Experimental investigation on argon cluster sizes for conical nozzles with different opening angles
Experimental investigation on argon cluster sizes for conical nozzles with different opening angles
复制标题
DOI：
10.1063/1.3475514
复制
发表时间：
2010-09-15
影响因子：
3.2
通讯作者：
Kim, Dong Eon
中科院分区：
文献类型：
--
作者：
Chen, Guanglong;Kim, Byunghoon;Kim, Dong Eon
利用瑞利散射测量方法，实验研究了锥形喷嘴张开角度对高压气体(高达50bar)在真空中膨胀产生的Ar团簇平均尺寸的影响。散射信号强度和散射图像由光电倍增管和电荷耦合器件摄像机同步记录。这些测量允许比较不同开口角的圆锥形喷嘴之间的平均团簇尺寸。实验结果表明，正如Hagena标度定律所预期的那样，Ar团簇的大小与开口角有关。但也发现：(1)对于开口角较小的喷嘴，在高背压下，团簇尺寸与Hagena标度定律的偏差较大；(2)锥形喷管开口角越小，团簇尺寸对压力的依赖性越弱。(C)2010年美国物理研究所。[DOI：10.1063/1.3475514]
Using Rayleigh scattering measurement, we experimentally studied the effect of the opening angle of conical nozzles on the average sizes of argon clusters produced by high-pressure argon gas (up to 50 bars) expanding into vacuum. Both the scattering signal intensity and the scattering image were synchronically recorded by a photomultiplier tube and a charge-coupled device camera. These measurements allow for the comparison of average cluster sizes among conical nozzles of different opening angles. The experimental results indicate that, as expected by Hagena's scaling law, the argon cluster size is dependent on the opening angle. However, it is also found that (1) the cluster size exhibits a larger deviation from Hagena's scaling law at high backing pressure for a nozzle of a smaller opening angle and (2) the smaller the opening angle of conical nozzle gets, the weaker the pressure dependence of cluster size becomes. (C) 2010 American Institute of Physics. [doi:10.1063/1.3475514]