Knowledge Management System of Institue of Mechanics, CAS
Numerical Study Of Heat Transfer Mechanism In Turbulent Supercritical Co2 Channel Flow | |
Li XL(李新亮); Hashimoto K; Tominaga Y; Tanahashi M; Miyauchi T; Li, XL (reprint author), Tokyo Inst Technol, Dept Mech & Aerosp Engn, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528550, Japan. | |
发表期刊 | Journal of Thermal Science And Technology |
2008 | |
页码 | 112-123 |
ISSN | 1880-5566 |
摘要 | Direct numerical simulation (DNS) of supercritical CO2 turbulent channel flow has been performed to investigate the heat transfer mechanism of supercritical fluid. In the present DNS, full compressible Navier-Stokes equations and Peng-Robison state equation are solved. Due to effects of the mean density variation in the wall normal direction, mean velocity in the cooling region becomes high compared with that in the heating region. The mean width between high-and low-speed streaks near the wall decreases in the cooling region, which means that turbulence in the cooling region is enhanced and lots of fine scale eddies are created due to the local high Reynolds number effects. From the turbulent kinetic energy budget, it is found that compressibility effects related with pressure fluctuation and dilatation of velocity fluctuation can be ignored even for supercritical condition. However, the effect of density fluctuation on turbulent kinetic energy cannot be ignored. In the cooling region, low kinematic viscosity and high thermal conductivity in the low speed streaks modify fine scale structure and turbulent transport of temperature, which results in high Nusselt number in the cooling condition of the supercritical CO2. |
关键词 | Turbulent Heat Transfer Supercritical Flow Direct Numerical Simulation Turbulent Channel Flow Simulation Equation State |
DOI | 10.1299/jtst.3.112 |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000264829800013 |
关键词[WOS] | SIMULATION ; EQUATION ; STATE |
WOS研究方向 | Thermodynamics |
WOS类目 | Thermodynamics |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/25542 |
专题 | 力学所知识产出(1956-2008) |
通讯作者 | Li, XL (reprint author), Tokyo Inst Technol, Dept Mech & Aerosp Engn, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528550, Japan. |
推荐引用方式 GB/T 7714 | Li XL,Hashimoto K,Tominaga Y,et al. Numerical Study Of Heat Transfer Mechanism In Turbulent Supercritical Co2 Channel Flow[J]. Journal of Thermal Science And Technology,2008:112-123. |
APA | 李新亮,Hashimoto K,Tominaga Y,Tanahashi M,Miyauchi T,&Li, XL .(2008).Numerical Study Of Heat Transfer Mechanism In Turbulent Supercritical Co2 Channel Flow.Journal of Thermal Science And Technology,112-123. |
MLA | 李新亮,et al."Numerical Study Of Heat Transfer Mechanism In Turbulent Supercritical Co2 Channel Flow".Journal of Thermal Science And Technology (2008):112-123. |
条目包含的文件 | 下载所有文件 | |||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
J2007-25.pdf(6090KB) | 开放获取 | -- | 浏览 下载 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论