Session: 05-03 Hydrogen-fueled gas turbines

Paper Number: 124875

124875 - A Speed Control Method for Hydrogen-Fueled Turbojet Using Improved Internal Model Control 

Hydrogen energy is critical to the future decarbonisation of the aviation industry, and accurate metering of hydrogen fuel flow is crucial for the reliable and stable operation of aircraft propulsion systems. Compared to traditional liquid fuel metering, the compressibility of hydrogen fuel makes its mass flow rate susceptible to pressure and temperature fluctuations. On the other hand, since hydrogen fuel cannot be metered as accurately as traditional fuel systems, it can only be estimated indirectly by parameters such as fuel valve opening, pressure and fuel temperature, which usually leads to large metering errors, thus triggering hydrogen engine performance oscillations or even accidents. Therefore, it is very important to maintain the good dynamic quality of parameters such as the rotational speed of an aero-engine despite the uncertainty of hydrogen fuel metering. In this paper, taking the gas-hydrogen-fueled engine J85-13 and its metering valve as the research object, a hydrogen-fueled engine speed control method based on the improved internal model control is proposed, which ensures the stability characteristics, dynamic response, and at the same time improves the disturbance rejection performance of the speed control method in the presence of uncertainty in the hydrogen fuel flow rate, and overcomes the drawbacks of the poor disturbance rejection performance of the traditional PI controller in this situation.

Presenting Author: Mengni Pan Tsinghua University

Presenting Author Biography: Pan Mengni received the B.S. degree in flight vehicle propulsion engineering from Northwestern Polytechnic University, Xian, China, in 2022. She is currently working toward the Ph.D. degree in aeronautical and astronautical science and technology with Institute for Aero Engine, Tsinghua University, Beijing, China. Her research interests include hydrogen engine control, hydrogen metering control and NOx emission control.

Authors:

Mengni Pan Tsinghua University
Ai He Tsinghua University
Zhixiong Chen AECC Hunan Aviation Powerplant Research Institute
Yuan Liu AECC Hunan Aviation Powerplant Research Institute
Zhongzhi Hu Tsinghua University