CAJ | 학술논문

分析了高空台加温试验时管网内部流动的动态换热特性，建立了管内气体和管壁的联合换热方程，在与试验数据对比的基础上提出了数学模型的修正方法，对试验中管网出15温升过程进行了计算，取得了较好效果。计算结果分析表明：局部热损失在管网散热过程中的比重较大，为缩短试验准备时间，应对混和器出口温度进行分段控制。
분석료고공태가온시험시관망내부류동적동태환열특성，건립료관내기체화관벽적연합환열방정，재여시험수거대비적기출상제출료수학모형적수정방법，대시험중관망출15온승과정진행료계산，취득료교호효과。계산결과분석표명：국부열손실재관망산열과정중적비중교대，위축단시험준비시간，응대혼화기출구온도진행분단공제。
Unsteady heat transfer characteristics in pipes of altitude test facility are analyzed, and equa- tions of heat transfer between hot air and walls are developed. Moreover, correction method of calculation re-sults is offered on the basis of test data comparison. Outlet temperature raising processes at two test condi- tions are well predicted by using the method. The results show that local heat loss plays a very important role in the process of pipe network＇ s heat losing; the temperature of blender outlet should be controlled dif- ferently in different periods to reduce test preparation time.