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.