Fluidic resistive element

• Main Author: DRZEWIECKI; TADEUSZ M
• Format: Patent
• Language: English
• Published: 14.09.1976
• Subjects: BLASTING; FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING ORCONTROL PURPOSES; FLUID-PRESSURE ACTUATORS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; WEAPONS

A resistive element for a fluidic system having a load and a supply of working fluid at a supply pressure which is a constant independent of temperature. The resistive element comprises a housing, of a relatively low temperature coefficient of expansion material such as a steel, enclosing a pair of coplanar plates of predetermined dimensions and fabricated from a relatively high temperature coefficient of expansion material, such as a magnesium alloy. The adjacent walls of the plates define the sidewalls of a channel for fluid flow. The plates are slidably mounted inside the housing so as to vary the width of the rectangular channel at a constant rate in response to incremental variations in the fluid temperature. The constant variation in channel width keeps the Reynolds number of the fluid passing through the channel at a substantially constant value despite small increments in the fluid temperature about its operating temperature.