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Acta Aeronautica et Astronautica Sinica ›› 2026, Vol. 47 ›› Issue (13): 533104.doi: 10.7527/S1000-6893.2026.33104

• Special Issue: Flow Control and Thermal Management • Previous Articles    

Analysis on delay characteristics of response modes of aircraft internal circulation fuel thermal management system

Haotian TAN1, Lei NING2, Jiangtao XU1(), Hongqing LYU1, Linhai ZHU3, Jitao WU1   

  1. 1.College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150001,China
    2.Shanghai Aerospace Control Technology Institute,Shanghai 201109,China
    3.Mechanical and Electrical Systems Department,AVIC Shenyang Aircraft Design & Research Institute,Shenyang 110035,China
  • Received:2025-11-18 Revised:2025-12-19 Accepted:2026-01-28 Online:2026-02-10 Published:2026-02-09
  • Contact: Jiangtao XU E-mail:hit_xjt@163.com

Abstract:

Introducing an internal circulation loop boosts aircraft Thermal Management System (TMS) heat sink efficiency. However, it creates complex dynamics with flow-dependent response delays. TMS couples thermodynamic and fluid dynamic processes, featuring numerous interconnected nodes that exhibit high heterogeneity and complexity. Conventional modeling fails to capture these dynamics or analyze delay causes, hindering control design. This paper proposes a hierarchical (hydraulic-thermal) graph-based modeling method for internal loop TMS dynamics. It reveals delay mechanisms and quantifies delay zones across flow states. The results show that the fundamental cause of the delay effect is that the internal circulation alters the topological structure of system dynamics and adds positive feedback terms, and the larger the flow rate of the internal circulation, the slower the system response speed.

Key words: thermal management system, internal circulation, graph theory, network dynamic, modal analysis

CLC Number: