Turbulence Suppression in an Axially Rotating Pipe

The phenomenon of turbulence suppression in a rotating pipe flow system has been well documented by past research and experimentation. Despite this, the methods that drive this phenomenon have not yet been effectively characterized, especially at higher Reynolds numbers. While many experiments have been performed to better understand swirling turbulent pipe flow, a difficulty that arises is how to test for high levels of rotation without reducing the Reynolds number. This thesis documents the design and construction of a new pressurized pipe flow system at the University of Kentucky aimed at achieving high Reynolds numbers without causing a reduction in rotation number. The facility has been designed to allow for particle imaging velocimetry experiments to be conducted at multiple length throughout a developing rotating pipe flow. This thesis also documents an experiment carried out on this new apparatus to confirm functionality and to determine the relationship between friction factor reduction, rotation number, and Reynolds number in a rotating turbulent pipe flow. This experiment found that the friction factor within the system decreased as rotation number increased in a manner independent of Reynolds number. Finally, recommendations are made on future improvements to the facility and future experimentation