes air cooling, internal oil recirculation, integral oil mist separator for oil free exhaust air, low vibration and low noise level. 此款泵的工艺也很合乎环境要求,包括空气冷却,内部用油循环,为排气所设置的整体的油气分离系统,低震动,低噪音设计等。
Analsing disseminate effect influenced by air recirculation and radiator surface dirt and control quotes which designed unit given are analysed. 分析了空气回流和散热器表面脏污对散热效果的影响,并对设计单位提出的控制指标进行了论述。
Air Quantity Calculation of the Controlled Recirculation Ventilation in Metal Mines 金属矿山受控循环通风风量计算
In order to decrease the energy consumption and the cost of drying process, the outlet air recirculation has been proposed and the way simulating the process has been discussed. 为了降低干燥过程中的能耗与费用,提高干燥的经济效益,对采用干燥器出口空气再循环的流化床谷物干燥的经济效益进行了分析研究。
The tests show that, the tertiary air ratio has more influence on the boiler combustion, while the preferable opening degree of mill recirculation air damper may improve the economics and safety of boiler. 试验表明三次风率的大小对锅炉燃烧的影响较大,较佳的磨煤机再循环风门开度可以提高锅炉的经济性和安全性。
Experiments and Research on Dust-Extraction Unit by Air Recirculation 气流循环除尘装置试验的研究
Simple Numerical Simulation of Air Bubbles Motion in Self Priming Centrifugal Pumps With Outer Recirculation 气泡在外混式自吸泵内运动的简单数值模拟
Influences of First Stage Air Ratio and Gas Recirculation Ratio on the Generation of NO_x During Combustion by Oil Boiler 一次风率及循环废气率变化对燃油锅炉运行中氮氧化物生成的影响
It is discovered through experiments that there is bad effect in the movement when it opens wide the air throttle recirculation thus controls circulates the gate to open again below 30%; 试验发现运行中开大再循环风门的不良影响从而控制再循环门开度在30%以下;
According to air temperature, the experiment could be divided into three phases: the average air temperature of the first low temperature phase was 10~-6 ℃, the recirculation was operated by 79days; 本次回灌试验根据气温分为三个不同阶段,即低温阶段,平均气温为10~-6℃,回灌时间计79天;
Under the conditions of high air/ fuel ratio ( higher than 13) proper EGR ( Exhaust Gas Recirculation) can reduce HC emissions dramatically, which suggests a good method to improve the emissions level under idling speed in modern gasoline engines. 在空燃比较高(大于13)的情况下,采用适当的废气再循环可显著降低排气中HC的生成量,这为改善现代汽油机怠速工况下的排放水平提供了有效的途径。
The uniformity of fuel air mixture distribution in the primary zone of the new design is fairly good, while the fuel air mixture in the recirculation zone is rich. 该方案的特点是采用了三旋流器以及双油路复合式喷嘴,设计的主燃区油气分布相当均匀,而回流区内的油气分布是局部富油的。
A calculation model of air bubbles motion in self priming centrifugal pumps with outer recirculation is presented in this paper. 本文提出一种气泡在外混式自吸泵内运动的计算模型。
An Experimental Investigation on Secondary Air Flow Mixing in the Recirculation Zone of a Bluff Body 钝体回流区二次风掺混实验研究
And gives a temperature distribution simulation diagram of the impacts of hot air recirculation and transverse air on the cooling effects. 对于热风再循环和横向风对冷却效果的影响给出了温度分布模拟图。
The presence of primary hole air flows remarkably squeezes the recirculation zone, resulting in a elliptic-like cross section, with the long axis is longer than the short one up to1.6 times. 发现真实结构燃烧室内的回流区不再是轴对称,主燃孔和二次气流的存在使回流区明显被压扁(最扁处的长轴约为短轴的1.6倍);
When the angle of inner secondary air is 60 °, it could form a recirculation region that radial size and axial length of recirculation region is relatively large, and particle distribution relatively uniform. It helps to improve combustion efficiency and stability and suppress NOx formation. 内二次风叶片角度为60°时能形成径向、轴向尺寸较大的回流区,颗粒分布相对均匀,提高燃烧效率、稳定性的同时,有利于抑制NOx的生成。
As the inner secondary air swirling intensity increases, the recirculation zone size increases; But as the outer secondary air swirling intensity increases, the width of recirculation zone increases and the length decreases. The swirling intensity increases after the installation of the expanding tuyere. 内二次风旋流强度增大,回流区尺寸增大,外二次风旋流强度增大,回流区宽度增大而长度减小,加装扩口后燃烧器旋流强度增大,并随着扩口角度增加,扩展角增大。
Outer heat transfer is estimated for the flameless combustion of the methane and air under different recirculation ratio. 评价了甲烷和空气完全燃烧时在不同再循环率条件下工作在无焰燃烧模式的最大外部取热。
With higher primary air rate, particles are more concentrated. The average size of particle is larger in primary air control areas, the relatively density of particle is smaller and the particle volume flow is larger in the recirculation region. 较大的一次风率下,一次风作用区域颗粒更加集中,颗粒平均粒径较大,回流区颗粒相对数密度较小,颗粒体积流量较大。
The blade angle of outer secondary air is too large or too small will cause the relative concentration of particles near the axis region and is lack of coal powder concentration in the recirculation region. 过大或过小的叶片角度使得轴线附近区域颗粒相对集中,回流区内煤粉浓度不足,不利于稳燃和抑制NOx生成。