Method and apparatus for measuring pressures

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

1976-02-27

1977-09-27

Wood, Donald O.

Measuring and testing

Volume or rate of flow

Tank type

73420, 137112, G01L 700, G05D 1100

Patent

active

040503062

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).

REFERENCES:
patent: 2761463 (1956-09-01), Wagner
patent: 3868625 (1975-02-01), Speigner et al.

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