|
|
Experiment on drag reduction characteristics of xanthan
gum solution in pipe flow |
School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
|
|
Abstract The systematic experiments on drag reduction characteristics of xanthan gum solution in continuous cycle smooth pipes with diameters of 5, 10 and 20 mm were respectively conducted. The concentration and pipe diameter effects and the withstanding mechanical degradation of xanthan gum solution on drag reduction characteristics were analyzed to obtain relationship between drag reductions and concentration of xanthan gum solution, influence of Reynolds number on drag reductions and percent drag reduction changing with shearing time. The experimental results show that xanthan gum solution is good drag reduction agent. At low Reynolds number, xanthan gum solution performs typeB drag reduction characteristics in small pipes with diameter of 5 mm and 10 mm, but shows typeA drag reductions characteristics in large pipe with diameter of 20 mm. At high Reynolds number, the xanthan gum solution performs typeB drag reduction characteristics in all pipe flows with three diameters. Xanthan gum solution exhibits high resistance to mechanical degradation because of the essential typeB drag reduction characteristics.
|
|
|
|
|
|
|
|