[1]文 键,厉彦忠,周爱民,等.板翅式换热器封头内部流场的测量与改进研究[J].西安交通大学学报,2006,40(01):010-0013.[doi:10.7652/xjtuxb200601003]
 Wen J ian,Li Yanzhong,Zhou Aimin,et al.Particle Image Velocimetry Experimental Investigation of Header Conf iguration on FlowMaldistribution in Plate2Fin Heat Exchanger[J].Journal of Xi'an Jiaotong University,2006,40(01):010-0013.[doi:10.7652/xjtuxb200601003]
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板翅式换热器封头内部流场的测量与改进研究
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《西安交通大学学报》[ISSN:0253-987X/CN:61-1069/T]

卷:
40
期数:
2006年第01期
页码:
010-0013
栏目:
出版日期:
2006-01-10

文章信息/Info

Title:
Particle Image Velocimetry Experimental Investigation of Header Conf iguration on FlowMaldistribution in Plate2Fin Heat Exchanger
作者:
文 键 厉彦忠 周爱民 张 科 王 江
西安交通大学能源与动力工程学院, 710049 , 西安)
Author(s):
Wen J ian Li Yanzhong Zhou Aimin Zhang Ke Wang J iang
School of Energy and Power Engineering , Xi′an Jiaotong University , Xi′an 710049 , China)
关键词:
板翅式换热器粒子图像测速仪封头结构
DOI:
10.7652/xjtuxb200601003
摘要:
利用粒子图像测速仪(PIV) ,对板翅式换热器封头结构改进前、后的流场进行了可视化研究分析. 实验结果表明,原始封头内部的物流分配存在严重的不均匀性,采用添加打孔挡板之后的改进型封头,流场的不均匀性有了很大的改善. 从实验对比分析中得出,当挡板小孔呈错排分布、开孔率沿挡板的中轴线向两侧逐渐增加、且总开孔率达到50 %左右的时候,在相同的入口条件下,不均匀系数由原始封头的11210 降至01209 ,最大流速与最小流速之比由231163 降至11756. 此研究结果对于板翅式换热器的优化设计具有重要意义.
Abstract:
characteristics of flow field in t he header of a plate2fin heat exchanger were inves2 tigated wit h particle image velocimet ry ( PIV) . It is found t hat the fluid flow maldist ribution is very serious for conventional header while t he improved header configuration wit h p unched baffle can effectively imp rove the performance. When the p unched baffle is proper in lengt h , the small holes are in staggered arrangement and t he p unched ratio gradually increases f rom t he cent ral axis to the boundary along t he baffle lengt h , t he performance of flow dist ribution in t he plate2fin heat exchanger is effectively improved by t he optimum design of header configuration. The flow mald2 ist ribution parameter S decreases f rom 11210 to 01209 and t he ratio of the maximum velocity to
t he minimum decreases f rom 231163 to 11756.

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