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Novel management of transducer heat and nonlinearity

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N00014-10-C-0100
Agency Tracking Number: N08A-020-0233
Amount: $499,389.00
Phase: Phase II
Program: STTR
Solicitation Topic Code: N08-T020
Solicitation Number: 2008.A
Solicitation Year: 2008
Award Year: 2010
Award Start Date (Proposal Award Date): 2009-12-23
Award End Date (Contract End Date): 2011-06-22
Small Business Information
5 Constitution Way
Woburn, MA 01801
United States
DUNS: 106736585
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Robert O''Handley
 Chief Scientist
 (781) 935-7878
Business Contact
 Jiankang Huang
Title: President
Phone: (781) 935-7878
Research Institution
 Carnegie Mellon University
 Michael E McHenry
248 Roberts Hall 5000 Forbes Avenue
Pittsburgh, PA 15213
United States

 (412) 268-2703
 Nonprofit College or University

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.

* Information listed above is at the time of submission. *

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