Rotor/shroud clearance control system

Details Rotor/shroud clearance control system Rotor/shroud clearance control system

1978-07-17

1980-10-28

Powell, Jr., Everette A.

Rotary kinetic fluid motors or pumps

Method of operation

415 51, 415138, 415175, F01D 1108

Patent

active

042304369

ABSTRACT:
Cooling airflow to the shroud support apparatus is varied in response to both rotor speed and elapsed time above a predetermined level by the selective use and mixture of two air sources at different temperatures. For steady-state operation, each of four different operating modes has its prescribed cooling air delivery mode such that, generally, as the engine speed and cycle temperatures increase, so does that of the cooling air. For transient operation, a timer is employed to sequence the desired cooling air delivery modes in such a manner as to maintain optimum rotor-to-shroud clearances during the transient period.

REFERENCES:
patent: 3391904 (1968-07-01), Albert et al.
patent: 3453825 (1969-07-01), May et al.
patent: 3583824 (1971-06-01), Smuland
patent: 3584458 (1971-06-01), Wetzler
patent: 3966354 (1976-06-01), Patterson
patent: 3975901 (1976-08-01), Hallinger et al.
patent: 4005946 (1977-02-01), Brown
patent: 4069662 (1978-01-01), Redinger et al.
patent: 4102595 (1978-07-01), Wibbelsman
patent: 4117669 (1978-10-01), Heller

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