United Technologies Corporation

Rocco M Tommasini

Joseph M Kokoszka

John L Pannone

Joseph J Haloburdo, Jr

A pressure and temperature measuring probe with a low drag, airfoil shaped cross section includes a longitudinally extending pressure cavity adjacent the leading edge and a separate longitudinally extending temperature cavity immediately downstream thereof. Longitudinally spaced apart passages extend downstream from their inlets at pressure measuring stations along the leading edge and intersect the pressure cavity. At temperature measuring stations along the leading edge passages extend downstream adjacent the pressure cavity to intersect the temperature cavity and direct a high velocity flow of gases over a thermocouple junction disposed within the temperature cavity. Stagnation devices at the leading edge reduce gas velocity to zero at the passage inlets.

Temperature and pressure probe

The inlet for a temperature measuring probe mounted in the leading edge of a strut or vane is constructed to project beyond the leading edge into the flow stream being measured and having the end scarfed in the direction of the flow stream. This measuring probe has particular utility where the flow direction changes as in gas turbine power plant.

Temperature probe for rotating machinery

A detector-transducer 26 for sensing temperatures in an engine is disclosed. A temperature signal generated by a temperature sensing device 28 is biased by a supplementary thermocouple 30. A resistor 52 is in series with the temperature sensing device. The supplementary thermocouple is in parallel with the resistor 52. In one embodiment the temperature sensing device is the junction of a second thermocouple.

Detector-transducer for sensing temperatures in an engine

A pressure probe 26 for sensing total pressure in a duct 16, 22 bounding a flow path 12 for a working medium fluid is disclosed. The probe has an alignment portion 32, a sensor portion 34 spaced from the alignment portion leaving a plenum 36 therebetween and passageways 41 for ducting the flow away from the plenum. In one particular embodiment a transition passageway 54 extends between the plenum and the passageway 41. The alignment portion has a first passageway 42 directed towards a second passageway 40 in the sensor portion. The sensor portion has a wall 38 disposed about the second passageway 40. A method is disclosed for sensing total pressure which includes the steps of: diverting a portion of the flow from the working medium flow path to the pressure probe; converting the total pressure of the diverted flow to a static pressure and to a velocity pressure wherein the velocity pressure results from flow along streamlines parallel to the first passageway; inpacting substantially all of the diverted portion of the flow against the sensor portion in the wall region bounding the plenum; and, sensing the static pressure of the flow in the wall region of the plenum to sense total pressure; and ducting all of the diverted flow away from the plenum.

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West Hartford, CT, United States of America

Rocco M Tommasini