Accession Number : ADD008110

Title :   Fluidic Pressure Ratio Sensor.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Stignani,David A

Report Date : 13 Jan 1981

Pagination or Media Count : 4

Abstract : This patent relates to a pressure ratio detector having a housing with a flow channel through the housing. A plug, having helical grooves, is positioned in the flow channel. A sudden expansion region is provided in the flow channel downstream of the plug which induces a nutation in the flow. The acoustic nutational frequencies are measured with a piezoelectric transducer to provide an output signal proportional to the pressure ratio across the device. An orifice device is provided in the inlet to adapt the device for measuring pressure ratios greater than 2.0.

Descriptors :   *Patents, *Pressure measurement, *Fluidics, Ratios, High pressure, Low pressure, Piezoelectric transducers, Flow fields, Jet engine inlets, Aircraft engines

Subject Categories : Fluidics and Fluerics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE