热力发电Issue(2)：31-35,5.DOI:10.3969/j.issn.1002﹣3364.2015.02.031
缩放椭圆管结垢对换热场协同的影响
Effect of fouling on heat transfer field synergy in alternating elliptical axis tubes
摘要
Abstract
Numerical simulation on circle tube and alternating elliptical axis tube with fouling thickness of 0.5 mm,1.0 mm,1.5 mm and 2.0 mm was carried out to analyze the effects of fouling on velocity field, temperature field,synergy angle and and synergy number,under conditions with Renolds number of 10 000,12 000,18 000,24 000 and 30 000.Moreover,comparative analysis on circular tube and alternating elliptical axis tube was performed.The results indicate that,in the alternating elliptical axis tube,the field synergy number decreases with the increasing Reynolds number while increases with the fouling thickness. The average synergy angle has the opposite changes.Along the tube length,the field synergy number de﹣creases gradually,it has two maximum peaks and two minimum peaks within each transition section.The alternating elliptical axis tube has greater mean﹣field synergy number but smaller average synergy angle than the circle tube.关键词
缩放椭圆管/速度场/温度场/场协同数/协同角/污垢厚度Key words
alternating elliptical axis tube/velocity field/temperature field/field synergy number/synergy angle/fouling thickness分类
能源科技引用本文复制引用
张艾萍,王新灵,张宏学..缩放椭圆管结垢对换热场协同的影响[J].热力发电,2015,(2):31-35,5.基金项目
国家自然科学基金项目(51076025) （51076025）
东北电力大学博士科研启动基金项目(BSJXM﹣201207) （BSJXM﹣201207）
