Improvement on Main/backup Controller Switching Device of the Nozzle Throat Area Control System for a Turbofan Aero Engine
-
Jie Li
,
Minghu Duan
Abstract
A full authority digital electronic controller (FADEC) equipped with a full authority hydro-mechanical backup controller (FAHMBC) is adopted as the nozzle throat area control system (NTACS) of a turbofan aero engine. In order to ensure the switching reliability of the main/backup controller, the nozzle throat area control switching valve was improved from three-way convex desktop slide valve to six-way convex desktop slide valve. Simulation results show that, if malfunctions of FAEDC occur and abnormal signals are outputted from FADEC, NTACS will be seriously influenced by the main/backup controller switching in several working states, while NTACS will not be influenced by using the improved nozzle throat area control switching valve, thus the controller switching process will become safer and smoother and the working reliability of this turbofan aero engine is improved by the controller switching device improvement.
©2014 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Frontmatter
- Analysis on Impulse Characteristics of PDRE with Exhaust Measurements
- Scramjet Propulsive Flowpath Design and Numerical Simulation
- Base Pressure Control with Annular Ribs
- Weighted Fuzzy Risk Priority Number Evaluation of Turbine and Compressor Blades Considering Failure Mode Correlations
- Effect of Compressibility on Contrail Ice Particle Growth in an Engine Jet
- Characteristics of Co-flow Jets from Orifices
- Experimental Investigation of the Loss Coefficients in a Linear Cascade
- Application of the Ultrasonic Oil Film Thickness Measurement System in Bearing Chambers
- Fatigue Lifetime Assessment of Aircraft Engine Disc via Multi-source Information Fusion
- Improvement on Main/backup Controller Switching Device of the Nozzle Throat Area Control System for a Turbofan Aero Engine
- Numerical and Experimental Investigation of Cavitating Characteristics in Centrifugal Pump with Gap Impeller
Articles in the same Issue
- Frontmatter
- Analysis on Impulse Characteristics of PDRE with Exhaust Measurements
- Scramjet Propulsive Flowpath Design and Numerical Simulation
- Base Pressure Control with Annular Ribs
- Weighted Fuzzy Risk Priority Number Evaluation of Turbine and Compressor Blades Considering Failure Mode Correlations
- Effect of Compressibility on Contrail Ice Particle Growth in an Engine Jet
- Characteristics of Co-flow Jets from Orifices
- Experimental Investigation of the Loss Coefficients in a Linear Cascade
- Application of the Ultrasonic Oil Film Thickness Measurement System in Bearing Chambers
- Fatigue Lifetime Assessment of Aircraft Engine Disc via Multi-source Information Fusion
- Improvement on Main/backup Controller Switching Device of the Nozzle Throat Area Control System for a Turbofan Aero Engine
- Numerical and Experimental Investigation of Cavitating Characteristics in Centrifugal Pump with Gap Impeller
