Drag Reduction Caused by High Polymer Solutions Injected into Water Flowing around Cylindrical Bodies

摘要

It was clearly demonstrated that high polymer solutions of a few parts per million by weight substantially reduce the drag on cylindrical bodies, with spherical ends, which are suspended in water flowing in a pipe. The finding is similar to that obtained by investigators for the reduction of resistance to flow of liquids in pipes alone. It is demonstrated that the water tunnel, the measuring equipment, and the method of study are extremely convenient and effective for studying the important phenomena associated with drag reduction caused by dilute solutions of high polymers. (Author)