Session: 01-01/05-07 Joint Session: Aero-Engine Control & Diagnostics

Paper Number: 153081

Study on the Impact of Variable Geometry Turbines on the Overall Performance of Aeroengines and Their Control Principles 

Variable geometry turbine technology is of great significance for improving engine economy and stability. Currently, there is extensive research on the performance analysis during the process of adjusting the compressor inlet variable guide vanes. However, there is few research on the impact of variable geometry turbines on the engine operation process. How to adjust the variable geometry turbine guide vanes to make the engine operates in the optimal state requires further study.

This paper studies the impact of variable geometry low-pressure turbines on the overall performance of the engine. Through numerical simulation of turbine characteristics under different adjustable guide vane angles, the variable geometry turbine characteristic curves are obtained. Using a modular approach, the corresponding turbofan engine model is constructed. The constructed model is used to simulate the steady-state and dynamic operation processes of the engine under different turbine guide vane angles. By analyzing the changes of fuel consumption and thrust, the engine economic performance under different guide vane angles is studied. The stability and safety of the engine under different guide vane angles are studied by analyzing the changes of the surge margin and inlet temperature of the turbine. Finally, a control strategy for the adjustable guide vanes is designed to achieve multi-objective optimization of engine economy, stability, and safety. Additionally, to demonstrate designed strategy superiority , this control strategy is compared with traditional speed feedback control strategies and thrust feedforward control strategies.

The simulation of the steady-state and dynamic operation processes of a turbofan engine with a variable geometry low-pressure turbine achieve. The comparison of engine simulation results under different control strategies verifies the superiority of the designed strategy. Results indicate that the control strategy has reference significance for the control of adjustable guide vanes in actual engine turbines.

Presenting Author: Xin Ren Harbin Engineering University

Presenting Author Biography: Ren Xin, 23 years old.
Studied at Harbin Engineering University from 2019 to 2023, majoring in Gas Turbine, and obtained a bachelor’s degree.
From 2023 to the present, studying at Harbin Engineering University, engaged in research on the overall performance and control of gas turbines.

Authors:

Zhitao Wang Harbin Engineering University
Xin Ren Harbin Engineering University
Jingkai Zhang Harbin Engineering University
Xingwei Zhou Harbin Engineering University
Zijing Zheng Harbin Engineering University