Free Gyroscope Experiments of Two Immiscible Liquids in a Partially Filled Cylinder
ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
Pagination or Media Count:
Gyroscope experiments have been conducted to measure the yaw growth rate in a cylinder filled with two immiscible liquids silicone oil and water. The experimental data were obtained by measuring the yaw history was processed to obtain the yaw growth rate induced by the liquid. Yaw histories were obtained for a 90 filled cylinder height - 25.78 cm and diameter 8.24 cm spinning at 50 revsec. The aspect ratio heightdiameter of the cylinder was 3.126. The composition of the liquid payload was changed by varying the oil to water ratios - ratios of 1000, 8515, 7525, 3070, 1585, and 0100 were tested. The experimental data were found to be consistent with a recent theory by Murphy. However, a small, but consistent, bias was observed between the measured and predicted values of yaw frequency at the maximum growth rate the experimental values were slightly larger.
- Fluid Mechanics