US 11,674,760 B2
Method and a system for regulating a temperature associated with a heat exchanger assembly of a turbine engine
Cedrik Djelassi, Moissy-Cramayel (FR); and Pierre Cabrera, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
Filed on Oct. 29, 2021, as Appl. No. 17/452,978.
Application 17/452,978 is a division of application No. 16/161,242, filed on Oct. 16, 2018, granted, now 11,209,227.
Claims priority of application No. 17 59906 (FR), filed on Oct. 20, 2017.
Prior Publication US 2022/0049911 A1, Feb. 17, 2022
Int. Cl. F28F 27/02 (2006.01); F02C 6/08 (2006.01); F02C 9/18 (2006.01); F02C 7/18 (2006.01); F01D 25/12 (2006.01); B64D 13/06 (2006.01); B64D 27/10 (2006.01); F02C 6/04 (2006.01); F02C 7/143 (2006.01)
CPC F28F 27/02 (2013.01) [F01D 25/12 (2013.01); F02C 6/08 (2013.01); F02C 7/18 (2013.01); F02C 9/18 (2013.01); B64D 13/06 (2013.01); B64D 27/10 (2013.01); B64D 2013/0618 (2013.01); F02C 6/04 (2013.01); F02C 7/143 (2013.01); F05D 2270/112 (2013.01); F05D 2270/303 (2013.01); F05D 2270/44 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A regulator system for regulating a temperature associated with a heat exchanger assembly of a turbine engine, the regulator system including a controlled valve, a heat exchanger having connected thereto as input a first pipe bleeding off a first air stream under pressure downstream from a compression stage of the turbine engine, and a second pipe bleeding off via the controlled valve a second air stream formed by air bled off downstream from a fan of the turbine engine, the temperature of the second air stream at the inlet to the heat exchanger being less than the temperature of the first air stream at the inlet to the heat exchanger, the heat exchanger being suitable for lowering the temperature of the first air stream at an outlet from the heat exchanger by exchanging heat with the second air stream, and said valve including a shutter that can be controlled electrically by a control unit to vary the flow rate of an air stream passing through said heat exchanger assembly in order to influence said temperature;
the system being characterized in that the control unit for the valve comprises:
a temperature sensor for measuring the temperature of the first air stream at the outlet from the heat exchanger;
an estimator module for estimating a theoretical temperature for the first air stream at the outlet from the heat exchanger as a function, amongst others, of an estimate of the position of the shutter of the valve;
a first subtracter configured to calculate a first temperature difference between the measured temperature and the estimated theoretical temperature;
a correction module configured to use the first calculated temperature difference to determine a correction current for correcting a control current from the control unit for the valve;
a second subtracter configured to calculate a second temperature difference between the measured temperature and a setpoint temperature for the first air stream at the outlet from the heat exchanger; and
a control means configured to use the second temperature difference to deliver a control current for controlling the shutter of the valve while taking account of the correcting current;
the estimator module including a determination module for determining the position of the shutter of the valve from the control current and from the correction current.