Exhaust emission of vehicle engines is one of the primary air pollution sources.
车用内燃机的废气排放是大气污染的主要污染源之一。
The test results show that it is feasible to shorten the length of guide plate in a primary air pipe duct.
结果表明，缩短一次风管道内导流板的长度是可行的。
The problem that the primary air leakage of trisector AH is large arises some domestic customers attention.
三分仓空气预热器一次风泄漏量偏大，引起国内部分用户的反响。
Pulverized coal concentration in primary air stream has an important effect on ignition and combustion stability.
煤粉浓度对煤粉气流着火及燃烧稳定性的影响较大。
When the primary air blast wave from the explosion strikes the ground another blast wave is produced by reflection.
当爆炸引起的入射冲击波触及地面时，由于波的反射便产生另一冲击波。
The mixing point of primary air and secondary air of burner is a key parameter for the flame stabilization of fuel.
燃烧器一、二次风混合位置是燃烧着火稳燃的关键。
When the primary air blast wave from the explosion strikes the ground, another blast wave is produced by reflection.
当爆炸引起的入射冲击波触及地面时，由于波的反射便产生另一冲击波。
The curve of relationship between flame speeds and the primary air ratio is got, and when primary air ratio is about 0.
得出了二甲醚火焰传播速度与一次空气系数的关系曲线，并且在一次空气系数约为0。
The concentration distribution of pulverized coal in primary air pipe is very important for advancing efficiency of boiler.
掌握煤粉锅炉一次风管中煤粉浓度的分布情况，对提高锅炉效率有很重要的意义。
Common processes of primary air fan-coil system are given in this paper. The disadvantage of winter process is pointed out.
本文给出风机盘管加新风系统冬夏季常用处理过程，指出冬季处理过程确定困难的缺点。
In this paper the selection and optimum of operation of the pressure type cold primary air fan in large boiler were analyzed.
分析了大型锅炉正压冷一次风机选型及运行优化要点，指出煤种和空预器漏风率是影响一次风机选型的主要因素。
In experiment, steady operating point of combustion can be obtained mainly by setting primary air factor and the size of spout.
在实验中，主要通过调整一次空气系数和引射器喷口的大小，达到稳定燃烧的运行工况。
As a high velocity air jet, it supports and straightens the primary air stream and thus prevents slagging on the furnace walls.
作为一股高速射流，它对一次风气流起支撑作用，以防止炉壁结渣现象的发生。
The mixture of coal powder and primary air belongs to typical gas-solid two-phase flow, whose parameter is difficult to detect.
煤粉与一次风的混合物属于典型的气固两相流，其相关参数的检测难度很大。
The primary air velocity is the highest at the nozzle ring, and this is an important factor to affect the discharge of pyrites.
喷嘴环处的风速最高且是影响石子煤排放的一个重要因素；
The effects of the plate spacing, approach velocity and the primary air temperature on evaporative cooler was predicted theoretically.
通过计算表明，换热器通道间距、空气的迎面风速，以及一次风的干球温度的变化对换热器效率有很大的影响；
The distributions of gas temperature, O2, CO2, CO, and NO concentrations were measured under different swirl numbers for the primary air.
测量了在不同的一次风旋流数下，气体的时均温度、O2、CO2、CO和NO浓度的分布。
The reasonable calculation parameters for air-conditioning room are determined with examples, and the energy consumption for the primary air fan-…
结合实例确定出合理的空调室内计算参数，并对风机盘管加新风系统从湿工况改造为干工况进行了能耗分析。
It is shown that both the ignition and the combustion efficiency can be significantly improved and the ratio of primary air can be greatly increased.
试验结果表明，钝体可显著改善劣质煤着火情况和大幅度提高燃烧效率，并可允许大幅度提高一次风率。
By using this method, winter process of primary air fan-coil system is more convenient to be determined and the performance of fan coil is more stable.
该方法能方便确定风机盘管加新风系统冬季处理过程，并且冬夏季风机盘管运行更稳定合理。
The creditable measurement of pulverized coal concentration in primary air is the basis of combustion optimization and safe operation of utility boilers.
一次风煤粉浓度的可靠测量是电站锅炉燃烧优化和安全经济运行的前提条件。
Firstly, it briefly analyses the influence of primary air velocity for the combustion safety in boiler and makes the requirement analysis for the system.
本文首先简要的分析了一次风速的大小对锅炉燃烧安全性的影响并对系统做了需求分析；
In comparison with the conventional tangentially fired system, the horizontal bias burner and the twin circles of the primary air are two main improvements.
与传统的切圆燃烧系统相比，水平浓淡燃烧器和同层一次风双向切圆布置是该系统的主要改进之处。
Meanwhile analysis was made on how primary air, concentration of pulverized coal, mill outlet temperature and pulverized coal fineness affected ion ignition.
为此分析了点火过程中一次风速、煤粉浓度、磨煤机出口温度和煤粉细度等对等离子点火的影响。
Using recirculation flow to heat the primary air and increasing the concentration of pulverized coal in primary air really do good to boiler flame stability.
利用回流烟气加热一次风煤粉气流和提高一次风气流的煤粉浓度，都有利于锅炉燃烧的稳定。 开缝钝体燃烧器的设计综合考虑了回流加热和煤粉浓度局部富集。
Secondly, it researches and summarizes the theory of primary air velocity measurement and establishes the theoretical basis as well as the design of the frame.
其次，对一次风速测量原理进行了研究和总结，确立了风速计算的理论基础，进行了总体结构框架的设计；
Stable coal transportation and kiln thermal condition is achieved by increasing primary air rate, improving inventory and modifying screw clearance of the screw pump.
通过采取提高一次风风量、控制合理库存、改造螺旋间隙等措施，达到了稳定煤粉输送量的目的，稳定了窑内热工制度。
In this paper, a new supporting equipment of primary air pipein cooler is introduced , and the design principle, main features and application situation are discussed.
介绍一种新型的冷却机主风管的支撑装置，针对设计原则、主要特点和使用情况进行了讨论。
Selection of the primary and secondary airflow rate, the guide Angle of the blade, the primary air ratio as well as the material for manufacture of the burner nozzle are given.
然后介绍了一、二次风速，旋流叶片的导角，一次空气比例系数等参数的选择及制造烧嘴的材料。
Based on the experimental result and flame stability theory, the possibility to obtain the optimum parameters of the burners are discussed under different primary air coefficient.
在实验结果的基础上利用火焰稳定理论，论证了在不同一次空气系数时获得最佳燃烧器参数的可能性。
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