This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Development of a Passive Magnetic Levitation System for Wind Tunnel Models
Technical Paper
2006-01-0566
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Rolling road testing at model scale is most often done using a wide-belt to provide a good simulation of the relative movement between the vehicle and the road. This generally requires the use of struts to hold the model under test in position, and the aerodynamic interference of these struts can be significant. A non-intrusive method of model testing would therefore be desirable. Many alternatives for reducing or eliminating the strut interference have been considered; of these magnetic levitation has been identified as the approach with the greatest ultimate potential. Previous attempts at magnetic levitation within the aerospace community have been restricted to small scale due to the large magnetic air gap required between the model and the tunnel walls. For ground vehicles, however, the gap between the underside of the model and the tunnel floor is relatively small, providing an opportunity for magnetic levitation on a practical scale. This paper documents the design and development of a magnetic levitation system to support ground vehicle models in a wind tunnel over a rolling road at up to 40% scale. The system uses a combination of permanent magnets, electromagnets and bulk type II high temperature superconductors (HTS). The superconductors provide intrinsic damping in order to make the system robust with respect to power / computer failure which could otherwise cause a sudden loss of levitation stability.
Recommended Content
| Technical Paper | The Immersed Boundary CFD Approach for Complex Aerodynamics Flow Predictions |
| Technical Paper | Aerodynamic Braking for High-Speed Motorcycles |
| Technical Paper | Practical Economic Aspects of Tractor/Trailer Aerodynamics |
Authors
Topic
Citation
Muscroft, R., Sims-Williams, D., and Cardwell, D., "The Development of a Passive Magnetic Levitation System for Wind Tunnel Models," SAE Technical Paper 2006-01-0566, 2006, https://doi.org/10.4271/2006-01-0566.Also In
SAE 2006 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V115-6; Published: 2007-03-30
Number: V115-6; Published: 2007-03-30
References
- Hetherington, B. Sims-Williams D. B. 2006 Support Strut Interference Effects on Passenger and Racing Car Wind Tunnel Models SAE Congress 2006 Detroit
- NASA Magnetic Suspension and Balance System 1991 http://grin.hq.nasa.gov
- Earnshaw W. 1842 On the nature of the molecular forces which regulate the constitution of the luminiferous ether Trans. Camb. Phil. Soc. 7 97 112 1842
- Sawada, H. Kunimasu, T. 2001 Status of MSBS Study at NAL In 6 th Int. Symp. On Mag. Sus. Tech Politechnico di Torino, Italy October 2001
- Bednorz T. G. Muller K. A. 1986 Possible high Tc superconductivity in the barium-lanthanum-copper-oxygen system Z. Phys. B 64 189 1986
- Hor P.H. Gao L. Meng R. L. Huang Z. J. Wang Y., Q. Forster K. Vassilious J. Chu C. W. Wu M. K. Ashburn J. R. Torng C. J. 1987 High-Pressure Study of the New Y-Ba-Cu-O Superconducting Compound System Phys. Rev. Lett. 58 911 1987
- Yang W. M. Zhou L. Feng Y. Zhang P. X. Nicolsky R. de Andrade R. Jr 2003 The characterization of levitation force and attractive force of single-domain YBCO bulk under different field cooling process Physica C 398 2003 141 146
- Feng Y. Pradhan A. K. Zhao Z. Wu Y. Koshizuka N. Zhou L. 2001 Influence of Ho substitution for Y on flux pinning in melt-processed YBCO superconductors Physica C 357-360 2001 799 802
- Coey J. M. D. 2002 Permanent magnet applications Journal of Magnetism and Magnetic Materials 248 2002 441 456