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Studies on Prediction of Rheological Behaviour of Composite Propellant Formulations Based on Rheological Models

机译：基于流变模型的复合推进剂配方流变行为预测研究

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Rheology of composite propellant slurry is a complex phenomena, where it behaves like nonnewtonian fluid (pseudoplastic and thixotropic) since the viscosity of the slurry depends upon the rate of shear and time of shear. Several mathematical models have been developed to describe the relationship between shear stress and shear rate of non-newtonian fluids. The models used to predict the flow properties to determine the ability of a fluid to perform specific function for non-Newtonian fluids are Ostwald, Herschel-Bulkley, Carreau, Cross, Eyring-prandtl-ree and Tscheuschner. Further each model was suitably studied to predict rheological behaviour and correlation coefficient (R~2) based on the experimental data obtained from various compositions having burning rate in the range of 5 mm/s to 25 mm/s at 70 ksc pressure. The data indicate that Tscheuschner model provides the most appropriate prediction values to rheological behaviour over the entire range of burning rates as values of correlation coefficient (R~2) is very close to the standard value.
机译：复合推进剂浆料的流变学是一种复杂的现象，其行为类似于非牛顿流体（拟塑性和触变性），因为浆料的粘度取决于剪切速率和剪切时间。已经开发了几种数学模型来描述非牛顿流体的剪切应力和剪切速率之间的关系。用于预测流动特性以确定流体对非牛顿流体执行特定功能的能力的模型为Ostwald，Herschel-Bulkley，Carreau，Cross，Eyring-prandtl-ree和Tscheuschner。此外，基于在70 ksc压力下燃烧速率在5 mm / s至25 mm / s范围内的各种成分获得的实验数据，对每种模型进行了适当的研究，以预测流变行为和相关系数（R〜2）。数据表明，Tscheuschner模型在整个燃烧速率范围内为流变行为提供了最合适的预测值，因为相关系数（R〜2）的值非常接近标准值。

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