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肖保国 杨顺华 邢建文 赵慧勇. 煤油简化动力学和ISAT在超燃计算中的应用[J]. 力学学报, 2010, 42(6): 1090-1097. DOI: 10.6052/0459-1879-2010-6-lxxb2009-490
引用本文: 肖保国 杨顺华 邢建文 赵慧勇. 煤油简化动力学和ISAT在超燃计算中的应用[J]. 力学学报, 2010, 42(6): 1090-1097. DOI: 10.6052/0459-1879-2010-6-lxxb2009-490
Yang Shunhua. Implementation of reduced chemical kinetics for kerosene combustion and in situ adaptive tabulation in parallel computations of scramjet[J]. Chinese Journal of Theoretical and Applied Mechanics, 2010, 42(6): 1090-1097. DOI: 10.6052/0459-1879-2010-6-lxxb2009-490
Citation: Yang Shunhua. Implementation of reduced chemical kinetics for kerosene combustion and in situ adaptive tabulation in parallel computations of scramjet[J]. Chinese Journal of Theoretical and Applied Mechanics, 2010, 42(6): 1090-1097. DOI: 10.6052/0459-1879-2010-6-lxxb2009-490

煤油简化动力学和ISAT在超燃计算中的应用

Implementation of reduced chemical kinetics for kerosene combustion and in situ adaptive tabulation in parallel computations of scramjet

  • 摘要: 利用基于``准稳态''方法建立的模型简化软件包SPARCK, 从建立的详细模型出发得到了一个包含22组分18步总包反应的煤油简化动力学模型. 简化模型计算得到的点火延迟时间与文献计算结果和实验结果相一致, 验证了模型的有效性. 采用简化模型和当地自适应建表(ISAT)方法, 对超燃冲压发动机进行了二维并行数值模拟, 计算得到的壁面压力分布与试验结果吻合较好, 表明简化模型能够很好地用来模拟煤油燃料超燃发动机内部的复杂燃烧过程. 在并行计算环境下, 和直接积分方法相比, 该方法将化学反应项的计算速度提高了3.73倍, 大大提高了计算效率.

     

    Abstract: A detailed chemical kinetics model including 109 speciesand 946 elementary reactions for kerosene combustion was obtained. Then,using the software SPARCK (Software PAckage for Reduction of ChemicalKinetics) which is based on quasi-stationary state approximation andspecifically developed for chemical reaction kinetics reduction, a reducedmodel with 22 species and 18 global reactions was achieved. The calculatedignition delay with this reduced model gives a good agreement with referenceand experimental results to verify the reliability of the model. The 2-Dparallel numerical simulation of scramjet was performed using in situadaptive tabulation (ISAT) and the reduced model. The calculated results show thatthe distribution of wall pressure agrees well with the experimentalmeasurements, and the reduced model can simulate well the complex combustionphenomena in a kerosene-fueled scramjet. Compared with that of the directintegration method, the results show that ISAT method can reduce the CPUtime up to 3.73 times under the present parallel environment and thecomputational efficiency can be dramatically enhanced.

     

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