Electromagnetic analysis in magnetic suspension mechanism of a wind tunnel for spinning body

Issue title: Proceedings from the 17th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2015)

Guest editors: Fumio Kojima, Futoshi Kobayashi and Hiroyuki Nakamoto

Article type: Research Article

Authors: Hasan, Shahajada Mahmudul^* | Mizuno, Takeshi | Takasaki, Masaya | Ishino, Yuji

Affiliations: Department of Mechanical Engineering, Saitama University, Sakura-ku, Saitama, Japan

Correspondence: [*] Corresponding author: Shahajada Mahmudul Hasan, Department of Mechanical Engineering, Saitama University, Shimo-Okubo 255, Sakura-ku, Saitama 338-8570, Japan. E-mail:[email protected]

Abstract: A wind tunnel system for a spinning body has been designed for the measurement of the hydrodynamic forces acting on the body. The body was successfully suspended and rotated by electromagnets. This existing arrangement is required to be enlarged to observe more accurate hydrodynamic forces acting on the body. Therefore, for the further development and control, it is important to understand the exact magnetic flux distribution inside the system as well as the variation of the force with the increase of the current. In this paper, both 2D symmetric model and 3D model of the arrangement are taken in consideration for the analysis. The magnetic flux distributions as well as magnetic force acting on the suspended object are obtained. The magnetic flux densities are analyzed for the variation of current in electromagnets. Actual force acting on the body is also measured. It is observed that the experimental results support the results obtained by numerical analysis.

Keywords: Electromagnetic analysis, magnetic suspension, wind tunnel, spinning body, hydrodynamic force

DOI: 10.3233/JAE-162077

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 1-2, pp. 231-241, 2016