化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2013年
8期
1765-1770
,共6页
数值模拟%翅片板式传热器%传热系数%双流道
數值模擬%翅片闆式傳熱器%傳熱繫數%雙流道
수치모의%시편판식전열기%전열계수%쌍류도
numerical simulation%fin plate heat exchanger%heat transfer coefficient%double channel
焊接型板式传热器的紧凑性好、质量轻、传热性能好、初始成本低等优越性已越来越被人们所认识,因此人们纷纷对板式传热器内流动状态和传热机理展开研究。鉴于此,本文运用数值模拟软件 Fluent 对全焊接翅片板式传热器双流道进行模拟,在此基础上又进行了实验研究及实验数据与数值模拟的对比分析,得出不同结构参数和操作参数下翅片的传热系数和压力降,并分析翅片高度和翅片间距对翅片传热性能与流动阻力的影响。结果表明:①固定冷侧的入口速度和温度,热侧的传热系数和压降随之热侧入口速度增加而增大;②板间距一定时,翅片高度并非越高传热性能越好;③翅片间距越小,传热性能越好。
銲接型闆式傳熱器的緊湊性好、質量輕、傳熱性能好、初始成本低等優越性已越來越被人們所認識,因此人們紛紛對闆式傳熱器內流動狀態和傳熱機理展開研究。鑒于此,本文運用數值模擬軟件 Fluent 對全銲接翅片闆式傳熱器雙流道進行模擬,在此基礎上又進行瞭實驗研究及實驗數據與數值模擬的對比分析,得齣不同結構參數和操作參數下翅片的傳熱繫數和壓力降,併分析翅片高度和翅片間距對翅片傳熱性能與流動阻力的影響。結果錶明:①固定冷側的入口速度和溫度,熱側的傳熱繫數和壓降隨之熱側入口速度增加而增大;②闆間距一定時,翅片高度併非越高傳熱性能越好;③翅片間距越小,傳熱性能越好。
한접형판식전열기적긴주성호、질량경、전열성능호、초시성본저등우월성이월래월피인문소인식,인차인문분분대판식전열기내류동상태화전열궤리전개연구。감우차,본문운용수치모의연건 Fluent 대전한접시편판식전열기쌍류도진행모의,재차기출상우진행료실험연구급실험수거여수치모의적대비분석,득출불동결구삼수화조작삼수하시편적전열계수화압력강,병분석시편고도화시편간거대시편전열성능여류동조력적영향。결과표명:①고정랭측적입구속도화온도,열측적전열계수화압강수지열측입구속도증가이증대;②판간거일정시,시편고도병비월고전열성능월호;③시편간거월소,전열성능월호。
Compacted size,light weight,good heat transfer performances,and low operating costs have made welded plate heat exchanger increasingly recognized in the industry. Fluid flow and heat transfer in plate heat exchangers have been widely studied. The numerical simulation of double channel’s flow field plate heat exchanger was presented in this paper using software. The fin heat transfer coefficient and pressure drop were obtained at different structural and operational parameters. The influences of fin height and fin spacing on heat transfer performance and flow resistance were also analyzed. The results showed the following:the velocity and temperature on the fixed cold side,heat transfer coefficient and pressure drop on the hot side increased with the hot side inlet velocity;at fixed plate spacing,the heat transfer performance was not in proportion with fin height;heat transfer performance was better at smaller fin spacing.