摘要
建立了叉流式热交换器在热流体和冷流体都随时间变化的条件下的动态二维数学模型。使用一阶精度显式格式建立了热交换器的有限差分模型。该模型能够满足任意变化的温度及流量入口条件。经过实例计算表明,所得的理论热交换器出口平均温度变化曲线与相应的空中试飞测试曲线有较好的跟随性、吻合程度良好。
The dynamic mathematical model of cross-flow heat exchangers is established in this paper,which takes into account of the arbitrary variations of temperature and flowrate inlets.A numerical method of the finite-difference is applied to solve the governing differential equations.The theoretical results have good agreement with the flight test data.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
1992年第4期120-126,共7页
Journal of Beijing University of Aeronautics and Astronautics
关键词
动态特性
数字模型
换热器
heat exchanger,dynamic characteristics,mathematical model
