【摘要】 通过分析具有假塑性流体特性的原油在加热输送管道中的摩阻损失特点,提出了随输油温度降低,非牛顿原油摩阻损失下降的临界有效管流剪切率的概念和计算公式。相对牛顿流体,当流量增大时,非牛顿原油的摩阻损失增加幅度减小,并且原油流变指数越小,这种趋势越大;对于热输非牛顿原油管道,管道的临界有效管流剪切率只与所输原油的性质有关。更多还原

【Abstract】 The friction drag characteristics is analyzed for the crude oil which has the behavior of psuedo-plastic fluid,when the crude oil transported in heat pipe. The concept and calculations are proposed for the critical effective shear rate of pipe flow that the friction loss of non-Newtonian crude oil is decreased as the transporting temperature is declined. For the Newtonian fluid,the increment magnitude of friction loss of non-Newtonian fluid is decreased as flow rate is increased,and the less the rheological index of oil is,the more the trend is;for the hot oil pipeline transporting the crude oil of non-Newtonian fluid,the shear rate has only relations to the behavior of the crude oil to be transported.更多还原