并行原位自适应建表方法在超燃计算中的应用

An application of parallel in situ adaptive tabulation method in calculation of supersonic combustion

分别采用直接积分方法(DI)和并行原位自适应建表方法(ISAT)对二维超声速燃烧室进行了计算,并与试验结果进行了比较。从对比结果可以看出,ISAT方法和DI方法计算的压力和组分分布结果基本一致,壁面压力分布与试验结果相吻合,能够满足计算的精度要求。在本文并行计算环境下,和DI方法相比,在化学反应计算速度上,ISAT方法最低提高了3.34倍,最高达到约40倍。

The direct integration（DI） method and parallel in situ adaptive tabulation（ISAT） method were used,respectively,to simulate flow in a two dimensional supersonic combustor.The calculated wall pressure with ISAT method gives good agreement with that of DI method and experimental data.Comparison of species mass fraction at different location along combustor shows that the ISAT method has better accuracy and higher efficiency than DI method for the present study,which gives the minimum speedup ratio of 3.34 and maximum speedup ratio of 40 under the present parallel environment.