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含能材料  2006 

散心爆轰数值模拟中人为粘性与空间步长的匹配关系

Keywords: 爆炸力学,散心爆轰,数值模拟,人为粘性,空间步长

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Abstract:

应用Lee-Tarver反应率和JWL状态方程,得到了散心爆轰数值模拟中人为粘性系数与空间步长之间的匹配关系:距球心越近的计算单元,其人为粘性系数应越大。远离球心处的计算单元,其粘性系数接近一维平面情形。计算了炸药PBX-9404的球面散心爆轰过程,结果表明,利用所得人为粘性系数与空间步长之间的匹配关系,可以得到符合散心爆轰波特性的结果。

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