低温冷屏蔽系统流场数值模拟研究  

Numerical Simulation on Unite Model of Cryogenic Cold Shield System

作　　者：张周卫[1,2] 陈光奇[2] 厉彦忠[1] 汪雅红 

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049 [2]兰州物理研究所低温分部,甘肃兰州730000 [3]兰州电源车辆研究所技术开发部,甘肃兰州730050

出　　处：《石油化工设备》2009年第1期14-21,共8页Petro-Chemical Equipment

基　　金：教育部高等学校博士学科点专项科研基金(20060698021)

摘　　要：提出一种以低温深冷剂相变制冷为原理的冷屏蔽系统技术,即通过深冷剂的相变制冷使物体表面温度降低从而降低红外辐射特性,进而建立三维立体模型并对模型进行单元流场及系统模型流场数值模拟。模拟结果表明,单元模型流场内温度分布梯度满足系统表面温度分布要求,流场参数变化幅度满足系统分层高度要求;系统模型流场参数分布满足变压出口条件,模型内流场参数保持稳定且变化幅度小;系统出口大小满足稳定状态下产生节流效应时所要求的出口大小;模型结构参数能够满足冷屏蔽系统原理要求。A technique about cold shield system with cryogenic phase change refrigeration was proposed,i, e. infrared radiation capability could be lowered by lowering the surface temperature through phase-change refrigeration of the cryogenic refrigerant, then a three-dimensional model and simulate on the unite model and systematic model about the flow field was established. The numerical simulation showed that the temperature of flow field in the unite model met the requirement of temperature distribution on systematic surface. The variation range of parameters in flow field met the requirement of layered height. The flow field parameters of systematic model met the condition of pressure change at outlet, and the systematic parameters kept stable and changed a little. The size of systematic outlet met the size when the throttling effect happened in steady state. The modeling structure met the theoretical requirement of cold shield system.

关 键 词：冷屏蔽系统 红外辐射 相变制冷 液氮 

分 类 号：TB661[一般工业技术—制冷工程]