Method and a device for detecting the stall condition of an axia

Details Method and a device for detecting the stall condition of an axia Method and a device for detecting the stall condition of an axia

1976-08-12

1977-11-01

Ruehl, Charles A.

Measuring and testing

Test stand

For engine

73168, 340 27SS, G01M 1500

Patent

active

040559947

ABSTRACT:
The stall condition occurring in the unstable working range of an axial flow fan or compressor arranged in an air duct is detected by measuring the pressure difference between the total air pressure acting in a direction opposite to the direction of revolution of the fan wheel and a reference pressure corresponding substantially to the static pressure at the wall of the air duct in the same radial measuring plane. The detector device comprises first and second pressure measuring probes of an open tubular configuration for measuring said total pressure and reference pressure, respectively, and means for detecting the difference between the pressure values measured thereby, said probes being designed and arranged in the air duct so that the flow conditions around them are equal in the stable working range of the fan or compressor.

REFERENCES:
patent: 3677000 (1972-07-01), Thomson
patent: 3886790 (1975-06-01), Plett
patent: 3935558 (1976-01-01), Miller et al.
patent: 3938319 (1976-02-01), Thomson

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