摘要
大功率的航空机载电子设备会存在超温问题,相比于风冷,采用液冷源对设备进行冷却具有更好的散热效果,因此需要对液冷源系统进行热特性仿真计算。以某型机载液冷源为例,建立其主要部件(包括储液箱、齿轮泵、散热器等)的传热理论数值计算模型,仿真分析-40~40℃温度工况下的系统热特性,并通过状态机编程实现超温情况下的温控仿真。结果表明:该型机载液冷源系统在典型工况下温度指标基本满足冷板进口温度(5~30℃)的技术指标要求;在系统温度上下偏值较大的情况下,采取提高风机转速或打开冲压空气口的控制方法,可明显改善该问题且冷板温度基本控制在5~15℃范围内。
High-power aviation airborne electronic equipment will have the problem of over-temperature.Compared with air cooling,the use of the liquid cooling to cool the device has better heat dissipation effect,so the thermal characteristics of the liquid cooling system need to be simulated and calculated.Taking a certain type of airborne liquid cooling as an example,the theoretical calculation model of heat transfer of the main components(such as liquid storage tank,gear pump,radiator,etc.)is established,and the temperature under -40~40℃ is simulated and analyzed.The thermal characteristics of the system and through the state machine programming to achieve temperature control simulation under over-temperature conditions.The results show that the temperature index of this type of airborne liquid cooling system basically meets the technical index requirements of the cold plate inlet temperature(5~30℃)under typical working conditions;The method of increasing fan speed or the control method of opening the ram air port can obviously improve the problem and the cold plate temperature is basically controlled in the range of 5~15℃.
作者
董章志
李小刚
陆继翔
DONG Zhangzhi;LI Xiaogang;LU Jixiang(College of Aeronautics Engineering,Air Force Engineering University,Xi’an 710051,China;School of Mechanical-electronic Engineering,Northwestern Polytechnical University,Xi’an 710072,China)
出处
《航空工程进展》
CSCD
2021年第2期163-170,共8页
Advances in Aeronautical Science and Engineering
基金
陕西省重点研发项目(2020GY-225)。
关键词
机载液冷源系统
传热理论
热特性仿真
温度控制
airborne liquid cooling system
the heat transfer theory
thermal simulation
thermal control
