This paper presents drag force improvement for the NCKU 10 cm x 10 cm magnetic suspension wind tunnel (MSWT). Theoretical analysis of system modification is formulated to study the governing force balance relationship in the test section. Numerical simulation has proved that the modified system can obtain better drag performance. In the implementation, the modified system with two additional drag coils is constructed based on the original configuration to increase drag stiffness and robustness. Force and moment calibration verifies the effectiveness and improvement obtained due to the modification. In MSWT, the magnetic field distribution within the test section is not linear, so it does cause balance or control problems. A current loop feedback is applied in the modified system to enhance the control capability for high speed flows. Both the static and dynamic behaviors of the modified system are examined. The overall system characteristics reveal that the modified system has better drag and control performance in practical applications.
|Number of pages||11|
|Journal||Proceedings of the National Science Council, Republic of China, Part A: Physical Science and Engineering|
|Publication status||Published - 2000 Sep 1|
All Science Journal Classification (ASJC) codes