| 非牛顿流体自然收敛半角方程的实验验证 |
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| 引用本文： | 梁基照.非牛顿流体自然收敛半角方程的实验验证[J].化工学报,1996(6). |
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| 作者姓名： | 梁基照 |
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| 作者单位： | 华南理工大学化工机械系!广州510641 |
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| 摘 要： | 引言非牛顿流体从大截面流道进入小截面流道时形成的收敛流动，是工业过程中常见的流型，如石油输运、聚合物加工过程等．流体的自然收敛角定量地描述了流体在流道入口前区的流动形态．在先前的工作中，作者应用最小能原理，导出非牛顿流体自然收敛半角方程式中，e是Bagley校正因子，n是非牛顿指数，是与流体的粘附性能有关的系数．聚合物熔体属于典型的非牛顿流体．本工作中，拟在考察聚乙烯熔体于毛细管挤出过程中流变行为的基础上，对方程（2）作初步验证1实验1.1原材料选用高密度聚乙烯（HDPE）和低密度聚乙烯（LDPE）作为试样材料…
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| 关 键 词： | 非牛顿流体 聚乙烯 挤出流动 入口收敛 模型验证 |
EXPERIMENTAL VERICATION FOR HALF NATURAL CONERGING ANGLE EQUATION OF NON-NEWTONIAN FLUIDS |
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| Liang Jizhao.EXPERIMENTAL VERICATION FOR HALF NATURAL CONERGING ANGLE EQUATION OF NON-NEWTONIAN FLUIDS[J].Journal of Chemical Industry and Engineering(China),1996(6). |
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| Authors: | Liang Jizhao |
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| Abstract: | The rheological properties of high and low density polyethylene(HDPE and LDPE)melts were investigated by using capillary rheometer,and preliminary verification for the half natural converging angle equation of non-Newtonian fluids which was derived in a prerious work was made.The results showed that the natural convergent angles of the sample melts calculated by using the equation were in correspondence with the values reported in the literature under the relevant conditions. |
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| Keywords: | non-Newtonian fluids polyethylene extrusion flow entry convergence model test |
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