飞机内循环燃油热管理系统响应延迟效应

doi:10.7527/S1000-6893.2026.33104

Abstract

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:

V228

Haotian TAN, Lei NING, Jiangtao XU, Hongqing LYU, Linhai ZHU, Jitao WU. Analysis on delay characteristics of response modes of aircraft internal circulation fuel thermal management system[J]. Acta Aeronautica et Astronautica Sinica, 2026, 47(13): 533104.

Figures/Tables 25

Fig.1

Fig.2

Fig.3

Table 1

Flight condition point parameters

变量名称	符号	数值
飞行高度/km		2.61
飞行马赫数	Ma	0.33
发动机耗油率/（kg·s^-1）	$m ˙ e$	0.30
热载荷/kW	$ϕ$	150.00

Table 1

Table 2

Fig.4

Fig.5

Table 3

Control quantities and simulation state parameters in non-internal circulation state

变量名称	符号	数值
散热泵转速/（r·min^-1）	n_t	1 508.88
回油阀门开度	v_b	0.45
供油泵转速/（r·min^-1）	n_s	3 210.81
散热流量/（kg·s^-1）	$m ˙ 3$	1.60
回油流量/（kg·s^-1）	$m ˙ 0$	1.50
发动机入口压力/kPa	P₂	150.00

Table 3

Table 4

Control quantities and simulation state parameters in internal circulation state

变量名称	符号	数值
散热泵转速/（r·min^-1）	n_t	5 419.88
回油阀门开度	v_b	0.02
供油泵转速/（r·min^-1）	n_s	3 116.12
散热流量/（kg·s^-1）	$m ˙ 3$	4.20
回油流量/（kg·s^-1）	$m ˙ 0$	0.50
发动机入口压力/kPa	P₂	150.00

Table 4

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Fig.11

Fig.12

Fig.13

Fig.14

Fig.15

Fig.16

Fig.17

Fig.18

Table 5

Fig.19

Fig.20

References 21

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变量名称	符号	数值
供油箱容积/m³	V₀	12.78
供油泵出口管路容积/m³	V₁	0.005
发动机入口容积/m³	V₂	0.005
冷板燃油容积/m³	V₃	0.005
换热器出口管路容积/m³	V₄	0.005
冷板质量/kg	M_w	6

非内循环状态极点	内循环状态极点
-2.987 5×10^-5	-2.988 4×10^-5
-0.076 5	-0.038 6
-0.155 4	-0.938 0+0.661 8i
-0.459 7	-0.938 0-0.661 8i
-0.407 4	-1.550 9

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

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