飞机机载综合热管理系统稳态仿真

Numerical simulation of aircraft integrated thermal management system in steady working condition

建立机载综合热管理系统的稳态仿真数学模型,在MATLAB软件平台上搭建仿真模块,针对同一高度不同飞行速度以及同一马赫数不同高度进行系统稳态仿真,得到系统中关键部件的进出口温度和流量,并分析了马赫数以及高度对各状态点温度的影响.分析得出,飞机在同一高度、亚音速区以不同的马赫数飞行时,在燃油子系统中,除个别状态点外,其它各点的温度都随马赫数的增加而增加;在空气循环子系统中,各状态点的温度随马赫数的增加而先减后增.飞机以同一马赫数在不同高度飞行时,在燃油子系统中,除个别状态点外,其它各点的温度都随飞行高度的增加而减小;在空气循环子系统中,各状态点的温度都随飞行高度的增加而减小.

Steady simulation model of aircraft integrated thermal management system was established and simulation blocks were constructed on the platform of MATLAB software. Simulation was conducted for the system for different Mach numbers and different altitudes. The outlet temperature and flow flux of key components in the system were then obtained. Influences of Mach number and altitudes on temperature of each state point were analyzed. The results indicate that in the fuel subsystem, except one state point, temperature of other state point increases with the increasing of Mach number at the same altitude in different subsonic Mach number; In the subsystem of air cycle, temperature in all state points decreases and then increases with the increasing of Mach number. The results also indicate that in the fuel subsystem, except one state point, temperature of other state points decreases with the increasing altitude in the same Mach number; In the subsystem of air cycle, temperature in all state points decreases with the increasing altitude.