Numerical Study Of Heat Transfer Mechanism In Turbulent Supercritical Co2 Channel Flow
文献类型：期刊论文
| 作者 | Li XL(李新亮) ; Hashimoto K; Tominaga Y; Tanahashi M; Miyauchi T
|
| 刊名 | Journal of Thermal Science And Technology
 |
| 出版日期 | 2008 |
| 页码 | 112-123 |
| 通讯作者邮箱 | mtanahas@mes.titech.ac.jp |
| 关键词 | Turbulent Heat Transfer Supercritical Flow Direct Numerical Simulation Turbulent Channel Flow Simulation Equation State |
| ISSN号 | 1880-5566 |
| 通讯作者 | Li, XL (reprint author), Tokyo Inst Technol, Dept Mech & Aerosp Engn, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528550, Japan. |
| 中文摘要 | 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. |
| 类目[WOS] | Thermodynamics |
| 研究领域[WOS] | Thermodynamics |
| 关键词[WOS] | SIMULATION ; EQUATION ; STATE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000264829800013 |
| 公开日期 | 2009-08-03 ; 2009-09-14 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/25542]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 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.(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. |
入库方式： OAI收割
来源：力学研究所
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