Experimental study on the forming of rectangle- & V-channels interconnected boiling enhancement structures
Experimental study on the forming of rectangle- & V-channels interconnected boiling enhancement structures
- Author(s): Chi Yong ; Tang Yong ; Chen Jinchang ; Deng Xuexiong ; Liu Lin ; Wan Zhenping ; Liu Xiaoqing
- DOI: 10.1049/cp:20060867
For access to this article, please select a purchase option:
Buy conference paper PDF
Buy Knowledge Pack
IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.
International Technology and Innovation Conference 2006 (ITIC 2006) — Recommend this title to your library
Thank you
Your recommendation has been sent to your librarian.
- Author(s): Chi Yong ; Tang Yong ; Chen Jinchang ; Deng Xuexiong ; Liu Lin ; Wan Zhenping ; Liu Xiaoqing Source: International Technology and Innovation Conference 2006 (ITIC 2006), 2006 p. 789 – 794
- Conference: International Technology and Innovation Conference 2006 (ITIC 2006)
- DOI: 10.1049/cp:20060867
- ISBN: 0 86341 696 9
- Location: Hangzhou, China
- Conference date: 6-7 Nov. 2006
- Format: PDF
In this paper, a rectangle- & V-channels interconnected boiling enhancement structure was manufactured by ploughing-extrusion and multi-tooth planing processes based on copper strips with 0.5 mm in thickness. The rectangle channels are 0.5 mm in width, 0.4 mm in depth and 1 mm in pitch. While in the opposite surface, the V-channels are 0.6 mm in depth, 40° in groove angle and 0.48 mm in pitch. These rectangle channels and V-channels are perpendicular and inter-connected. Wavy fins are at the fringe of V-channels. Micro pores are formed in the intersect site where theses two kinds of channels meet which are about 0.2 mm in length, 0.1 mm in width and have irregular fins around it. The final thickness of this structure is about 0.7 mm. The "pore-channel-fin" structures are advantageous for enhancing the nuclear boiling so can be widely used in thermosyphon, capillary pump loops, loop heat pipes and other two-phase heat transfer devices. The parameters of the employed ploughing-extrusion tool are: the major forming angle (γ0) is 30°, the minor forming angle (γ') is 20°, the edge inclination angle (Xγ) is 45°, the major extrusion angle (β) is 25°, and the minor extrusion (β') angle is 16°. Experiments show that the ploughing-extrusion depth has the greatest influence on the formation of micro pores. Only when the sum of the planing depth (Dp) and ploughing-extrusion depth (Dp-e) surpass the thickness of copper strip to a certain value, the cracks would appear. The bigger the sum is, the larger the cracks extend, and the bigger the formed pores are. When the ploughing extrusion tool goes through the rectangle channels, the metal in V-channels could flow upward and downward along the forming faces of the tool and forms the fins at the bottom of rectangle channels and the fringe of V-channels, while after the tool departing from the rectangle channels, the metal could only flows upwards results that the fins at the fringe of V-channels are higher. So the final fringes of V-channels are wavy fin structures, which are advantageous for enhancing boiling further.
Inspec keywords: two-phase flow; nucleation; cracks; channel flow; strips; heat pipes; copper; structural engineering; planing; extrusion; planing machines; heat transfer; forming processes; boiling
Subjects: Fracture mechanics and hardness (mechanical engineering); Machining; Fluid mechanics and aerodynamics (mechanical engineering); Forming processes; General shapes and structures; Production equipment
Related content
content/conferences/10.1049/cp_20060867
pub_keyword,iet_inspecKeyword,pub_concept
6
6