新型三角孔翅片的对流传热及压降特性  

Convective heat transfer and pressure drop of new triangular perforated fin

作　　者：李娟[1] 凌祥[1] 彭浩[1] 

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2012年第4期27-32,共6页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：教育部新世纪优秀人才支持计划资助项目(NCET-07-0434);教育部高等学校博士学科点专项科研基金资助项目(20103221110005);江苏省科技成果转化专项资金资助项目(BA2009021);江苏省科技支撑计划资助项目(BE2008005)

摘　　要：为了充分利用边界层的起始段效应,以达到强化传热的目的,提出一种新型横排三角形多孔翅片。运用计算流体力学(CFD)软件对翅片热力性能进行了数值计算,与相关试验结果进行对比,验证数值分析的有效性与准确性。在此基础上,分析不同的开孔率以及孔错开间距等因素对新型多孔翅片热力性能的影响。结果表明:较大开孔率翅片总体传热特性优于较小开孔率翅片;孔错开间距为1/2单元宽度的翅片具有较大的传热品质因子,传热性能更好。最后,通过与锯齿翅片传热品质因子j/f^(1/3)进行比较得出,三角孔翅片具有较优越的传热性能。To make full use of boundary-layer effect to improve heat transfer efficiency, a new triangular perforated fin was presented. 3D numerical simulation on thermal performance of different convective heat transfer fins was carried out by using computational fluid dynamics （CFD） software. Compared with the re- lated experimental data, the validation of CFD model was verified . The effects of hole opening rates and hole stagger spaces on heat transfer and pressure drop characteristics were analyzed. Results showed that the fin with larger opening rate had better heat transfer characteristic than that with the smaller one, and the fin with hole stagger space of 1/2 unit width had better heat transfer performance. The triangular perforated fins had superior heat transfer performance compared with serrated fin on heat transfer quality factor j/f1/3.

关 键 词：三角孔翅片 强化传热 开孔率 孔错开间距 

分 类 号：TK172[动力工程及工程热物理—热能工程]