CH Recently, the Chinese Society of Aeronautical Engineering announced the review results for the 2025 "Engineering Model Dissertations." Dr. Kailong Xia’s doctoral dissertation, titled Research on the Effects of Non-Axisymmetric Clearance on the Aerodynamic and Aeroelastic Stability of Axial Flow Compressors, was successfully selected as a Doctoral Model Dissertation. The dissertation advisor is Chief Researcher Jinfang Teng.
The "Engineering Model Dissertations" selection by the Chinese Society of Aeronautical Engineering aims to advance the progress and innovative development of aviation science and technology, encourage graduate students to produce high-level academic achievements addressing major engineering challenges in the aviation field, and promote the cultivation of top-tier innovative young talent in aviation. The selection is held annually, with no more than ten doctoral and ten master's model dissertations chosen each year.
In 2025, a total of 48 dissertation submissions from over ten universities and research institutes were received. After formal review, committee evaluation, and deliberation and voting by the standing council, five doctoral dissertations and ten master's dissertations were ultimately selected. The five selected doctoral dissertations came from Nanjing University of Aeronautics and Astronautics, Harbin Institute of Technology, Beihang University, Northwestern Polytechnical University, and Shanghai Jiao Tong University.
List of Selected Doctoral Model Dissertations
Introduction to the Award-Winning Dissertation
Addressing the engineering demands for aerodynamic stability assessment of domestically developed civil turbofan engines, this dissertation comprehensively employed experimental measurements, full-annulus unsteady numerical simulations, and aeroelastic analysis methods, yielding multiple innovative achievements: An experimental design method that uses non-uniform blade heights to equivalently represent casing ellipticity deformation was proposed, offering a low-cost and scalable practical approach for experiments involving complex clearance configurations. A "counterintuitive" phenomenon was discovered where elliptical clearance can enhance the stall margin in low-speed compressors, and its flow mechanism was revealed. A circumferential propagation model for stall cells under non-axisymmetric elliptical clearance conditions was established, quantitatively explaining the effect of elliptical clearance on the stall margin of transonic compressors. A hierarchical aeroelastic analysis procedure of "single-passage traveling wave + multi-passage influence coefficient + full-annulus traveling wave" was proposed, filling a gap in rapid assessment methods for aeroelastic stability under non-axisymmetric clearance conditions. These achievements have been applied to the compressor stability assessment of a certain type of civil turbofan engine, providing strong support for the stability design and airworthiness analysis of domestically produced aero-engines.
SJTU-LSRC test rig and the measurement scheme for the dynamic pressure on the rotor blade tip casing wall surface
Generation and circumferential propagation evolution process of the blade tip stall cell induced by non-uniform clearance
Generation and circumferential propagation evolution process of the blade tip stall cell induced by non-uniform clearance
About the Author
Dr. Kailong Xia received his Ph.D. in Engineering from the School of Aeronautics and Astronautics at Shanghai Jiao Tong University in March 2025. That same month, he joined the school's AI + Aero-Engine Turbomachinery Aerodynamics and Heat Transfer team for postdoctoral research, under the supervision of Chief Researcher Jinfang Teng. In recent years, he has published nearly 20 papers in leading journals in the field, such as ASME Journal of Turbomachinery, Aerospace Science and Technology, and Physics of Fluids, including ten as first or corresponding author. He has received honors including the National Scholarship for Doctoral Students, the Shanghai Jiao Tong University Outstanding Student Model (awarded to ten individuals annually), and the Shanghai Outstanding Graduate designation. He was selected for the 2025 Shanghai "Super Postdoctoral" Incentive Program and received the Excellent Paper Award at the 2025 Academic Annual Conference of the Chinese Society of Engineering Thermophysics.
About the Supervisor
Jinfang Teng is a Chief Researcher and Doctoral Supervisor at the School of Aeronautics and Astronautics, Shanghai Jiao Tong University. She is a member of the Turbomachinery Professional Committee of the Power Branch of the Chinese Society of Aeronautics and Astronautics, and the Chief Scientist of the Joint Innovation Center (UIC) for Commercial Aero-Engine Turbomachinery Aerodynamic and Heat Transfer Technology. Her research areas include AI + aero-engine turbomachinery aerodynamics and heat transfer, compressor stall mechanisms and flow control, and fluid-structure-thermal coupling calculations. She has authored four monographs, published over 100 papers, and applied for and been granted more than 30 national invention patents. She has received over ten national and provincial-level honors, including the "Heroine of Merit" award in the national defense science and technology industry and the Shanghai Education System Heroine Model award. The undergraduate course Principles of Propulsion, which she leads, has been recognized as a Shanghai Excellent Course.
Congratulations to Dr. Kailong Xia and the team of Professor Jinfang Teng!
The school will continue to encourage and support faculty and students in focusing on the major needs of the national aerospace propulsion field, engaging in dedicated research, striving for innovation, and producing more high-level achievements, thereby contributing the strength of SJTU to the development of China's aviation industry!