高压气体在膜式螺旋管环形通道中的对流换热特性  

Convective Heat Transfer Characteristics of High-Pressure Gas in Annular Channel Heat Exchanger with Membrane Spiral Tubes

作　　者：杨震[1] 赵振兴[1] 郭琴琴[2] 刘宏[1] 曹子栋[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]上海锅炉厂有限公司,上海200245

出　　处：《西安交通大学学报》2010年第11期17-22,共6页Journal of Xi'an Jiaotong University

基　　金：国家"863高技术"资助项目(2007AA05Z265)

摘　　要：在加压的条件下试验研究了膜式螺旋管环形通道内的对流换热特性,试验气体有单质气体He和N2,也有混合气体如He+N2,试验压力为0.5～3.5MPa,给出了不同螺旋管结构、不同气体和压力下的对流换热系数,以及典型冲刷形式的对流换热关联式及其适用条件.试验研究表明,气体压力、气体组分、冲刷形式对换热系数均有影响,特别是气体压力的影响最为突出.由数据分析得出了膜式螺旋管环形通道的对流换热关联式,该关联式可以适用于各种气体成分.Heat transfer in coal pressurized gasifier convection cooling section with the membrane spiral tubes under high pressure is experimentally investigated. High pressure single gas （He or Ne） and mixture gas（He＋N2） serve as the test media, and the test pressure for each gas varies from 0. 5 MPa to 3. 5 MPa. The results show that the gas composition, flow forms, especially the working pressure affect the high pressure gas convective heat transfer coefficient. The average convective heat transfer coefficients for different kinds of high pressure gas in annular channel heat exchanger, and the correlations of the typical flow forms and its applicable condition are sys- tematically obtained.

关 键 词：高压气体 膜式螺旋管 环形通道 对流换热 

分 类 号：TK172[动力工程及工程热物理—热能工程]