Total pressure probe

Details Total pressure probe Total pressure probe

1981-11-27

1984-02-28

Myracle, Jerry W.

Measuring and testing

Volume or rate of flow

Using differential pressure

G01F 146

Patent

active

044335849

ABSTRACT:
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.

REFERENCES:
patent: 3029639 (1962-04-01), Groesbeck

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