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回流区     
相关语句
  recirculation zone
     And the length of the recirculation zone is only about 1.3D, which is distinctly shorter than 2.5D for a pure swirl cup, in which D is the exit diameter of the swirl cup.
     真实结构的回流区长度明显缩短,其长度L与旋流杯出口直径D的比值(L/D)约为1.3,而纯头部结构的L/D约为2.5。
     The length of the recirculation zone is as short as about 1.3D,which is distinctly shorter than 2.5D for a pure swirl cup,in which D is the exit diameter of the swirl cup.
     真实结构的回流区长度明显缩短,其长度L与旋流杯出口直径D的比值(L/D)约为1.3,而纯头部结构的L/D约为2.5。
短句来源
     While the blade angle α =0°~60°,the velocity distribution is changed from uniformer to differentialer,and formed a recirculation zone.
     本文重点叙述了叶片角度从α=0°~60°变化时,气流平均速度分布从比较均匀,变成有较大的速度差,从而形成双峰式的速度分布,并形成一定的回流区
短句来源
     Application of Step Combustion Technology in Recirculation Zone in Huaibei Thermal Power Plant
     回流区分级着火燃烧技术在淮北电厂的应用
短句来源
     Study on the Length of Recirculation Zone inSuddenExpansion Combustion Chamber
     突扩燃烧室内回流区长度研究
短句来源
更多       
  recirculation region
     The Reynolds stress in the recirculation region is due to the turbulence structure,not the local mean velocity gradient.
     回流区的平均速度场分布与紊流度无关,回流的雷诺剪应力大小与当地平均速度无关,回流不是来自很远的下游。
短句来源
     Heat Balance Model in Recirculation Region of Flame-Stabled Boat
     火焰稳燃船回流区热平衡模型研究
短句来源
     Due to the porous capillary action of ceramicmaterial, the recirculation region behind a ceramic stabilizer is different from that behind a traditionalbluff any stabilizer.
     也由于陶瓷多孔毛细的作用,陶瓷稳定器后的回流区亦有别于传统钝体稳定器的回流区
短句来源
     The results show that the gap size has obvious effect on the wall pressure upstream of the plate flap when it is greater than the height of the flap; and changes the wall pressure at 0≤g/h≤2.0 downstream of the plate flap, which is the recirculation region.
     结果表明底部间隙在g/h≥1.0时对扰流片上游壁面压力分布曲线有较大影响,而对下游回流区压力分布曲线的影响主要在0≤g/h≤2.0的区域内;
短句来源
     The results showed that the maximum of the turbulent energy in the recirculation region existed hysteresis,and the buoyancy affected the time averaged variables but had little effect on the turbulent ones.
     计算结果分析发现回流区内湍动能最大值存在滞后的现象,浮力作用对时均量的影响较大,而对紊动量的影响则比较小.
短句来源
更多       
  backflow region
     In the paper,the experimental results of LYS 2P 10 liquefied petroleum gas flat flame burner are introduced,the diameter and thiokness of this burner studied,the maximum diameter and length of its backflow region discussed,and the distribution of negative pressue on center line of the backblow region experimented.
     介绍了 L YS2 P- 10液化石油气平焰烧嘴的试验结果 ,研究了此烧嘴的平展形流股的直径和厚度 ,讨论了回流区的最大直径和长度 ,试验研究了回流区中心线上的负压分布
短句来源
     The k ε turbulent model, the three gase mixing combustion model and the composite radiosity model are used to simulate numerically the central backflow region of the turbulent diffusion flame in a gas burner with the PHOENICS software.
     采用k ε湍流模型、三气体扩散燃烧模型和综合辐射模型 ,利用PHOENICS软件对瓦斯燃烧器湍流扩散火焰中心回流区进行了较详细的数值计算。
短句来源
     Abstract In order to improve combustion stability of low grade coal, the threedimensional velocity and turbulence distribution in the back flow region wasmeasured with a three dimensional LDA. Combustion tests were conducted in asingle nozzle test rig and actually applied in a 220t/h boiler firing low gradebituminous coal.
     为了提高劣质煤燃烧稳定性,利用三维LDA测量了稳燃腔燃烧器回流区三维速度分布及湍流度分布,在单火嘴试验台上进行了燃烧试验,并在220t/h燃用劣质无烟煤锅炉上投入实际应用。
短句来源
     To improve the ability of in depth peak load cycling of a 200 MW boiler,according to the synthetic analysis on the results of investigation ,the technology of direct firing of adjustable coal powder gradation and the technology of adjustable scope of back flow region developed by Zhejiang University are used to modify the burners for stable combustion at low load.
     为了提高200MW机组锅炉的深度调峰能力,根据调研结果进行综合分析,采用了浙江大学直流可调煤粉浓淡稳燃技术及回流区大小可调节技术对燃烧器进行了低负荷稳燃改造。
短句来源
     Experimental study has been carried out on a cold model of a gas burner Using the APV system, the flow fields of the burner model have been measured The results show that there are two typical back flow regions in the burner Correlations between the dimensions of the main back flow region and the structure of the flame stabilizer were further studied The obtained correlations provide empirical principle and instruction for the design and evaluation of this type of gas burners
     燃烧器流场内回流区的大小和形状决定了燃烧火焰的稳定性 ,利用APV激光测速系统 ,在燃烧器冷态测试实验装置上对一瓦斯燃烧器冷态模型的流动进行了研究 ,发现了该燃烧器流场内的双回流区结构 ,并得到了中心回流区尺寸与稳焰器结构的关系 ,为该结构类型燃烧器的稳焰设计及稳焰能力的评价提供了实验依据
短句来源
更多       
  backset current area
     Backset Current Area of Multi-channel Swirling Burner with Numerical Simulation in Three-dimensional Condition
     窑用多通道燃烧器回流区的三维数值模拟
短句来源

 

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  recirculation zone
It is noted that there are regimes in which the main recirculation zone is accompanied by an additional eddy formation with circulation in the opposite direction.
      
Data on the effect of the Mach number and inlet flow swirl on the extent and location of the recirculation zone are obtained.
      
Atomization of a Powder by a Swirling Flow with a Recirculation Zone
      
The technique of the use of multi-annular opposed jets as different from using swirl and bluff body creates an excellent recirculation zone with desired size in a large space.
      
Flame stabilization in attachment jet combustors is based on the existence of the high temperature recirculation zone, provided by the Coanda effect of an attachment jet.
      
更多          
  recirculation region
Incorporating the various effects, perpendicular injection shows the maximum mixing efficiency and its large upstream recirculation region has a good flame holding capability.
      
Based on the axial line velocity distribution, the flow after the disc can be divided into three regions, i.e., recirculation region, transitional region and self-similar region.
      
Planar laser-induced fluorescence (PLIF) imaging was performed to visualize the fin bow shock, separation shock, viscous shear layer and recirculation region of the flowfield at the junction of a blunt fin and a flat plate.
      
The results show that the outer secondary co-swirling jet significantly changes the structure of the inner under-expanded swirling jet, such as the shock structures and the recirculation region generated at the jet axis.
      
The results show that the recirculation region increases as the fuel injection pressure increases.
      
更多          
  backflow region
The experiment shows that after Transitory Detachment Reynolds shear stress is negative in the near-wall backflow region.
      
Finally, this method was successfully applied to confirm the existence of a small backflow region located in front of the large solitary waves, which were excited on the surface of a liquid film flowing down an inclined stationary plate.
      
A free molecule pressure probe2 is required to provide a better description of the flow pattern in the backflow region.
      
However, the absolute levels of the measured mass flux into the backflow region were very low, on the order of 7 x 10-7 g/cm2-sec or less.
      
However, the presence of a nonpumping surface in the backflow region appears to create a recirculatory flow field just ahead of it.
      
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