Magnetic fluids in aerodynamic measuring devices

The paper presents the operating principle for inductive transducers with magnetic fluids used in aerodynamic measuring devices, as well as some of their dimensioning relations. Their performances are exemplified through several concrete applications concerning the measurement and control of: pressure distributions on aerodynamic profiles; small and very small volumetric flow rates (leakage flow); degree of porosity of casting; very small displacements using pneumatic devices. A two-axes inclinations transducer was experimentally investigated in wind turbine construction. (C) 1999 Elsevier Science B.V. All rights reserved.