| COIL化学非平衡流动的一种解耦方法研究 |
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| 引用本文： | 张黎,叶正寅,王刚.COIL化学非平衡流动的一种解耦方法研究[J].空气动力学学报,2008,26(2). |
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| 作者姓名： | 张黎 叶正寅 王刚 |
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| 作者单位： | 西北工业大学,翼型叶栅空气动力学国防科技重点实验室,陕西,西安 710072 |
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| 基金项目： | 教育部高等学校优秀青年教师教学科研奖励计划 |
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| 摘 要： | 提出了一种计算氧碘化学激光器化学非平衡流动的解耦方法.求解二维可压缩非定常N-S方程及组分连续方程,计算氧碘化学激光器中的组分混合反应流场.空间离散格式为AUSM up格式,用四步龙格-库塔方法作显式时间推进.假设混合气体为热力学完全而热值非完全气体,化学反应模型采用有限速率反应模型.使用一种"点隐式"方法来处理化学源项的刚性问题.计算结果表明本文方法可以有效解决计算中的刚性问题,与现有隐式算法相比减少了大量的矩阵运算,公式推导简单,易于实现和改进.
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| 关 键 词： | 氧碘化学激光器 化学非平衡流动 解耦方法 |
An uncoupled method for numerical simulation of the nonequilibrium flow in COIL |
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| Zhang Li,Ye Zheng-yin,Wang Gang.An uncoupled method for numerical simulation of the nonequilibrium flow in COIL[J].Acta Aerodynamica Sinica,2008,26(2). |
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| Authors: | Zhang Li Ye Zheng-yin Wang Gang |
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| Abstract: | An uncoupled method was introduced to simulate numerically nonequilibrium flow which had the stiffness problem.Mixing reaction flows in COIL are simulated by solving the Reynolds averaged Navier-Stokes equations and species continuity equations.Equations are solved using four-stage Runge-Kutta time-stepping scheme on structured viscous mesh.The simulations are carried out with AUSM up scheme.The method employs finite-rate chemistry and thermodynamic perfect gas properties for chemical reaction.The stiffness problem of chemical source is overcome by a semi-implicit method.The COIL numerical results are in good agreement with the results of AeroSoft's GASP8]. |
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| Keywords: | COIL(chemical oxygen iodine laser) nonequilibrium flow uncoupled method |
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