Abstract: In this article,the pressure drop equation is derived for the Laminar helical flow of Power Law fluids in the annular space and a method is introduced to calculate the pressure drop with the above equation,Also,the theoretical pressure drop calculated with the equation is compared with the actually-measured pressure drop from experiments on the helical flow of CMC and nolyarylamide solutions in watar.The result shows that both the equation and the method are correct.

摘要： 本文推导了幂律液体环形空间层流螺旋流的压降方程,介绍了由压降方程计算幂律液体环形空间层流螺旋流的压降的方法。并通过CMC水溶液和聚丙烯酰胺水溶液的螺旋流实验,把由压降方程算得的理论压降和实测压降做了对比。对比结果说明,上述的压降方程和计算压降的方法是正确的。