primary nozzle meaning in English
一次风口
一次喷嘴
主喷管
Examples
- The results have an important reference value for selecting primary nozzle types of exhaust ejector systems
试验结果对排气引射系统主喷管选型设计有重要的参考价值。 - But the real performance can be obtained is mainly determined by the ejected secondary mass flow rate , the mixing degree , the mixing efficiency , and the secondary combustion efficiency can be obtained . 2 ) the ejected secondary mass flow rate , the mixing degree and the mixing efficiency are synthetically affected by the configuration of rbcc engine , especially the mixer and the primary nozzle , in which the primary nozzle , including shape , number and distribution mainly determines the mixing degree ; while the mixer configuration primarily determines the mixing efficiency
而实际能达到的性能则取决于实际的引射比及两种流体的实际掺混程度、掺混效率和二次燃烧效率； 2 )引射发动机的构型，包括后体及一次流喷管的形状、数量、配置等，对引射进来的二次流量、一次流和二次流之间的掺混程度和掺混效率起着主要作用。 - These measures are as follows : shorten the primary wind intervals to improve thermal load of the burner ; reduce the size of hypothetical circle of contact to prevent the flame from splashing ; use nozzles with larger height / width ratio to increase the effusive rigidity , so as to increase the jet flow depth of secondary wind into the main jet flow ; use a higher primary wind velocity to increase its jet flow rigidity ; use a special flame holder structure of the primary nozzle , so as to improve
这些技术措施主要有:缩小一次风间距以提高燃烧器区域热负荷;缩小假想切圆防止火焰刷墙;采用高宽比较大的二次风喷口以增加射流刚性,提高二次风射流进入主射流的深度;采用较高的一次风速来提高一次风射流刚性;一次风喷口采用特殊稳燃结构;提高下二次风的托粉能力。 - Abstract : optimum distances between primary nozzle exit and mixing tube inlet , static pressure recovery of the mixing flow in mixing tube 、 total pressure distributions at the exit of mixing tube 、 pumping coefficients and total pressure losses of the exhaust ejector systems with four different types of primary nozzles have been measured in the experiments
文摘:对4种主喷管组成的排气引射系统的引射系数和总压损失、各主喷管出口与混合管进口之间的最佳间距、混合气流在混合管内的静压恢复及混合气流在混合管出口处的总压分布等进行了测量和对比。