交叉式多股流板翅式换热器数值研究  

Numerical study on cross-type multi-stream plate-fin heat exchanger

作　　者：李俊[1] 蒋彦龙[1] 周年勇[1] 徐雷[1] 施红[1] 郑文远[2] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016 [2]中国航空工业集团公司中航工业金城南京机电液压工程研究中心航空机电系统综合航空科技重点实验室,南京210016

出　　处：《航空动力学报》2016年第5期1087-1096,共10页Journal of Aerospace Power

基　　金：江苏高校优势学科建设工程资助项目

摘　　要：借鉴顺逆式板翅式换热器研究成果,分析了交叉式多股流板翅式换热器传热机理,建立了基于有限容积法的多股流板翅式换热器传热数学模型,经过合理假设将翅片间距与单元格尺寸独立,拓展了前人数学模型适用范围.同时,以机载交叉式3股流板翅式换热器为例,对单元格尺寸选取进行了探讨,对同一通道单元格内流体流动横向传热进行了分析,证明了忽略流动横向传热的可行性,从而在保证精度不变条件下提高了计算效率;并在流体变入口参数条件下进行试验,对数值计算方法进行验证,通过与试验数据对比,理论计算误差小于7.9%,证明了数值计算方法的合理性.Heat transfer mechanism of cross-type multi-stream plate-fin heat exchanger （MPFHE） was analyzed and the mathematical model by finite volume method was estab- lished based on the research of parallel-counter type MPFHE, and then the distance between fins was separated with cell size by reasonable assumption, mer mathematical model. Besides, discussion about choice airborne cross-type three-stream plate-fin heat exchanger;heat transfer of flow within a cell on the same channel was expanding of cell size while the applied to the application of for- was conducted for the analysis of transverse demonstrate the possi-bility of ignoring the transverse heat transfer in this direction, so as to increase calculation efficiency under the constant computational accuracy;moreover, experiment of different inlet flow rates or temperatures was carried out to verify the veracity of numerical method. The calculation uncertainty is less than 7.9% compared with the test record, thus proving the ra-tionality of numerical method.

关 键 词：板翅式换热器 交叉式多股流 有限容积法 数值计算 试验验证 

分 类 号：V241.0[航空宇航科学与技术—飞行器设计]