Novel management of transducer heat and nonlinearity

Ferro Solutions has demonstrated in Phase I that ferro fluids can be used to create a self-pumping cooling system that can extend the life and improve performance of highpower transducers or other electro-mechanical devices. In the Phase I demonstration a resistor submerged in a ferrofluid was powered so that its temperature increased to over 1200C. Upon introduction of the appropriate magnetic field gradient the temperature of the resistor was decreased by about 650C. In Phase II, we extend this demonstration by modifying a single-crystal-piezobased Tonpilz transducer using the following steps. New ferrofluids will be fabricated to have properties more suited to the transducer design to be modified. Mathematica?? and COMSOL?? models will be extended to fully describe both the field gradient and the magneto-fluid dynamics that govern the cooling of the transducer. Based on these model results and the performance characteristics of the transducer, an enclosure for the ferrofluid will be designed for the interior spaces of the transducer. The modified transducer will be tested in water and its performance compared with that of an unmodificed transducer of the same design.