一次表面回热器瞬态响应特性的数值分析  

Numerical Analysis of Transient Response Characteristics of Primary Surface Recuperators

作　　者：王斌[1] 程惠尔[1] 王平阳[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030

出　　处：《动力工程》2005年第5期656-662,共7页Power Engineering

基　　金：国家重点基础研究发展规划基金项目(G19999022303);海装十五预先研究项目(No.401010301)

摘　　要：基于能量守恒原理,根据一次表面回热器(PSR)的结构、流动特点,导出它的瞬态温度变化物理模型和数学方程式。研究温度和流量发生阶跃变化时PSR的响应特性,还分析了PSR波纹板片的数目n、波纹板片的长度L、宽度W和厚度等各几何参数以及波纹通道的形状对温度响应时间的影响。比较研究表明,由于PSR的固体壁面时间常数远小于板翅式和管壳式换热器。因此,这种轻重结构的换热器响应特性明显优于常规热交换器,非常适用于那些要求机动多变、灵敏反应的舰船燃气轮机或车用内燃机等动力装置。Based on the laws of conservation of energy, a physical model and the corresponding mathematical equations for the transient temperature of a primary surface recuperator （PSR） has been derived , in accordance with its structural particulars and flow pattern. A PSR＇ s response to step changes of temperature and mass flow were studied. Also taken as an object of study were the effect of geometric parameters of the corrugated plates of the recuperator, such as their number n, length L, width W and thickness 9 and also that of the shape of the flow channels. A comparison of the results shows that the light-weighted PSR is superior, in respect to transient responses , traditional heat exchangers, because the time constant of the PSR＇ s solid walls is much less than that of plate-fin and pipe-shell heat exchangers and therefore makes it very fit for power equipments, like marine gas turbine sets or vehicle installed internal-combustion engines, that have to work under frequently changing conditions. Figs 9, tables 3 and refs 12.

关 键 词：动力机械工程 传热 一次表面回热器 瞬态响应特性 数学模型 数值分析 

分 类 号：TK479.11[动力工程及工程热物理—动力机械及工程]