Temperature Independent Fluidic Resistive Circuits and Concepts

[+] Author and Article Information
T. M. Drzewiecki

Science & Technology Associates, Inc., Arlington, Va 22209

J. Dyn. Sys., Meas., Control 106(1), 98-101 (Mar 01, 1984) (4 pages) doi:10.1115/1.3149671 History: Received March 26, 1982; Online July 21, 2009


This paper discusses series and parallel topologies of orifices and capillaries as fluidic resistors and the way that they relate to temperature sensitivity and temperature compensation. Examination of a laminar flow nozzle, as typically found in a laminar proportional amplifier (LPA), shows that it may be represented by a parallel combination of an orifice and a capillary. As a result a nozzle has inherent temperature insensitive properties that allow temperature independent operation of such laminar fluidic devices as pressure controlled oscillators. It is shown that one may design a constant resistance, within ±0.1 percent, for changes in environmental temperature of ±20°C when air is the working fluid.

Copyright © 1984 by ASME
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