热力发电
熱力髮電
열력발전
THERMAL POWER GENERATION
2014年
8期
89-93,97
,共6页
换热器%矩形偏心翅片%椭圆管%数值模拟%波纹倾角%综合换热性能
換熱器%矩形偏心翅片%橢圓管%數值模擬%波紋傾角%綜閤換熱性能
환열기%구형편심시편%타원관%수치모의%파문경각%종합환열성능
heat exchanger%rectangular eccentric corrugated fin%oval tube%numerical simulation%corruga-tion%comprehensive heat transfer performance
采用Fluent软件，在进口空气流速v＝0．5~4．0 m/s下，对不同波纹倾角(θ＝0°、θ＝5°、θ＝10°、θ＝15°、θ＝18°)的矩形偏心波纹翅片椭圆管换热器翅片间的流动与换热规律进行了三维数值模拟，分析了不同雷诺数Re和波纹倾角θ对矩形偏心波纹翅片椭圆管换热器的翅片表面平均努塞尔数Nu、压差损失Δp以及翅片管综合换热性能因子j/f的影响.研究结果表明：矩形偏心平直翅片椭圆管的综合换热性能最佳；适当增加翅片前端迎风侧波纹倾角，减小翅片后部区域波纹倾角，可同时起到增强换热、减少阻力损失的双重作用.
採用Fluent軟件，在進口空氣流速v＝0．5~4．0 m/s下，對不同波紋傾角(θ＝0°、θ＝5°、θ＝10°、θ＝15°、θ＝18°)的矩形偏心波紋翅片橢圓管換熱器翅片間的流動與換熱規律進行瞭三維數值模擬，分析瞭不同雷諾數Re和波紋傾角θ對矩形偏心波紋翅片橢圓管換熱器的翅片錶麵平均努塞爾數Nu、壓差損失Δp以及翅片管綜閤換熱性能因子j/f的影響.研究結果錶明：矩形偏心平直翅片橢圓管的綜閤換熱性能最佳；適噹增加翅片前耑迎風側波紋傾角，減小翅片後部區域波紋傾角，可同時起到增彊換熱、減少阻力損失的雙重作用.
채용Fluent연건，재진구공기류속v＝0．5~4．0 m/s하，대불동파문경각(θ＝0°、θ＝5°、θ＝10°、θ＝15°、θ＝18°)적구형편심파문시편타원관환열기시편간적류동여환열규률진행료삼유수치모의，분석료불동뢰낙수Re화파문경각θ대구형편심파문시편타원관환열기적시편표면평균노새이수Nu、압차손실Δp이급시편관종합환열성능인자j/f적영향.연구결과표명：구형편심평직시편타원관적종합환열성능최가；괄당증가시편전단영풍측파문경각，감소시편후부구역파문경각，가동시기도증강환열、감소조력손실적쌍중작용.
Three dimensional numerical simulation on heat and mass transfer of rectangular eccentric corru-gated fin-and-oval tube heat exchangers with different corrugated inclination angles (θ=0°,θ=5°,θ=10°,θ=15°,θ=18°)and inlet air velocities (from 0.5 m/s to 4.0 m/s)was performed by the FLUENT soft-ware.The effects Reynolds number (Re)and corrugated inclination angle (θ)on average Nusselt number (Nu)of the rectangular eccentric corrugated fin-and-oval tube heat exchanger surface,differential pressure lossΔP and finned tube heat transfer performance influence factor j/f were analyzed.The results show that:the comprehensive heat transfer performance of the rectangular eccentric plate-fin-and-oval tube heat exchanger is the best;properly increasing the front windward corrugated inclination angle and reducing the rear area corrugated inclination angle of the corrugated fin can enhance the heat transfer and reduce the re-sistance loss at the same time.
