论文标题
振动放松和触发CO $ _2 $的气体排放的非平衡振动分解
Vibrational relaxation and triggering of the non-equilibrium vibrational decomposition of CO$_2$ in gas discharges
论文作者
论文摘要
在低平移旋转温度下，CO $ _2 $的非平衡振动解离$ t $在微波诱导的等离子体的条件下计算。总结了CO $ _2 $ shock Tube和声学实验中振动松弛的半分析治疗。对模拟的状态到状态振动动力学模型进行了基准测试，并调整为气体动态实验中获得的松弛时间。引入了管理参数$ q/n^2_0 $，其中$ Q $是等离子体中的特定体积功率，而$ n_0 $是CO $ _2 $的初始数字密度。建模结果表明，当$ q/n^2_0 $超过一定的临界值时，主要解离过程CO $ _2 $ + m $ \至$ co + o + m的速率迅速提高。提出了一个简单的分析计算（q/n^2_0 \右）_ {crit} $，这与数值结果非常吻合。在$ t $ = 300 K时，估计的$ \ left（q/n^2_0 \ right）_ {crit} \ eqsim 6 \ cdot10^{ - 40} $ 〜w $ \ cdot $ m $ m $^3 $。
Non-equilibrium vibrational dissociation of CO$_2$ at low translational-rotational temperatures $T$ is investigated computationally for conditions of microwave induced plasmas. Semi-analytic treatment of vibrational relaxation in CO$_2$ in shock tube and acoustic experiments is summarized. A state-to-state vibrational kinetics model applied for the simulations is benchmarked and adjusted to the relaxation times obtained in gas dynamic experiments. The governing parameter $Q/n^2_0$ has been introduced, where $Q$ is the specific volumetric power coupled in plasma and $n_0$ is the initial number density of CO$_2$. The modelling results indicate a rapid increase of the rate of the primary dissociation process CO$_2$ + M $\to$ CO + O + M when $Q/n^2_0$ exceeds some critical value. A simple analytic calculation of $\left( Q/n^2_0 \right)_{crit}$ is proposed which agrees well with the numerical results. At $T$=300 K the estimated $\left( Q/n^2_0 \right)_{crit} \eqsim 6\cdot10^{-40}$~W$\cdot$m$^3$.
