DRA-1. A test loop for determining friction losses in pipe flow.

摘要

An experimental rig has been built to determine friction losses in pipe flow. Four interchangeable test sections, with internal diameters of 10, 13, 20 and 44 mm respectively, may be inserted in the loop, two of them simultaneously. The temperature of the circulating fluid is varied from 25 to 120 deg C. Its flow-rate may be adjusted between 0.5 kg/min and 180 kg/min, depending on which test sections are in use. The mean wall shear stress that can be obtained is in excess of 100 Pa. The rig will be used to study the drag reducing effect and to characterize drag reducing additives.