Process for detection of rotating stall

Details Process for detection of rotating stall Process for detection of rotating stall

1981-08-13

1984-02-14

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

60 39161, 60 3927, 60 39281, 60 3929, F02C 928

Patent

active

044308558

ABSTRACT:
A process and a device for detecting a rotating stall in a turbojet engine having two rotating spools including a high pressure spool and a low pressure spool, wherein the rotation speed (N.sub.HP, N.sub.BP) of each of said spools is measured, and the derivative relative to time dN.sub.HP /dt of the rotation speed (N.sub.HP) of the high pressure spool is derived. A command signal is generated as soon as the following conditions are met: ##EQU1## where A, B and C are constant values.

REFERENCES:
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patent: 2918790 (1959-12-01), Schoch
patent: 3638422 (1972-02-01), Loft
patent: 3854287 (1974-12-01), Rembold
patent: 3971208 (1976-07-01), Schwent
patent: 4060979 (1977-12-01), Elsaesser et al.
patent: 4060980 (1977-12-01), Elsaesser et al.
patent: 4117668 (1978-10-01), Elsaesser et al.

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