| 薛社生,李守先,王元璋.横向三维化学反应流动数值模拟[J].计算力学学报,2007,24(4):414~419 |
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| 横向三维化学反应流动数值模拟 |
| Numerical simulation of 3D transverse chemistry-reactive flows |
| 修订日期：2005-05-09 |
| DOI：10.7511/jslx20074082 |
| 中文关键词: 化学氧碘激光,特征理论,亚声速,跨声速,超声速,数值模拟 |
| 英文关键词:COIL(Chemical Oxygen-Iodine Laser),characteristic theory,subsonic,transonic,supersonic,numerical simulation |
| 基金项目:国家自然科学基金 |
| 薛社生 李守先 王元璋 |
| 北京应用物理与计算数学研究所 北京100088 |
| 摘要点击次数: 1156 |
| 全文下载次数: 11 |
| 中文摘要: |
| 对一个三维化学反应流程序作了改进,使之适应于模拟带横向碘蒸汽注入的COIL(化学氧碘激光)喷管流动。其中,主副气流的入流边界条件的改进是基本的,重要的。这里,入流边界附近的气体流动被视为一维均熵流动,用双曲方程的特征理论,分析以流量作变量的EULER方程的特征关系,用特征方法数值求解简化的特征方程,从而确定亚声速(跨声速)流动边界点的入流密度或速度。对相关文献提供的算例的计算,佐证了程序改进的有效性。对氮气作载气的条件也作了模拟,得出了与氦气条件不同的流动特征与增益分布特征。 |
| 英文摘要: |
| An improvement on a 3D code with chemical Reaction was made,and the improved code has the capability of modeling COIL(Chemical Oxygen-Iodine Laser) nozzle flows with transverse iodine-injection.In this improvement,determination of the boundary conditions of primary and secondary gases inflows were elementary and important.In detail,gases flows near the boundaries were considered as one-dimensional isoentropic flows,and the characteristic theory of hyperbolic equations was used to analyze the characteristic relatives of EULERIAN equations with mass flow-rate variable.A simplified characteristic equation was numerically solved by characteristic scheme,then the inflow densities or speeds of mixed gases at the subsonic(transonic)boundaries were obtained.The calculation of the example with helium diluent provided by relevant reference was made,and the results agreed well with it.The simulations of the case with nitrogen diluent were also done,and the computational results indicated the different flow feature and gain feature compared with that with helium diluent.These demonstrated the effectiveness of the improved code to model 3D,chemical reactive flows with transverse gases mixing. |
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