Theoretical Study of Natural Convective Heat Transfer in a Vertical Hexagonal Sub Channel
The development of new practices in nuclear reactor safety aspects and optimization of recent nuclear reactors, including the APWR and the PHWR reactors, needs a knowledge on natural convective heat transfer within subchannels formed among several nuclear fuel rods or heat exchanger tubes. Unfortunately, the currently available empirical correlation equations for such heat transfer modes are limited and researches on convective heat transfer within a bundle of vertical cylinders (especially within the natural convection modes) are scarcely done. Although boundary layers around the heat exchanger cylinders or fuel rods may be dominated by their entry regions, most of available convection correlation equations are for fully developed boundary layers. Recently, a combination of experimental and theoretical study on natural convective heat transfer in a sub-channel formed by several heated parallel cylinders that arranged in a hexagonal configuration has been being done. The study seeks for a new convection correlation for the natural convective heat transfer in the sub-channel formed among the hexagonal vertical cylinders. The theoretical part of the study is reported in this paper. A new convective heat transfer correlation equation has been obtained from the theoretical study and compared to several similar equations from previous studies and literatures. The new correlation equation obtained from the study shows similar trends to the one of other equations.
natural convection sub channel vertical cylinder thermo-hydraulic analysis
Nathanael P. Tandian Efrizon Umar Toto Hardianto Anggoro Septilarso
Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Jl. Ganesa 10, Bandung, Nuclear Technology Center for Materials and Radiometry, National Nuclear Energy Agency, Bandung, Ind Nuclear Energy Regulation Agency, Jakarta, Indonesia
国际会议
The 7th International Conference on Fluid and Thermal Energy Conversion(第七届流动技术与热能转化国际会议 FTEC 2011)
郑州
英文
194-202
2011-09-24（万方平台首次上网日期，不代表论文的发表时间）