Air side thermal performance of wavy fin heat exchangers produced by selective laser melting

7th European Thermal-Sciences Conference

Kuehndel, J.^1,2 ; Kerler, B.^1 ; Karcher, C.^2

Mahle Industrial Thermal Systems, Heilbronner Straße 380, Stuttgart

70469, Germany^1

Institute of Thermodynamics and Fluid Mechanics, Technische Universitat Ilmenau, PO Box 100565, Ilmenau

98684, Germany^2

关键词: Air sides;    Dust resistance;    Experimental correlation;    High dimensional accuracy;    Rapid prototyping techniques;    Selective laser melting;    Thermal Performance;    Water flow rate;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/745/3/032057/pdf
DOI  :  10.1088/1742-6596/745/3/032057

来源: IOP

【 摘 要 】

Wavy fins are widely used for off-road vehicle coolers, due to their dust resistance. In this study, heat exchanger elements with wavy fins were examined in an experimental study. Due to independence of tooling and degrees of freedom in design, rapid prototyping technique selective laser melting was used to produce heat exchanger elements with high dimensional accuracy. Tests were conducted for air side Reynolds number Re of 1400-7400 varying wavy amplitude and wave length at a constant water flow rate of 9.0m3/h inside the tubes. The effects of wavy amplitude and wave length on the air side thermal performance were studied. Experimental correlation equations for Nu and were derived by regression analysis.