Random packing of heterogeneous propellants
Random packing of heterogeneous propellants
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DOI：
10.2514/2.1361
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发表时间：
2001-04-01
期刊：
影响因子：
2.5
通讯作者：
Buckmaster, J
中科院分区：
文献类型：
--
作者：
Knott, GM;Jackson, TL;Buckmaster, J
采用随机填充算法建立非均质推进剂的数值模型。这些模型由球体在周期性立方体中的随机分布组成。球体可以分成不同的大小，如果需要可以随机分配。计算了双峰模型（两种不同尺寸的球体）的堆积分数，并与钢丸的旧实验数据进行了比较。立方体的切片定义了代表推进剂表面的表面，这些表面的化学计量是一个随机变量。构建了推进剂立方体的几种实现，并使用直方图和傅立叶级数检查了表面化学计量的变化。给出了一个计算实例，并利用单个曲面实现定义的数据进行了求解。
A random packing algorithm is implemented to construct numerically models of heterogeneous propellants. These models consist of random distributions of spheres in a periodic cube. The spheres can hal-e various sizes, randomly assigned if desired. Packing fractions are calculated for a bimodal model (spheres of two different sizes) and compare vi ell with old experimental data for steel shot. Slices through the cube define surfaces that represent propellant surfaces, and the stoichiometry of these surfaces is a stochastic variable. Several realizations of the propellant cube are constructed and variations in surface stoichiometry are examined using histograms and Fourier series. A sample dame calculation is presented and solved using data defined by a single surface realization.