分裂算法对准爆轰波数值模拟的影响
Influence of operator-splitting algorithm on numerical simulation of quasi-detonation
查看参考文献13篇
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文摘
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本文分析了数值模拟中的分裂算法的特性及其对燃烧模拟结果的影响. 跟理论结果相比, 分裂算法会造成系统动量的不守恒. 提出了对数值结果进行修正的模型, 利用该模型, 模拟得到了准爆轰波.分析了准爆轰波的热力学特性, 表明准爆轰波是热壅塞的, 是声速附近的加热流动. 模拟得到的准爆轰波特性跟实验结果吻合得很好, 表明本文所讨论的物理问题及所提出的模型是准确的. |
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其他语种文摘
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In this paper, the characters of operator-splitting algorithm in numerical simulations of combustion are analyzed. In numerical simulations, the combustion is handled using an operator-splitting algorithm so that during each time step the motionless fluid is first allowed to react at constant volume and then subsequently the nonreactive fluid is allowed to convert. This algorithm would violate the conservation of momentum of the combustion system. Therefore, a correction model is introduced to correct the numerical results of operator-splitting algorithm. Quasi-detonation is a special combustion phenomenon which is frequently observed in experiments. But its mechanism cannot be simulated by the conventional operator-splitting algorithm. In this research, quasi-detonation is simulated by using this correction model, which is in good agreement with experimental results. The thermodynamic characters of quasi-detonation show that it is thermally choked. These results show that the problem posed and the correction model introduced are correct. |
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来源
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中国科学. 物理学
, 力学, 天文学,2014,44(11):1213-1219 【核心库】
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DOI
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10.1360/sspma2013-00031
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关键词
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爆轰波
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准爆轰波
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燃烧
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分裂算法
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地址
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中国科学院力学研究所, 高温气体动力学国家重点实验室, 北京, 100190
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1674-7275 |
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学科
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力学 |
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基金
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国家自然科学基金资助项目
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文献收藏号
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CSCD:5278700
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