M1近似应用于强爆炸火球辐射输运数值模拟 |
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引用本文: | 闫凯,田宙,郭永辉,董楠.M1近似应用于强爆炸火球辐射输运数值模拟[J].爆炸与冲击,2014,34(2):241-246. |
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作者姓名: | 闫凯 田宙 郭永辉 董楠 |
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作者单位: | 西北核技术研究所,陕西 西安710024 |
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基金项目: | 国家自然科学基金项目(91330205) |
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摘 要: | 推导了P1近似、Minerbo近似和M1近似模型中Eddington因子和辐射输运方程的最大特征值随各向异性因子的变化关系。采用M1近似模型对1kt TNT当量的强爆炸火球的辐射输运过程进行了数值模拟,给出了火球阵面和冲击波阵面走时,并与已有计算结果进行了比较。结果表明:辐射扩张阶段M1近似下得到的辐射波波速快于P1近似下的计算结果,落后于Minerbo近似下的计算结果,而在冲击波扩张阶段三者计算结果又趋于一致。
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关 键 词: | 爆炸力学 M1近似模型 辐射输运 强爆炸火球 Eddington因子 |
收稿时间: | 2012-08-28 |
Application of M1approach to numerical simulation of radiative transfer in strong explosion fireball |
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Affiliation: | Northwest Institute of Nuclear Technology, Xi'an 710024, Shaanxi, China |
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Abstract: | AccordingtotheequationsfortheP1,MinerboandM1approachmodels,thevariationsof
theirEddingtonfactorswiththeanisotropyfactorswerederivedaswellasthemaximumeigenvalues
ofthemomentequationsoftheradiativetransferagainsttheanisotropyfactors,respectively.Andthe
M1approachmodelwasusedtonumericallysimulatethefirballradiatvetransferfroma1-ktTNTequivalentexplosion.
Thefireballandshockwavefrontsweregivenandcomparedwiththosebythe
differentapproachmodels.NumericalexperimentsshowthattheradiationwavevelocitybytheM1
approachisfasterthanthatbytheP1approach,butslowerthanthatbytheMinerboapproach.Inthe
stageoftheshockwaveexpansion,theradiationwavevelocitiesbythesethreeapproachesareconsistentwitheachother. |
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Keywords: | mechanicsofexplosion M1approachmodel radiativetransfer strongexplosionfireball Eddingtonfactor" target="_blank">Eddingtonfactor')" href="#"> Eddingtonfactor |
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