Drag measurements on a laminar-flow body of revolution in the 13-inch magnetic suspension and balance system
Low speed wind tunnel drag force measurements were taken on a laminar flow body of revolution free of support interference. This body was tested at zero incidence in the NASA Langley 13 in. Magnetic Suspension and Balance System (MSBS). The primary objective of these tests was to substantiate the drag force measuring capabilities of the 13 in. MSBS. The drag force calibrations and wind-on repeatability data provide a means of assessing these capabilities. Additional investigations include: (1) the effects of fixing transition; (2) the effects of fins installed in the tail; and (3) surface flow visualization using both liquid crystals and oil flow. Also two simple drag prediction codes were used to assess their usefulness in estimating overall body drag.
Magnetic suspension - Today's marvel, tomorrow's tool
There have been more than a dozen Magnetic Suspension Systems (MSS) built and used during the past 30 years (references 1, 2 and 3). There are now six systems in use around the world. All are small, and generate inadequate levels of Reynolds number for simulation purposes. Because of advances in supporting technologies, and the continued advocacy and development of MSS by Langley Research Center, it is now possible to build MSSs for large tunnels. Advances in superconductivity, large magnet construction, computers, automatic control techniques, and innovation in MSS design, make the use of MSS with large tunnels both possible and very attractive. References 4, 5, and 6 deal with the systems aspect of integrating MSS into large tunnels. Reference 7 updates the status of MSS research.
A shock tube technique for producing subsonic, transonic, and supersonic flows with extremely high Reynolds numbers.
Shock tube technique for producing subsonic, transonic and supersonic flows with high Reynolds numbers