压力容器
壓力容器
압력용기
2014年
5期
46-50
,共5页
百叶窗%对流换热%传热强化
百葉窗%對流換熱%傳熱彊化
백협창%대류환열%전열강화
louvered fins%convective heat tranfer%heat transfer enhance
百叶窗翅片广泛应用在紧凑式换热器中,基于传统矩形百叶窗结构,提出两种新型矩/梭形百叶窗翅片,利用FLUENT软件对不同结构的百叶窗翅片流场、温度场进行模拟分析,对比不同结构百叶窗翅片的传热和阻力特性。研究表明,由于流道变截面的影响,使得梭形百叶窗和矩/梭形百叶窗有较高流速的流体冲刷加热管壁面,从而梭形百叶窗和矩/梭形百叶窗传热效果增强,其综合性能均优于矩形百叶窗,矩/梭(2/1)形百叶窗传热j因子相对较高,综合性能较好。
百葉窗翅片廣汎應用在緊湊式換熱器中,基于傳統矩形百葉窗結構,提齣兩種新型矩/梭形百葉窗翅片,利用FLUENT軟件對不同結構的百葉窗翅片流場、溫度場進行模擬分析,對比不同結構百葉窗翅片的傳熱和阻力特性。研究錶明,由于流道變截麵的影響,使得梭形百葉窗和矩/梭形百葉窗有較高流速的流體遲刷加熱管壁麵,從而梭形百葉窗和矩/梭形百葉窗傳熱效果增彊,其綜閤性能均優于矩形百葉窗,矩/梭(2/1)形百葉窗傳熱j因子相對較高,綜閤性能較好。
백협창시편엄범응용재긴주식환열기중,기우전통구형백협창결구,제출량충신형구/사형백협창시편,이용FLUENT연건대불동결구적백협창시편류장、온도장진행모의분석,대비불동결구백협창시편적전열화조력특성。연구표명,유우류도변절면적영향,사득사형백협창화구/사형백협창유교고류속적류체충쇄가열관벽면,종이사형백협창화구/사형백협창전열효과증강,기종합성능균우우구형백협창,구/사(2/1)형백협창전열j인자상대교고,종합성능교호。
Louvered fins are widely used in compact heat exchangers.Two kinds of louvers were proposed based the traditional rectangle louver.The flow field and thermal field of louvered fins are simulated by sofeware FLUENT.The characteristics of heat transfer and resistance are compared to different kinds of louvers.Due to the changed flow sections,the spindle louver and rectangle/spindle louver have higher flow velocity near the heated tube wall,the heat transfer is enhanced and comprehensive performance is better than reactangle louver.The j factor of rectangule/spindle (2/1 )louver is highest and the compre-hensive performance is best.