| 郭则庆,姜孝海,王杨.膛口反应流并行数值模拟[J].计算力学学报,2013,30(1):111~116,123 |
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码上扫一扫！ |
| 膛口反应流并行数值模拟 |
| Parallel numerical simulation of muzzle reacting flow |
| 投稿时间：2011-12-14 修订日期：2012-05-26 |
| DOI：10.7511/jslx201301019 |
| 中文关键词: 流体力学 膛口流场 反应流 并行计算 MPI |
| 英文关键词:fluid mechanics muzzle flow field reacting flow parallel computing MPI |
| 基金项目:国家自然科学基金(10902052);南京理工大学自主科研专项计划(2011ZDJH30)资助项目. |
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| 中文摘要: |
| 采用轴对称多组分N-S方程对含有高速运动弹丸的膛口反应流进行了数值模拟。控制方程采用时间分裂方法并在大型计算机上采用MPI方法进行多核并行求解,其中对流项采用二阶AUSM+格式和MUSCL插值方法进行处理,燃气采用氢气-空气混合气,反应机理为9组分19步基元反应。对于弹丸引起的网格运动,采用嵌套网格法处理。并行验证算例与串行计算结果一致,采用20个CPU计算时效率为64%。根据数值结果详细讨论了发射过程中的气体动力学和化学动力学过程,并且通过对两种条件下的计算结果比较分析了化学反应对膛口流场发展的影响。结果表明,上述算法能够较为正确地模拟弹丸和化学反应对膛口流场的影响,并大大提高了计算速度。 |
| 英文摘要: |
| A computational fluid dynamics code for axisymmetric,multi-species,Navier-Stokes equations is developed to simulate the muzzle reacting flow with high-speed projectile.Based on the MPI parallel environment,the equations were solved by using a time splitting method.The convection terms were solved by using AUSM+ scheme with MUSCL interpolation method,and chemical kinetics for hydrogen-air mixture was dealt with by 9-species,19-step elementary reacting model.Chimera grid method was employed for the consideration of the moving projectile.The parallel validation example is in good agreement with the serial results,and the parallel computing efficiency reaches 64% by using 20 CPUs.The aerodynamics and chemical kinetics processes in the muzzle flow are discussed in detail according to the computational results.The result shows that,the method above mentioned is suitable for the simulation the reacting flow with high-speed projectile,and the computing speed is increased efficiently. |
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