Elongational behavior of gelled propellant simulants
Elongational behavior of gelled propellant simulants
复制标题
凝胶推进剂模拟物的伸长行为
DOI：
10.1122/1.1631423
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发表时间：
2004
影响因子：
3.3
通讯作者：
D. Hasan
中科院分区：
文献类型：
--
作者：
A. Yarin;E. Zussman;A. Theron;S. Rahimi;Z. Sobe;D. Hasan
采用拉伸流变仪研究了凝胶推进剂模拟物在单轴拉伸流动中的流变行为。在简单剪切中，这种流体通常表现出剪切稀化行为，其可以由幂律本构方程描述。这些流体的拉伸行为的知识是很重要的，了解他们的雾化和喷雾形成的过程。本工作的结果表明，三维幂律模型允许这些流体的单轴伸长的描述以及。此外，在简单剪切和单轴拉伸测试流体的流变参数的值相当接近同意。因此，凝胶推进剂模拟物的拉伸行为可以从其剪切行为推断。
An elongational rheometer is used to study the rheological behavior of gelled propellant simulants in uniaxial elongational flow. In simple shear such fluids typically exhibit a shear thinning behavior which could be described by a power-law constitutive equation. Knowledge of the elongational behavior of these fluids is important for understanding the processes of their atomization and spray formation. The results of the present work demonstrated that the three-dimensional power-law model permits description of uniaxial elongation of these fluids as well. Moreover, the values of the rheological parameters of the tested fluids measured in simple shear and in uniaxial elongation agree fairly closely. Therefore the elongational behavior of gelled propellant simulants can be inferred from their shear behavior.