کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5430854 | 1397424 | 2007 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Direct determination of gas velocity and gas temperature in an atmospheric-pressure argon-hydrogen plasma jet Direct determination of gas velocity and gas temperature in an atmospheric-pressure argon-hydrogen plasma jet](/preview/png/5430854.png)
Direct gas temperature and gas velocity measurements made in the exit plane of a subsonic argon-hydrogen thermal plasma jet from high-resolution lineshape analysis of laser light scattered by the plasma are reported. The lineshapes are in general a superposition of the ion feature of the Thomson-scattered light and the lineshape of Rayleigh scattered light. In the center of the jet Thomson scattering dominates while at larger radii Rayleigh scattering dominates. Because of the complexity of the lineshapes of light scattered by multicomponent plasmas, only those that are predominantly due to Thomson scattering can in practice be analyzed for gas temperature. Gas velocity can be determined from the Doppler shift of the lineshapes relative to the frequency of the incident laser if the velocity is greater than about 50 m sâ1. The maximum gas temperature measured was 14,500 K±5%. The maximum gas velocity measured was 1100 m sâ1±3%. Temperature values and the radial velocity profile are compared with those previously obtained from a subsonic all-argon plasma jet operated under similar conditions.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 107, Issue 2, September 2007, Pages 217-225