Method and apparatus for measuring pressures

Details Method and apparatus for measuring pressures Method and apparatus for measuring pressures

G - Physics

01

L

73/133

G01L 19/00 (2006.01) F01D 21/00 (2006.01) G01M 15/00 (2006.01)

Patent

CA 1076838

13DV-6725 METHOD AND APPARATUS FOR MEASURING PRESSURES Abstract A pair of pressure sensing probe tubes are placed in the fan discharge of a turbofan engine, aft of the outlet guide vanes (OGVs) the tubes being circumferentially spaced by a fraction of the OGV pitch. A comparing means receives both pressures sensed by the double-barrelled probes and aerodynamically actuates to automatically select the higher of the two pressures. An accurate pressure indication representative of the mainstream pressure is therefore obtained despite the localized lower pressure turbulence area that may be caused by the presence of the upstream outlet guide vane(s).

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