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Rate Coefficients for Vibrational Energy Transfer in Rapid Expansions of Carbon Dioxide-Nitrogen Mixtures

机译：二氧化碳 - 氮气混合物快速膨胀中振动能量传递的速率系数

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An investigation of vibrational energy transfer processes in a rapid expansion containing N2, CO2, and Ar is presented along with related analyses. In the experiment, arc-heated Ar was mixed with N2 and CO2 and a rapid expansion was obtained by expanding the gas mixture in an underexpanded free jet. The stagnation temperature was varied from 1900K to 2900K and the stagnation pressure was held near 2.7 atm. Particular emphasis was placed on ensuring gas purity and the test gas was analyzed to obtain quantitative measurements of gas purity. The vibrational temperatures of N2 and CO2 (V3) were determined from spatially-resolved spectroscopic measurements. In addition, information was obtained about the CO2(V3 + 3V2) intramolecular and the CO2 V-T processes in the rapid expansion. The results show that the rate coefficients needed to match the theory to the data generally exceed those measured in shock-heating and laser-fluorescence experiments. The importance of these measurements with regard to prediction of CO2-N2 gasdynamic laser performance is also discussed. (Author)

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MacDonald, J. R.;
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年度 1970
页码 p.1-200
总页数 200
原文格式 PDF
正文语种 eng
中图分类
关键词
Carbon dioxide ; Gas lasers ; Relaxation time ; Electron transitions ; Mixtures ; Nitrogen ; Vibration ; Molecular energy levels ; Shock tubes ; Transition temperature ; Kinetic theory;

机译：二氧化碳;气体激光;弛豫时间;电子跃迁;混合物;氮;振动;分子能级;激波管;转变温度;动力学理论;

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8. Rapid Vibrational and Rotational Energy-Transfer Rates in Heated Carbon Dioxide Collisions by Double-Resonance Laser Spectroscopy [R] . Thomason, M. D. 1982

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Rate Coefficients for Vibrational Energy Transfer in Rapid Expansions of Carbon Dioxide-Nitrogen Mixtures

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