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secondary nozzle     
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  二次喷管
     Unstructured mesh was used in 3-D numerical simulation to simulate the influence of secondary nozzle on performance of rocket ejector, ejecting ability and mixing condition.
     应用非结构网格技术对引射火箭的流动进行了三维湍流数值模拟,分析了二次喷管对引射火箭总体性能、引射能力和混合状况的影响。
短句来源
     The conclusion that the optimal secondary nozzle exit area generating the maximum thrust agrees well with the numerical simulation, indicating that the exit area of secondary nozzle should be optimized according to structure and flow parameters during design.
     表明在引射火箭设计时,应结合引射火箭的结构和流动参数对二次喷管出口面积进行优化设计,以达到最佳推力性能。
短句来源
     There exists an optimal exit area of secondary nozzle to result in a maximum thrust of rocket ejector in the light of the investigated ejector chamber structure.
     在文中所研究的引射燃烧室结构条件下,存在一个最佳二次喷管出口面积,它能使引射火箭的推力达到最大。
短句来源
     There exists an optimal exit area of secondary nozzle to get maximum thrust of rocket ejector.
     存在一个最优的二次喷管出口面积,使发动机推力最大。
短句来源
     The influence of primary flow and secondary nozzle geometry on ejector effect and thrust was investigated, and the approach to increase thrust of rocket ejector was found gradually.
     研究了一次流参数和二次喷管结构对引射效能和发动机推力的影响,找到了逐步提高推力的措施。
短句来源
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  二级喷嘴
     REASONS FOR OVERBURNING OF SECONDARY NOZZLE OF GAS COMBUSTION TURBINE
     燃气轮机二级喷嘴烧损原因探讨
短句来源
  二次喷嘴
     This paper mainly studies the influences of the ratio of solid to gas and the position of gas nozzle in the injector (without secondary nozzle) on the stability of pneumatic conveying at a terminal pressure of 0.6 MPa.
     考察了在背压为 0 .6 MPa(PFBC中试电站流化床压力 )下 ,固气比和喷射器 (无二次喷嘴 )气体喷嘴位置对输送稳定性的影响
短句来源
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  secondary nozzle
When the gas is expanded in the secondary nozzle to static temperature values corresponding to the conditions of free flight, an exact simulation of the latter is possible at an altitude H= 65 to 70 km (u= 7.5 km/s, M = 20 to 25).
      
The air-liquid mixture shall then be discharged into the secondary nozzle and, hence horizontally into the basin.
      
In addition, primary and secondary jet velocity and turbulence components were measured at the centre of primary and secondary nozzle exits.
      


The influence of the design parameters, the structure of the nozzle array as well as the mode of H2 addition on the output power are discussed. A specific power of 130J/g has been obtained with a mixing distance of 1.75mm between the primary and secondary nozzles.

文章针对燃烧驱动连续波氟化氢激光器分析了其喷管出口后的混合过程;同时也讨论了喷管设计参数、结构和加氢方式等对激光器输出功率、比功率的影响。实验表明在主喷管和副喷管之间混合距离为1.75mm时,用这种喷管的氟化氢激光器,比功率可达到 130J/g。

Pneumatic transport technology is a key technology in PFBC experimental power-station,which is related to whether the fuel can be sent into the pressured fluidized bed continuously and steadily,and ensures the fuel to combust normally and steadily in the pressured fluidized bed.This paper mainly studies the influences of the ratio of solid to gas and the position of gas nozzle in the injector (without secondary nozzle) on the stability of pneumatic conveying at a terminal pressure of 0.6 MPa.

在增压流化床燃烧 (PFBC)中试电站 ,气力输送技术是关键性技术 ,它关系到以燃料是否能连续稳定送入增压流化床内 ,保证增压流化床正常稳定燃烧。考察了在背压为 0 .6 MPa(PFBC中试电站流化床压力 )下 ,固气比和喷射器 (无二次喷嘴 )气体喷嘴位置对输送稳定性的影响

The secondary mass flowrate of the HYLTE nozzle in DF/HF chemical lasers was numerically and theoretically calculated, the mass flowrate coefficients of D2,H2 and He with 0.01~0.4MPa stagnation pressure and 0.1~0.9mm height of the half throat are obtained. The changerules of mass flowrate coefficient with stagnation pressure and half throat's height were got, the functions deduced from these rules were of satisfactory preciseion. As a result, some suggestions are presented on the design and maintenance...

The secondary mass flowrate of the HYLTE nozzle in DF/HF chemical lasers was numerically and theoretically calculated, the mass flowrate coefficients of D2,H2 and He with 0.01~0.4MPa stagnation pressure and 0.1~0.9mm height of the half throat are obtained. The changerules of mass flowrate coefficient with stagnation pressure and half throat's height were got, the functions deduced from these rules were of satisfactory preciseion. As a result, some suggestions are presented on the design and maintenance of secondary nozzle.

 对DF/HF化学激光器HYLTE喷管的副喷管质量流量进行了数值和理论计算,得出入口滞止压力在0.01~0.4MPa之间、喉道半高度在0.1~0.9mm之间的喷管的氘气,氢气和氦气质量流量系数,总结出质量流量系数随入口滞止压力和喉道高度的变化规律,并给出拟合公式,为副喷管的设计提供依据。

 
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