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Experimental and Numerical Simulations of Flow and Heat Transfer in Heat Exchanger Elements Using Liquid Crystal Thermography
被引:0
作者:
Jan STASIEK
Michele CIOFALO
Maciej WIERZBOWSKI
机构:
[1] University of Palermo
[2] Poland
[3] Dipartimento Ingeneria Nucleare
[4] Narutowicza 11/12
[5] I-90128 Palermo
[6] Italy
[7] Heat Technology Dept.
[8] 80-952 Gdansk
[9] Gdansk Univ. of Technology
[10] Viale delle Scienze
关键词:
liquid crystal thermography;
heat transfer enhancement;
D O I:
暂无
中图分类号:
TK124 [传热学];
学科分类号:
080701 ;
摘要:
Experimental and numerical investigation of heat transfer and fluid flow were conducted for classic heat exchanger elements (flat plate with fin-tubes in-line, staggered and with vortex generators) and corrugated-undulated ducts under transitional and weakly turbulent conditions.The dependence of average heat transfer and pressure drop on Reynolds number and geometrical parameters was investigated. Distributions of local heat transfer coefficient were obtained by using liquid crystal thermography and surface-averaged values were computed. Three-dimensional numerical simulations were conducted by a finite-volume method using a low-Reynolds number k-e model under the assumption of fully developed flow. Computed flow fields provided otherwise inaccessible information on the flow patterns and the mechanisms of heat transfer enhancement.
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页码:133 / 137
页数:5
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