首页 | 本学科首页   官方微博 | 高级检索  
     


Study of vibrational deactivation of molecules of carbon dioxide gas during cooling of stream in a supersonic nozzle
Authors:N. V. Evtyukhin  S. A. Losev  V. N. Makarov  V. A. Pavlov  M. S. Yalovik
Abstract:The vibrational temperature of the antisymmetrical type of vibrations (v3) of the CO2 molecule at the exit of a supersonic nozzle is measured in the present work using the method of recording the infrared emission. Freezing in of thev3-type vibrations was observed during the flow of undiluted carbon dioxide in a nozzle. In this case the vibrational temperature T3 considerably exceeded the translational temperature. On the basis of a comparison of the experimental results with calculation it can be concluded that vibrational deactivation of CO2 molecules occurs three to five times faster than the excitation of the vibrations during heating in a shock wave. All the experiments were conducted under the following conditions: maximum expansion of gas in nozzle A/A* = 115, temperature range 1900–2400 °K, pressure range 1–17.5 atm.Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoi Fiziki, No. 6, pp. 32–40, November–December, 1973.The authors are grateful to U. G. Pirumov and É. A. Ashratov for the calculation of the nozzle profile and the distribution of streamlines as well as for a discussion of the results.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号